CN101590489B - Board width controller of hot rolling mill and control method thereof - Google Patents

Abstract

The present invention provides a board width controller of a hot rolling mill and a control method thereof. The fine finishing width reduction amount can be estimated with a high precision in a preset stage for controlling the board width without the dependence to the fine rolling. The board width controller of the hot rolling mill controls the board width of hot-rolled strip coil to a target board width given by the manufacturing instruction. The controller comprises the following components: a width roller which rolls the heated steel bar in the width direction; a roughing mill which is adjacent with the width rolling mill and rolls the steel bar obtained after the rolling the width rolling mill in the board thickness direction; and a finishing mill which further rolls the steel bar obtained after the rolling of the width rolling mill and the roughing mill in the board thickness direction for producing the hot-rolled strip coil. The board width controller further comprises the following components: a fine finishing width reduction estimation amount calculating part which estimates the board width reduction amount of the finishing mill; and a first board width target modifying part, wherein, the control instruction calculated based on the target board width modified by the modifying part is output to the width rolling mill.

Description

Wide control device of the plate of hot-rolling mill and control method

Technical field

The present invention relates to the wide control device of plate and the control method of hot-rolling mill.

Background technology

Current; Existing method as the wide control of plate of carrying out hot-rolling mill; For example in the flat 2007-50413 communique (document 1) of TOHKEMY; Following method has been shown: preserve rolling example data by each operational elements, according to come to predict accurately finished width by the data of the similar operational elements of rolled material, control according to this information of forecasting.

In addition, in TOHKEMY 2002-224723 communique (document 2), following method is shown: the wide prediction type correction term of plate is defined as the function of the composition element amount of rolling stock, in the wide control of plate, uses and to revise.

Further; In the flat 9-225513 communique (document 3) of TOHKEMY; Following method is shown: adopt information before rolling to learn the relation between the wide real data of plate of vertical roughing real data and level after rolling after rolling; Through adopting learning outcome to predict that repeatedly the plate behind rolling stock rolling is wide, thereby make setting (set up) high precision int of the vertical mill (vertical rolling mill) of follow-up rolling stock.

For example; In TOHKEMY 2003-211212 communique (document 4); Disclose the width control method of following finishing mill: adopting between any support that is arranged on the hot finishing mill of forming by a plurality of supports (stand) or the wide meter of plate (the wide meter of intermediate plate) of finishing mill exit side and be arranged on next-door neighbour's devices for taking-up (downcoiler: down coiler) in before the width control of the wide meter of plate (the wide meter of soleplate); Infer the real data of the wide meter of soleplate according to the wide actual measured value of the plate of the wide meter of intermediate plate, change the desired value of the wide meter of intermediate plate according to the difference between the goal-setting value of this presumed value and the wide meter of soleplate.

But there is following problem in these methods.

In the document 1, though adopt the key element that can detect to carry out similarity determination as operational elements, the similitude that relates to non-detectable key element can not inevitable be judged.Therefore; Though the irregular distribution of the width of the wide slab before rolling of plate exerts an influence to finished width; But because the method for in common hot rolling line, the width of the wide slab before rolling of plate directly not being measured; Therefore, because the problem that this point can exist the precision of prediction of the wide finished width after rolling of plate to reduce.

In addition; In the control method of in document 2, putting down in writing; Come detailed consideration to be carried out the elastoplastic property of the wide rolled steel of plate though can adopt the information of composition element; But do not consider the multiple factor that impacts to finished width, particularly do not consider influence to the wide width of plate slab before rolling of plate.Therefore, since the irregular distribution of width of plate slab, the problem that exists the finished width precision to reduce.

On the other hand, in order to use in the document 3 control method of record, the plate that must measure vertical rolling front and back is wide, plate wide, the thickness of slab of level after rolling.Therefore, the detector of each amount of measurement must be set, have the problem of system expensive.In addition; Even suppose to be provided with these detectors; But in roughing, owing to implement to remove the processing of rust removing of the surperficial oxide layer (scale) of rolling stock usually, therefore because consequent steam; Thereby certainty of measurement is reduced and can not measure, existence can not be used the problem of this control method.Further, because the wide row operation of going forward side by side of plate after must suppose that the plate of vertical slab after rolling is wide and coming repeatedly prediction level rolling, so existence is provided with the problem of calculation of complex.

The prior art of record can not be applied to the Steckel mill of being made up of unified base (Steckel mill) in the document 4.That is, in Steckel mill, can not as the hot finishing mill of forming by a plurality of supports, carry out the Tension Control between finishing mill, can not online (on line) the control precision-machined plate wide.In addition, when finish rolling, produce the reduced width of big slab.Therefore, the method for said prior art can not be applied to possess in the rolling equipment of Steckel mill same as before.

Summary of the invention

The objective of the invention is to solve one of said at least problem.

For example, be purpose with wide control device of the plate that a kind of hot-rolling mill is provided and control method thereof, in the wide control of the plate in hot rolling, can be wide by the plate that simple calculating controls accurately by rolled material.

For example, be purpose with the wide control technology of the plate that a kind of hot-rolling mill is provided, can infer the finished width reductions with high accuracy in preset stage, thereby can not rely on the wide control of plate of finish rolling.

For reaching said purpose, the wide control device of the plate of the hot-rolling mill that the 1st the present invention is correlated with, to get into again by the continuous casting machine casting roughing mill by the slab of rolled material; With the wide Rack that becomes of edging mill control panel; Afterwards, control makes by finishing mill the wide desired value that becomes of the plate by rolled material after rolling, it is characterized in that; Comprise: the wide forecast model of plate, preserve slab width and the operation of rolling and rolling after the relation of the plate by rolled material between wide; The wide portion of inferring of plate, according to the indicated value and the rolling information relevant with this slab that obtains from hot-rolling mill of the width of slab, the plate by rolled material that adopts the wide forecast model of plate to infer by finishing mill after rolling is wide; The wide deviation accumulation of plate portion, to after being rolled by rolled material, the accumulation plate wide infer portion infer the result and rolling after the wide actual measured value of the plate by rolled material between deviation; Self adaptation portion, based on the content correction of the wide deviation accumulation of this plate portion be rolled rolling after the wide desired value of the plate by rolled material; And preset control section, carry out computing through adopting the wide desired value of being revised by this self adaptation portion of plate, thereby calculate and export control instruction edging mill.

The wide control device of the plate of the hot-rolling mill that the 2nd the present invention is correlated with; To get into again by continuous casting machine casting roughing mill by the slab of rolled material, with the wide Rack that becomes of edging mill control panel, afterwards; Control makes by finishing mill the wide desired value that becomes of the plate by rolled material after rolling; It is characterized in that, comprising: the wide forecast model of plate, preserve slab width and the operation of rolling and rolling after the relation of the plate by rolled material between wide; Width of plate slab is inferred portion, according to the wide actual measured value of the plate by rolled material after rolling with obtain from hot-rolling mill with by the relevant rolling information of rolled material, the wide forecast model of plate is carried out inverse operation, infer by the width of the slab before rolled material rolling; Width of plate slab deviation accumulation portion accumulates this width of plate slab and infers the deviation between the indicated value of the width of inferring result and slab of portion; Learning section is revised the indicated value of the width of slab based on the content of this width of plate slab deviation accumulation portion; And preset control section, carry out computing through the width that adopts the slab of revising by this learning section, thus calculate and output be used for the plate after rolling by rolled material wide be made as desired value, to the control instruction of edging mill.

The wide control device of the plate of the hot-rolling mill that the 3rd the present invention is correlated with; To get into again by continuous casting machine casting roughing mill by the slab of rolled material, with the wide Rack that becomes of edging mill control panel, afterwards; Control makes by finishing mill the wide desired value that becomes of the plate by rolled material after rolling; It is characterized in that, comprising: the wide forecast model of plate, preserve slab width and the operation of rolling and rolling after the relation of the plate by rolled material between wide; The wide portion of inferring of plate, according to the indicated value and the rolling information relevant with slab that obtains from hot-rolling mill of the width of slab, the plate by rolled material that adopts the wide forecast model of plate to infer by finishing mill after rolling is wide; The wide deviation accumulation of plate portion, to after being rolled by rolled material, the accumulation plate wide infer portion infer the result and rolling after the wide actual measured value of the plate by rolled material between deviation; Self adaptation portion, based on the content correction of the wide deviation accumulation of this plate portion be rolled rolling after the wide desired value of the plate by rolled material; Width of plate slab is inferred portion, according to the wide actual measured value of the plate by rolled material after rolling with obtain from hot-rolling mill with by the relevant rolling information of rolled material, the wide forecast model of plate is carried out inverse operation, infer by the width of the slab before rolled material rolling; Width of plate slab deviation accumulation portion accumulates this width of plate slab and infers the deviation between the indicated value of the width of inferring result and slab of portion; Learning section is revised the indicated value of the width of slab based on the content of this width of plate slab deviation accumulation portion; And preset control section, some in the output through Selecting and Applying this learning section and the output of self adaptation portion carries out computing, thus calculate and output be used for the plate after rolling by rolled material wide be made as desired value, to the control instruction of edging mill.

The plate width controlling method of the wide control device of plate of the hot-rolling mill that the 4th the present invention is correlated with; To get into again by continuous casting machine casting roughing mill by the slab of rolled material; With the wide Rack that becomes of edging mill control panel; Afterwards, control makes by finishing mill the wide setting that becomes of the plate by rolled material after rolling, it is characterized in that; Preserve slab width and the operation of rolling and rolling after the relation of the plate by rolled material between wide; According to the wide actual measured value of the plate by rolled material after rolling with obtain from hot-rolling mill with by the relevant rolling information of rolled material, to the width of slab and the operation of rolling and rolling after the relation of the plate by rolled material between wide carry out inverse operation, infer by the width of the slab before rolled material rolling; In the 1st form accumulation this infer the deviation between the indicated value of width of result and slab; Adopt the indicated value and the rolling information relevant that obtains from hot-rolling mill of the width of slab with slab, infer slab width, the operation of rolling and rolling after the plate by rolled material between wide relation and by finishing mill the plate after rolling by rolled material wide, to after rolling by rolled material; Calculate the wide deviation of inferring between result and the wide actual measured value of plate of plate; And be accumulated in the 2nd form, obtain continuous casting machine casting beginning back or carry out the rolling number after die width changes, when rolling number is that fixed value is when following; The indicated value of the width of the slab that is rolled according to the 1st table contents correction; When rolling number during greater than fixed value, the wide desired value of the plate by rolled material that is rolled according to the 2nd table contents correction, according to correction result calculate and output be used for the plate after rolling by rolled material wide be controlled at setting, to the control instruction of edging mill.

Further, in order to solve said problem, the present invention is the wide control device of a kind of plate of hot-rolling mill, comprising: the width milling train is rolled on width the steel after the heating; Roughing mill, adjacent with said width milling train, on the thickness of slab direction, being rolled by the said steel behind the width mill milling; And finishing mill; Steel to after rolling by said width milling train and roughing mill further are rolled on the thickness of slab direction; Produce hot-rolled coil, the plate of controlling said hot-rolled coil is wide wide for the Target Board that is provided by fabrication order, it is characterized in that; Comprise: finished width dwindles the amount of inferring calculating part, infers and calculate the wide reductions of plate in the said finishing mill; And the wide desired value correction of the 1st plate portion; It is wide to adopt the output of said finished width reductions calculating part to revise said Target Board, and the wide control device output of the plate of this hot-rolling mill is wide with the Target Board of being revised by this correction portion to be control instruction to the said width milling train that the basis calculates.

According to the present invention, as one of effect, in the wide control of the plate in hot rolling, can be wide through the plate that simple calculating controls accurately by rolled material.

As another effect, can in the stage of presetting, infer the finished width reductions accurately, can not rely on finish rolling and carry out the wide control of plate.

Description of drawings

Fig. 1 is the concept map of structure of the control system of the plate wide control device of expression with the 1st embodiment of the present invention.

Fig. 2 is the figure of structure example of the PDI table of expression the 1st embodiment.

Fig. 3 is the wide flow chart of inferring the processing of portion of plate of expression the 1st embodiment.

Fig. 4 is the structure chart of structure of the wide deviation accumulation of the plate portion of expression the 1st embodiment.

Fig. 5 is the flow chart of processing of slab (slab) the width inverse operation portion of expression the 1st embodiment.

Fig. 6 is the structure chart of structure of the width of plate slab deviation accumulation portion of expression the 1st embodiment.

Fig. 7 is the flow chart of the processing carried out of the switching part of expression the 1st embodiment.

Fig. 8 is the flow chart of the processing of presetting (preset) control part of expression the 1st embodiment.

Fig. 9 is the sketch map of contents processing of S84～S86 of the preset control section of expression the 1st embodiment.

Figure 10 is the concept map that is illustrated in the structure of the control system that comprises adaptive gain (adaptive gain) calculating part in the wide control device of plate that the 2nd embodiment of the present invention relates to.

Figure 11 is the flow chart of the processing carried out of the adaptive gain calculating part of expression the 2nd embodiment.

Figure 12 is the figure of the adaptive error series of tables of expression the 2nd embodiment.

Figure 13 is the figure of the board thickness control apparatus that relates to of explanation the 3rd embodiment.

Figure 14 is the figure that the explanation finished width dwindles the example of self adaptation scale.

Figure 15 is the figure that the expression finished width dwindles the example of adaptive gain table.

Figure 16 is the figure of the example of the relation between the rolling roll coil of strip of expression (coil) number and the model error.

Figure 17 is the figure of the relation between the wide and model error of the plate before and after the expression reduced width correction.

Figure 18 is the processing before of the wide correction of precision-machined plate is calculated in explanation based on the wide desired value correction of the 1st plate portion figure.

Figure 19 is the figure of the example of expression roughing width self adaptation amount preservation table.

Figure 20 is the figure of the wide determining method of the Target Board in each passage (pass) of explanation roughing width milling train.

Figure 21 is the figure of the wide modification method of the Target Board in each passage of explanation roughing width milling train.

Figure 22 is the figure of the processing before explanation correction roughing Target Board wide 1 and the width milling train drafts command value that determines each passage of roughing.

Among the figure: the wide control device of 100-plate, 101-preset control section, the wide portion of inferring of 102-plate, the wide deviation accumulation of 104-plate portion (the 2nd form), 105-self adaptation portion; 106-width of plate slab inverse operation portion, 108-width of plate slab deviation accumulation portion (the 1st form), 109-learning section, 110-switching part, the wide forecast model of 115-plate; The 150-hot-rolling mill, 151-edging mill (edger), 154-roughing mill, 155-finishing mill, 156-slab (by rolled material); 157-steel plate (by rolled material), 161-thin-slab caster (continuous casting machine), 180-thickness of slab control part, 190-PDI table, 10001-adaptive gain calculating part; β-adaptive gain, Δ wact-deviation, the wide control device of 1100-plate, 1110-fabrication order; The wide desired value correction of 1120-the 1st plate portion, the 1121-finished width dwindles the amount of inferring calculating part, and the 1122-finished width dwindles self adaptation amount calculating part, and the 1123-finished width dwindles self adaptation amount validity quantification portion; The 1131-finished width dwindles self adaptation amount preservation table, and the 1132-finished width dwindles adaptive gain preservation table, the wide desired value correction of 1140-the 2nd plate portion, the wide self adaptation amount of 1141-roughing plate calculating part; The wide self adaptation amount of 1142-roughing plate validity quantification portion, the wide rolling model of 1150-plate, the wide self adaptation amount of 1151-roughing plate is preserved table, and the wide adaptive gain of 1152-roughing plate is preserved table; 1160-width milling train is provided with portion, the wide real data collection of 1170-roughing plate portion, and the wide real data collection of 1180-precision-machined plate portion, 1200-controls object; 1210-slab extraction portion, 1215-heating furnace, the rolling portion of 1220-width, 1205-slab; 1225-width milling train, 1235-roughing mill, 1240-finish rolling portion, 1245-finishing mill (Steckel mill: steckel mill); 1250-roll coil of strip reeling end, 1255-downcoiler, the wide meter of 1261-roughing discharging side plate, the wide meter of 1262-fine finishining discharging side plate.

The specific embodiment

(summary of wide control device of the plate of hot-rolling mill of the present invention and control method thereof)

Wide control device of the plate of hot-rolling mill of the present invention and control method thereof are suitable for; In hot rolling; The irregular distribution by the width of plate slab before rolled material rolling through steel plate rolling before and after paying close attention to etc. is simply calculated, thereby makes the plate by rolled material after rolling wide consistent with desired value.

Especially, be suitable for the big low profile thermal milling train (mini hot) of correlation of the wide irregular distribution of the plate by rolled material after rolling, directly be transported in the so-called bar mill of steel rolling mill at the slab by the continuous casting machine casting, the present invention is especially effective.

Below, describe with reference to accompanying drawing to embodiment of the present invention.

(the 1st embodiment)

Fig. 1 is the concept map of structure of the S of control system of the plate wide control device 100 of expression with the 1st embodiment of the present invention.

(structure) with S of control system of the wide control device 100 of plate

The S of control system with wide control device 100 of plate of the 1st embodiment comprises: hot-rolling mill 150, i.e. equipment of hot rolling; With the wide control device 100 of plate, it receives various signals from this hot-rolling mill 150, exports control signal to the edging mill 151 of the hot-rolling mill 150 of control object and the roller gap between the roller 151r of control edging mill 151.

(hot-rolling mill 150)

At first, structure as the hot-rolling mill 150 of the control object of the wide control device 100 of plate is described.

Hot-rolling mill 150 is the equipment that is commonly called bar mill that carries out unified casting/rolling process.

This hot-rolling mill 150 comprises: thin-slab caster 161, its be used to cool off the high temperature that provides from funnel 164 iron etc. by the molten steel of rolled material (molten steel), and form the slab in the cross section of solid shape; Flame cutting machine (torch cutter) 162, it will be cut to specific length by rolled material from what this thin-slab caster 161 sent; Continuous tunnel furnace (tunnel furnace) 163, it is heated by rolled material what cut off by this flame cutting machine 162; Roughing mill 154 adopts the vertical roller of edging mill 151, makes the slab 156 by rolled material that sends from this continuous tunnel furnace 163 form Rack, and adopt horizontal mill R1, that R2 carries out level is rolling; And finishing mill 155, adopt the tandem mill F1～F5 of 5 supports to carry out finish rolling.

In addition, in the 1st embodiment, being that steel plate 157 describes by rolled material.

(thin-slab caster 161)

The thin-slab caster 161 that Fig. 1 representes has: accumulate iron etc. by the funnel 164 of the molten steel of the high temperature of rolled material; With the mould (mold) 165 of casting mold, its molten steel for the high temperature that will provide from funnel 164 is cooled to slab 156, and has and the corresponding size of the thickness/width of slab 156.

(roughing mill 154)

Roughing mill 154 comprises: edging mill 151, and it will be by the wide Rack that forms of the plate of rolled material; The horizontal mill R1 of 2 supports, R2, it is rolled in the thickness of slab direction by rolled material what send from edging mill 151, forms specific thickness.

The edging mill 151 that the mark E1 of Fig. 1 representes has 2 vertical roller 151r of the rotating shaft of vertical direction in two sides of the slab that is transmitted 151 (surface of the paper of Fig. 1, the inside direction).

Through adjusting distance (roller gap) between this roller 151r (being arranged on the distance between the surface of the paper of Fig. 1, pair of rolls 151r on the direction of the inside), thereby the plate of the slab 151 that control is compressed by 2 vertical roller 151r is wide.

(finishing mill 155)

Finishing mill 155 is tandem mill F1～F5 of 5 supports, by the Rolling roller 159 of each tandem mill F1～F5, the steel plate 157 by rolled material that sends from roughing mill 154 is rolled in the thickness of slab direction successively, is processed into desirable thickness of slab.

(rolling process of hot-rolling mill 150)

The rolling process of hot-rolling mill 150 is according to carrying out to get off.

As shown in Figure 1, store in the funnel 164 by the high-temperature molten steel of rolled material, be sent to mould 165 through deadweight, the molten steel of high temperature cools off after coagulation by the outside in mould 165, generates the steel of 70～85mm left and right thickness.Then, these steel are by being cut off by flame cutting machine 162 about every length 10m～30m, and becoming before rolling is slab 156 by rolled material.

This slab 156 is by after continuous tunnel furnace 163 insulations, heating; In roughing mill 154; The pair of rolls 151r that is rotated on every side by the vertical axis (the paper above-below direction of Fig. 1) along edging mill 151 is rolled on width, and by horizontal mill R1, R2 after rolling on the thickness direction, in finishing mill 155; Each Rolling roller 159 by tandem mill F1～F5 is rolled on thickness direction, forms the steel plate 157 about thickness 2mm～10mm.

Here, possess the wide meter 158 of plate at the exit side of finishing mill 155, the plate by rolled material of measuring steel plate 157 grades is wide.

Though omit among Fig. 1,, afterwards, in discharging roller-way (run out table) (not shown), steel plate 157 is cooled off, batch by downcoiler (not shown) and be hot rolled steel plate.

(the wide control device 100 of plate)

Below, describe to the structure of the wide control device 100 of plate in the roller gap between the roller 151r of edging mill 151 of this hot-rolling mill 150 of control.

The wide control device 100 of the plate of representing among Fig. 1 for example adopts, and PLC (programmable logiccontroller) specializes.

The wide control device 100 of plate; Hot-rolling mill 150 carry out rolling before; From PDI (PrimaryData Input) table 190 (with reference to Fig. 2), obtain wide by the Target Board of the steel plate 157 of rolled material; Calculating is used to realize the roller gap command value between the roller 151r of edging mill 151 of this operation, exports control instruction to edging mill 151 from preset control section 101.

Edging mill 151 is controlled to be distance between roller 151r based on the roller gap from the roller gap command value of the wide control device 100 of plate, and processes.

In addition, Fig. 2 is the figure of the structure example of expression PDI table 190.

As shown in Figure 2, in PDI table 190, preserve each item destination datas such as the steel grade 190a corresponding, width of plate slab 190b with steel plate sequence number 190o.

In Fig. 2, express, for steel plate sequence number HX0012352, steel grade 190a:SS400, width of plate slab 190b:1220mm, the wide 190c:1200mm of Target Board etc.

The charging of representing among Fig. 2 begins back or width and changes back order 190i and represent that behind thin-slab caster 151 charging (casting) beginning backs or the change casting width, which individual steel plate 157 HX0012352 is.

In addition, so-called " width changes the back " meaning is, becomes desirable width in order to make the steel plate 157 after rolling, after the width setup value of thin-slab caster 161 grades changes.

The wide control device 100 of the plate of representing among Fig. 1 comprises the wide forecast model 115 of plate; The wide forecast model 115 of this plate is according to the as-rolled conditions such as variation of the thickness of slab in the roller gap of edging mill 151 and roughing mill 154, the finishing mill 155; The plate of inferring the steel plate 157 after rolling is wide, its content by after formula (1)～formula (6) expression of stating.

The wide control device 100 of plate comprises: the wide portion 102 of inferring of plate; Its hot-rolling mill 150 from the control object obtain the rolling real data of roughing mill 154 and finishing mill 155 and by roughing mill 154 real data such as thickness of the slabs 156 before rolling, it is wide to adopt the wide forecast model 115 of plate to infer the plate of the steel plate 157 after rolling; The wide deviation calculation of plate portion 103, the deviation between the wide actual measured value of plate of the corresponding steel plate of being measured by the wide meter 157 of plate 157 (with reference to Fig. 1) after it calculates the wide output of inferring portion 102 of plate and reality is rolling; The wide deviation accumulation of plate portion 104, it accumulates the value of the wide deviation of plate that is calculated by the wide deviation calculation of plate portion 103 to recently rolling steel plate 157; And self adaptation portion 105; It adopts the value of the wide deviation of plate of accumulation in the wide deviation accumulation of the plate portion 104; Calculate the Self Adaptive Control amount, this Self Adaptive Control amount is used for the wide desired value of plate is revised so that after rolling to be become desirable plate by rolled material (steel plate 157) wide.

In addition; The wide control device 100 of the plate that Fig. 1 representes comprises: width of plate slab inverse operation portion 106; It is from the hot-rolling mill 150 of control object; Obtain roughing mill 154 and finishing mill 155 rolling real data and by behind measured rolling of the wide meter of plate 158 by the wide value of plate of rolled material (steel plate 157), the width of the slab 156 before rolling in the roughing mill 154 is carried out inverse operation; Width of plate slab deviation calculation portion 107, it calculates the width of plate slab deviation according to the inverse operation result that carries out based on the wide forecast model 115 of the plate of width of plate slab inverse operation portion 106 obtaining after the inverse operation with by the indicated width of plate slab 190b of PDI table 190; Width of plate slab deviation accumulation portion 108, the value of the width of plate slab deviation that its long-term accumulated is calculated by width of plate slab deviation calculation portion 107; And learning section 109, it adopts the value of the width of plate slab deviation of accumulation in the width of plate slab deviation accumulation portion 108, calculates the study controlled quentity controlled variable, and this Learning Control amount is used for revising preset control section 101 and is presetting the width of plate slab that calculating is used.

Also comprise switching part 110; This switching part 110 is according to PDI table 190; Judge that this slab 156 is which individual slab 156 after charging (casting) beginning back or the thin-slab caster 161 change width setup values, and will export preset control section 101 to the information that the output of self adaptation portion 105 and learning section 109 is switched.

The wide control device 100 of the plate of representing among Fig. 1 adopts these structures, and the roller gap command value between the roller 151r of calculating edging mill 151 will be controlled indication and export edging mill 151 to from preset control section 101.

Below, be elaborated to the structure of each several part.

(the wide portion 102 of inferring of plate)

Below, the wide wide portion 102 of inferring of plate of the plate by the steel plate 157 of rolled material to inferring after rolling explains according to Fig. 3.In addition, Fig. 3 is the wide flow chart of inferring the processing of portion 102 of display plate.

Among the S31 of Fig. 3,, calculate the reduced width amount Δ W1 behind rolling in the edging mill 151 (with reference to Fig. 1) of E1 for the width B 0 of the slab 156 before roughing mill 154 rolling.Reduced width amount Δ W1 by

ΔW1＝B0-Se ...(1)

Expression, wherein, Se: the roller gap of edging mill 151.

Among the S32 of Fig. 3, the S33, calculate the width extensive magnitude among the horizontal mill R1 in the roughing mill 154.Promptly; Among the S32 of Fig. 3; Calculating by level rolling cause by the width extensive magnitude Δ W2 of rolled material (rectangle amount Δ W2); Among the S33 of Fig. 3, calculate because edging mill 151 rolling makes steel plate 157 grades returned back to the width extensive magnitude that plate width direction produces (dog bone (dog bone) width extensive magnitude, promptly the dog bone restores (dogbone recovery) and measures Δ W3) by rolled material in make progress end that compacted back protrudes of third side on the thickness of slab direction.

Being represented by this tittle sum among the horizontal mill R1 by the width extensive magnitude of the steel plate 157 of rolled material.

Rectangle amount Δ W2 among the S32 of Fig. 3 is calculated by following formula (2), and in addition, the dog bone recovery amount Δ W3 among the S33 of Fig. 3 is calculated by following formula (3).

[several 1]

ΔW2＝B·(H/h) ^S …(2)

S＝exp{-1.64(B/H) ^0.376·(B/Ld) ^0.016B/H·(H/R) ^0.015B/H}

$\mathrm{Ld}:=\sqrt{R\·(H-h)}$

[several 2]

ΔW3＝ΔB _E·exp{-1.877(ΔB _E/B ₀) ^0.063·(H/R _E) ^0.441·(R _E/B ₀) ^0.989·(B ₀/Se) ^7.591}

…(3)

ΔB _E＝B0-Se

Wherein, B ₀: width of plate slab;

B: horizontal mill R1 charging side plate wide (=Se);

R _E: the roller diameter of edging mill 151;

Se: the roller gap of edging mill 151;

R: the working roll radius of horizontal mill R1;

H: horizontal mill R1 feed side thickness of slab;

H: horizontal mill R1 exit side thickness of slab.

Among the S34 of Fig. 3, by following formula (4), among the horizontal mill R2 of calculating chart 1 expression by the width extensive magnitude Δ W4 of the steel plate 157 of rolled material.

[several 3]

ΔW4＝B·(H/h) ^S …(4)

S＝exp{-1.64(B/H) ^0.376·(B/Ld) ^0.016B/H·(H/R) ^0.015B/H}

$\mathrm{Ld}:\sqrt{R\·(H-h)}$

Wherein, B: horizontal mill R2 charging side plate is wide;

R: the working roll radius of horizontal mill R2;

H: horizontal mill R2 feed side thickness of slab;

H: horizontal mill R2 exit side thickness of slab.

Among the S35 of Fig. 3, by following formula (5), the both sides ora terminalis by the steel plate 157 of rolled material among the tandem mill F1～F5 of calculating finishing mill 155 is the reduced width amount Δ W5 between the edge.

[several 4]

ΔW5＝b _F·{1/exp(ε _L/2)-1} …(5)

ε _L＝ε _P+ε _C

ε _P＝A·tb ^B

ε _C＝C·tb ^m·t ⁿ

b _F: Target Board is wide;

Tb: the tension force by rolled material that gets into tandem mill F1 is rear tension force;

T: tension force elapsed time (time that tension force is exerted one's influence to steel plate 157);

A, B, C, m, n: constant.

And among the S36, the wide Wc of the plate by rolled material of steel plate 157 grades after the final processing is inferred by following formula (6).B ₀Be the wide 190d of slab that obtains from PDI table 190.

Wc＝B0-ΔW1+ΔW2+ΔW3+ΔW4-ΔW5 ...(6)

More than, be the wide processing of inferring portion 102 of plate, formula (1)～formula (6) is called as the wide forecast model 115 of plate (with reference to Fig. 1).

In addition, formula (2)～formula (5) is known empirical formula.

(the wide deviation calculation of plate portion 103)

By the wide deviation calculation of the plate of representing among Fig. 1 portion 103 calculate the wide predicted value of plate after rolling by the steel plate 157 of rolled material be the corresponding reality of being measured by the wide meter 158 of plate of Wc and predicted value Wc by the deviation delta Wact between the wide Wa of plate of the steel plate 157 of rolled material.

(the wide deviation accumulation of plate portion 104)

Fig. 4 is the structure chart of the structure of the wide deviation accumulation of display plate portion 104.

In the wide deviation accumulation of the plate of representing among Fig. 4 portion 104; To be rolled recently by the steel plate 157 of rolled material; Attach in confirming the information of this steel plate, store the wide deviation delta Wact of plate and the wide desired value of plate is carried out revised amount (adaptation value) Δ Wadap wide the setting when calculating of plate.

For example, represent among Fig. 4, carry out last time after rolling by the roll coil of strip of rolled material (steel plate 157), for the correction (adaptation value Δ Wadap) of the wide desired value enforcement-11mm of plate and be provided with among the result after the calculating, the wide deviation delta Wact of plate is+3mm.In addition, after being rolled last time by the roll coil of strip of rolled material (steel plate 157), for the correction (adaptation value Δ Wadap) of the wide desired value enforcement-10mm of plate and be provided with among the result after the calculating, the wide deviation delta Wact of plate is-1mm.

(width of plate slab inverse operation portion 106)

Below; Describe to width of plate slab inverse operation portion 106; This width of plate slab inverse operation portion 106 according to the rolling real data of roughing mill of representing among Fig. 1 154 and finishing mill 155, by the wide meter 158 of plate measure rolling after by the wide value of plate of the steel plate 157 of rolled material, the width of the slab 156 before rolling is carried out inverse operation.

Fig. 5 is the flow chart of the processing of expression width of plate slab inverse operation portion 106.

Among the S51 of Fig. 5, according to determined by the wide meter 158 of plate (with reference to Fig. 1) rolling after by the wide Wa of plate of the steel plate 157 of rolled material, the wide Wfin of the plate by rolled material in the tandem mill F1 feed side of finishing mill 155 (with reference to Fig. 1) is carried out inverse operation.

In the tandem mill F1 feed side by the wide Wfin of plate of the steel plate 157 of rolled material, through after rolling by the wide Wa of plate of the steel plate 157 of rolled material on add formula (5) Δ W5 obtain.

Then, among the S52 of Fig. 5, the wide Wr2 of plate by the steel plate 157 of rolled material in the feed side of horizontal mill R2 (with reference to Fig. 1) is carried out inverse operation.The wide Wr2 of plate of horizontal mill R2 feed side obtains through deducting Δ W4 (with reference to formula (4)) among the wide Wfin of plate in milling train F1 feed side.

Among the S53 of Fig. 5, width of plate slab B0 is carried out inverse operation.

At first; Shown in following formula (7); Among the wide Wr2 of the plate by rolled material from the feed side of horizontal mill R2 (with reference to Fig. 1); Deduct gap Se and middle horizontal rolling width extensive magnitude (rectangle amount) the Δ W2 that representes of formula (2) of the roller 151r of edging mill 151, thereby obtain dog bone (dogbone) width extensive magnitude (dog bone recovery amount) Δ W3.

ΔW3＝Wr2-Se-ΔW2 ...(7)

With Δ W3 substitution formula (3), find the solution through being directed against B0, thus can inverse operation width of plate slab B0.

Formula (3), though carry out algebraically and find the solution to B0, the value that obtains as width of plate slab of substitution successively among the width of plate slab B0 on the right through trying to achieve the B0 near the Δ W3 of result of calculation institute substitution, can be carried out finding the solution of simple numeric value analysis.

Here the B0 that obtains; Of course not directly corresponding to the inconsistent value between the width of plate slab 190b indicated in the width of plate slab of reality and the PDI table 190, but will comprise the inconsistent resulting value afterwards between the predicated error that contained in formula (2)～formula (5) etc. is integrated into width of plate slab B0 and PDI table 190 in interior irregular distribution the indicated value (190b).

(width of plate slab deviation accumulation portion 108)

Fig. 6 is the structure chart of the structure of expression slab width difference accumulation portion 108.

As shown in Figure 6; In the width of plate slab deviation accumulation portion 108; Press by the wide 108a of each Target Board of the steel plate 157 of rolled material; With being begun by new order by append serial numbers 108b from nearest steel plate 157 after being rolled by rolled material by steel plate 157 corresponding width of plate slab deviations (deviation between the indicated value 190b of the width of plate slab B0 that obtains and the width of plate slab of the PDI table 190) 108c of rolled material, and preservation between long-term.

For example, as shown in Figure 6, for the steel plate 157 of the wide 900mm of Target Board, in the last time rolling real data, the width of plate slab deviation is-6mm, and in the last time rolling real data, the width of plate slab deviation is-3mm.

(switching part 110)

Below, describing to switching part 110, this switching part 110 will export the preset control section of representing among Fig. 1 101 to the information that the output of the output of self adaptation portion 105 and learning section 109 is switched.

When calculating the gap between the roller 151r of the edging mill 151 that on the plate width direction of slab 156, is rolled in the preset control section of the wide control device 100 of plate 101, switching part 110 selects to use the some results' among the result of result and learning section 109 (with reference to Fig. 1) of self adaptation portion 105 (with reference to Fig. 1) processing.

Fig. 7 is the flow chart of the processing of expression switching part 110 execution.

At first, among the S71 of Fig. 7, after the width of from the 190i of PDI table 190, obtaining charging (casting) beginning back or mould 165 (with reference to Fig. 1) changes by the number of the steel plate 157 of rolled material.In addition, the width of mould 165 is corresponding with the casting width of thin-slab caster 161, decides the width of slab 156 by these.

Here, the reason after the width that is made as charging (casting) beginning back or mould 165 (with reference to Fig. 1) changes be change in the charging sometimes, i.e. in the casting by the width setup of rolled material.

Among the S72 of Fig. 7, based on this value, the correlation of the width of the slab 156 that carries out being rolled next time is judged.That is, the width of the width of the next slab 156 that is rolled of the judgement slab 156 whether (for example, last time and preceding for several times) is rolled with recently has big correlation.

The similitude of the size of correlation and the width of slab 156, be that the temporal degree of approach is corresponding, judge whether the number by the steel plate 157 of rolled material that in the S71 of Fig. 7, obtains is littler than fixed value.

Particularly, after the width of charging beginning back or mould 165 changes, begun counting by the number of the steel plate 157 of rolled material, it is little to be judged to be correlation under the situation about diminishing, and it is big to be judged to be correlation in the absence about diminishing.

For example; Under the situation that casting beginning back is the 1st; Since and can't be expected correlation in the wide deviation of plate between the steel plate 157 of rolled material after rolling last time, therefore to the predicated error that contains in formula (2)～formula (5) etc., should compensate according to long-standing trend.Promptly; After the width change of charging beginning back or mould 165, begun counting by the number of the steel plate 157 of rolled material; Under the 1st situation, last time rolling is rolling before the width of the rolling or mould 165 in the charging of carrying out last time changes, can't expect correlation of data.Therefore, the data according to stocking between long-term should compensate according to the result with how many errors.

Here, among the S73 of Fig. 7, start the learning section of representing among Fig. 1 109.In the learning section 109; For be kept at 108 (with reference to the Fig. 6) of width of plate slab deviation accumulation portion in the wide 108a of corresponding Target Board, with reference to slab width difference 108c, according to following formula (8); Through handling this tittle is carried out weighted average, calculate learning outcome Wt.

Wt＝∑(ωiΔSi)/∑ωi ...(8)

Wherein, ω i: weighted value;

Δ Si: width of plate slab deviation.

ω i is the weighted value for each width of plate slab deviation delta Si, can all be 1 also, also can make being increased by the weighted value of the steel plate 157 of rolled material of being rolled recently, lays particular stress on nearest width of plate slab deviation delta Si and calculates learning outcome Wt.On the other hand; Be not the 1st in result of determination, promptly under the situation more than the 2nd; Owing to be according to the slab of casting with the width that was rolled last time 156 by the identical mould 165 of the steel plate of rolled material 157, thus and next time rolling by the wide deviation of plate between the steel plate 157 of rolled material in can expect big correlation.

Therefore, among the S74 of Fig. 7, start self adaptation 105 (with reference to Fig. 1) of portion.

In the self adaptation portion 105, the wide deviation delta Wact of plate with reference to the wide deviation accumulation of the plate portion 104 (with reference to Fig. 4) that is calculated by the steel plate 157 by rolled material that is rolled recently calculates self adaptation Wa as a result.

The wide deviation accumulation of reference plate portion 104 can only be rolled last time by the wide deviation of plate of the steel plate 157 of rolled material, under with the purpose of self adaptation result as stable value, also can with reference to recently several by the wide deviation delta Wact of plate of the steel plate 157 of rolled material.Under the former situation, adopt following formula (9), handle according to following formula (10) under the latter's the situation and carry out weighted average, calculate self adaptation Wa as a result.

Be provided with in the calculating,,, can offset its effect therefore through deducting adaptation value Δ Wadap owing to revised the wide desired value of plate wide the setting when calculating of plate.

Wa＝ΔCpre-(Wadap)pre ...(9)

Wherein, Δ Cpre: the wide deviation of plate in the last time rolled plate 157;

(Wadap) pre: last time rolled plate 157 the adaptation value Δ Wadap that uses in the calculating is set

Wa＝∑{ωi(ΔCi-(Wadap)i)}/∑ωi ...(10)

Wherein, ω i: weighted value;

Δ Ci: the wide deviation of plate;

(Wadap) i: adaptation value.

Among the S75 of Fig. 7, export the result who obtains to preset control section 101.

In addition; In this embodiment; Use learning section 109 among the S72 of Fig. 7 also is to use the judgement of self adaptation portion 105; Rolling number after changing according to the width of charging (casting) beginning back or mould 165 is carried out, but also can use some in the rolling number after the width change of rolling number or mould 165 after charging (casting) begins.

In addition, usually, the rolling number that adopts in the judgement of the S72 of Fig. 7 is set to 1, and the slab that after beginning for casting or die width change back is the 1st uses learning section 109, for the output of this situation use self adaptation portion 105 in addition.

(preset control section 101)

Below, describing to the processing of preset control section 101, this preset control section 101 exports the roller gap command value between roller 157r to represent among Fig. 1 edging mill 151.

Fig. 8 is the flow chart of the processing of expression preset control section 101.

Among the S81 of Fig. 8; Receive the output of described switching part 110 (with reference to Fig. 1); Be rolled next time by the setting of the steel plate 157 of rolled material, judgement be the enforcement compensation carried out of learning section 109 study is preset or the self adaptation of the enforcement that self adaptation portion 105 is carried out compensation presets.

Among the S81 of Fig. 8; Be judged as under the situation of learning to preset; Among the S82 of Fig. 8,, width of plate slab (190b) Ws that the value that obtains behind gain (gain) α of regulation adds preservation in PDI table 190 (with reference to Fig. 2) will multiply by on the learning outcome Wt (with reference to formula (8)) according to following formula (11); Try to achieve Ws_cont, carry out the following calculating that is provided with.

Gain is got 0～1 value usually, and the reliability of learning outcome Wt is high more, can be set at big value more.Under the extremely low situation of the reliability of learning outcome Wt, be made as 0.

Ws_cont＝Ws+α·Wt ...(11)

On the other hand; Among the S81 of Fig. 8, be judged as under the situation that self adaptation presets, among the S83; According to following formula (12); To multiply by Target Board wide (190c) Wc_target that the value that obtains behind the adaptive gain β of regulation adds preservation in PDI table 190 (with reference to Fig. 2) on the Wa (with reference to formula (9)) as a result in self adaptation, try to achieve Wc_cont, carry out the following calculating that is provided with.

Adaptive gain β is the same with gain; Usually; Get 0～1 value, have big correlation more, then can be set at big value more by (Δ Ci-(Wadap) i) (with reference to formula (9)) between the roll coil of strip (by the steel plate 157 of rolled material) of the detected error of the nearest roll coil of strip (by the steel plate 157 of rolled material).

Wc_cont＝Wc_target+β·Wa ...(12)

Among the S84 of Fig. 8; The wide control part 180 of slave plate (with reference to Fig. 1), obtain rolling progress (will be by the steel plate 157 of rolled material from the rolling setting result of how many mm of being of how many mm) by each of the horizontal mill R1 that representes among Fig. 1, R2, tandem mill F1～F5 and by the tensometer between the support of tandem mill F1～F5 (not shown) measure by the value of the tension force of the steel plate 157 of rolled material etc.

Among the S85 of Fig. 8,, adopt the wide forecast model 115 of plate (with reference to Fig. 1) to calculate the wide presumed value of fine finishining charging side plate (the wide presumed value of charging side plate of the finishing mill of representing among Fig. 1 155) by said formula (1)～formula (6) expression according to the wide Wc_cont of Target Board.

The wide presumed value of fine finishining charging side plate obtains through the Δ W5 that on the wide Wc_cont of Target Board, adds formula (5).

Among the S86 of Fig. 8, calculate the wide presumed value Welb of discharging side plate of edging mill 151 (with reference to Fig. 1).

The wide presumed value Welb of discharging side plate of edging mill 151; Through the width extensive magnitude Δ W4 among the horizontal mill R2 of the dog bone recovery amount Δ W3 among the horizontal mill R1 of the rectangle amount Δ W2 among the horizontal mill R1 that from the wide presumed value of among S85, obtaining of fine finishining charging side plate, deducts said formula (2), formula (3), formula (4), and obtain.

Schematically show above processing among Fig. 9.In addition, Fig. 9 is the sketch map of contents processing of the S84～S86 of expression preset control section 101.

According to the wide Wc_cont of Target Board, calculate the wide presumed value of fine finishining charging side plate that gets into tandem mill F1, and then calculate the wide presumed value of E1 (edging mill 151) discharging side plate.

Below, among the S87 of Fig. 8, calculate the width of slab 156 is implemented the Breadth Maximum drafts that can adjust and the wide presumed value Welf of discharging side plate of the edging mill 151 that obtains.

Among the S88 of Fig. 8, according to the magnitude relationship of 2 E1 wide presumed value Welb of (edging mill 151) discharging side plate and Welf, can judgement be carried out width and make.

For example, under the situation of the steel plate 157 of the wide 910mm of plate after expecting finish rolling, wide at Target Board can only be under the situation of 900mm, can not carry out width and make.

As shown in Figure 9, when Welb >=Welf, can carry out width and make, when Welb＜Welf, even since the Breadth Maximum drafts can not to obtain Target Board wide, therefore can not carry out width and make.

Among the S88 of Fig. 8, can carry out under the situation that width makes being judged to be, among the S89 of Fig. 8, the load that calculates the roller gap (distance between roller 151r) of edging mill 151, on edging mill 151, increases, and to edging mill 151 outputs.

On the other hand; Among the S88 of Fig. 8; Can not carry out under the situation that width makes being judged to be; Among the S810 of Fig. 8, thickness of slab control part 180 (with reference to Fig. 1) is sent the indication of calculating again of rolling progress (how many mm will be rolling to the setting of how many mm by the steel plate 157 of rolled material from) by each of the horizontal mill R1 that representes among Fig. 1, R2, tandem mill F1～F5.

In this 1st embodiment; Though illustration has also explained that thin-slab caster 161 is 1 a situation; But also there is a plurality of casting equipments (multiple roll type: the strand) situation of (at the paper of Fig. 1, surface, many thin-slab casters 161 are set on the direction of the inside) parallel block 156.In this case; Each multiple roll type comprises 104 (with reference to the Fig. 1) of the wide deviation accumulation of plate portion; Which multiple roll mold casting self adaptation portion 105 must judge slabs 156 by, and is employed in the data of accumulating in the wide deviation accumulation of the plate portion 104 corresponding with the multiple roll type and carries out computing.Even under these circumstances, can use the present invention too through said structure.

In addition, in the 1st embodiment, comprise self adaptation portion 105 and 109 liang of sides of learning section, represented to switch the example that uses, but also can often use a certain side.

(the 2nd embodiment)

Below, describe to the 2S of control system of the 2nd embodiment.

Figure 10 is the concept map that is illustrated in the structure of the 2S of control system that comprises adaptive gain calculating part 10001 in the wide control device 100 of plate of the 2nd embodiment that the present invention relates to.

The 2nd embodiment comprises adaptive gain calculating part 10001 in the wide control device 100 of the plate of the 1st embodiment, this adaptive gain calculating part 10001 calculates adaptive gain β (with reference to formula (12)).

Therefore other structures are represented for identical structural element additional phase mark together owing to identical with the 1st embodiment, are omitted detailed explanation.

Obtain recently among the wide deviation accumulation of adaptive gain calculating part 10001 slave plates 104 (with reference to Fig. 4) of portion in the wide control device 100 of the plate of the 2nd embodiment last time for example or for several times before the wide deviation delta Wact of plate and the adaptation value Δ Wadap of the steel plate 157 that is rolled, come the adaptive gain β of optimization formula (12) automatically according to the size of correlation.In addition, the computational methods of adaptive gain β are narrated later on.

(adaptive gain calculating part 10001)

Below, describe to the processing of the adaptive gain calculating part 10001 of the wide control device 100 of plate.

Figure 11 is the flow chart of the performed processing of the adaptive gain calculating part 10001 of expression the 2nd embodiment.

Among the S111 of Figure 11, adaptive gain calculating part 10001 is obtained the content of the wide deviation accumulation of plate portion 104 (with reference to Fig. 4), generates the adaptive error series of tables of representing among Figure 12.In addition, Figure 12 is the figure of the adaptive error series of tables of expression the 2nd embodiment.

The 1st adaptive error series of representing among Figure 12; Be to deduct the value that obtains behind the adaptation value Δ Wadap among the wide deviation delta Wact of plate of the wide deviation accumulation of the plate portion 104 that from Fig. 4, representes, the 2nd adaptive error series of representing among Figure 12 is the value that the value with the 1st adaptive error series only is shifted and obtains behind the steel plate 157.

For example, in the wide deviation accumulation of the plate of representing among Fig. 4 portion 104, because in rolling roll coil of strip last time (after last time is rolling by the steel plate 157 of rolled material), the wide deviation of plate be+3m, and adaptation value be-11mm, so the value of the serial correspondence of the 1st adaptive error is 14mm.Likewise, can calculate 9mm, 17mm.On the other hand, after the 2nd adaptive error series displacement the 1st error series, can calculate 9mm, 17mm ...

Here, with adjacent be that the correlation by the relevant wide predicated error of plate of the steel plate of rolled material 157 of continuous rolling is represented by the 1st adaptive error series and the serial phase cross correlation of the 2nd adaptive error.

Generally, when correlation is big, through next time rolling estimated with last time rolling in resulting identical predicated error, can adaptive gain β be made as big value, energetically the wide predicated error of compensating plate.On the contrary, when correlation hour, can not adaptive gain β be made as big value.Adaptive gain calculating part 10001 is paid close attention to this point and is carried out the setting of adaptive gain β.

Among the S112 of Figure 11, adaptive gain calculating part 10001 calculates the correlation of the wide deviation of plate of the recently rolling roll coil of strip (by the steel plate 157 of rolled material).

That is, through following formula (13), the Conv of cross correlation mutually between the 1st adaptive error series of calculating the adaptive error series of tables of representing among Figure 12 and the 2nd adaptive error series.

Conv＝Cov(x，y)/(σx·σy) ...(13)

Wherein, and Cov (x, y): the 1st adaptive error series and the serial covariance of the 2nd adaptive error;

σ x: the variance of the 1st adaptive error series;

σ y: the variance of the 2nd adaptive error series.

Here, under the big situation of phase cross correlation Conv, can make adaptive gain β big.And, among the S113 of Figure 11, be the basis with the value of the phase cross correlation that obtains, decide adaptive gain β.

Adaptive gain β for example can be calculated by formula (14).

β＝K·Conv ...(14)

Wherein, K: constant.

In addition, adaptive gain β as stated, gets 0～1 value, has big more correlation and just is set to big more value, and K plays the effect that adjustment replaces.

Through above computing, pay close attention to the correlation of the adaptive error series of the nearest wide forecast model 115 of plate in rolling, can adaptive gain β be set at suitable value on-line automaticly.

Like Fig. 1, shown in Figure 10, controlled by the edging mill that possesses in the roughing mill 154 151 by the plate of the steel plate 157 of rolled material is wide.Generally, decided by the width of the slab 156 of continuous casting machine (thin-slab caster 151) the casting width by the mould 165 of casting machine, the wide irregular distribution of the plate that the slab of continuous casting is 156 is few.

Therefore, when directly being transported to steel rolling mill like the small-sized slab 156 that rolls casting the ironworks, the plate of the slab 156 of continuous rolling is wide to have correlation.On the other hand, in moment of the width that has changed mould 165 etc., lose this correlation.

Pay close attention to this point; In order to realize the wide control of high-precision plate by rolled material; Comprise: width of plate slab deviation calculation portion 107, its steel plate that is rolled 157 grades by rolled material in, according to by wide value of detected plate and rolling real data such as the wide meters 158 of plate; To before rolling being that slab 156 width carry out inverse operation by rolled material, calculate deviation from the indicated value of slab 156 width; Width of plate slab deviation accumulation portion 108, the width of plate slab deviation that its accumulation is calculated; The wide portion 102 of inferring of plate, its plate of inferring the steel plate 157 after rolling according to slab 156 width and rolling real data is wide; The wide deviation accumulation of plate portion 104, the deviation between its accumulation presumed value and the actual plate that obtains are wide; Learning section 109, it learns the trend of slab 156 width differences from the content of slab width difference accumulation portion 108, and the output learning outcome; Self adaptation portion 105, the wide estimation error of prediction plate in the content of the wide deviation accumulation of its slave plate portion 104, and prediction of output result; And preset control section 101; It pays close attention to from the plate of rolling slab 156 of current beginning and the slab 156 that is rolled recently the correlation between wide; Optionally adopt the output of learning section and the output of self adaptation portion to carry out the wide prediction computing of plate, the operating side of calculating the wide control of plate according to predicting the outcome is the setting value of edging mill 151.

In the wide control of the plate of hot rolling, simply calculate through the correlation of slab 156 width that are rolled before and after being conceived to, the plate by rolled material that can control steel plate 157 grades accurately is wide.

The present invention can be widely used in the wide control of plate of hot-rolling mill.

(the 3rd embodiment)

Figure 13 is the figure of the board thickness control apparatus that relates to of this embodiment of explanation.The wide control device 1100 of plate receives various signals from control object 1200, and exports control signal to control object 1200.The structure of control object 1200 at first, is described.

Control object 1200 is width control lines (line) of hot-rolling mill; The slab 1205 that from slab extraction portion 1210 is width 1000mm～1600mm of extracting of heating furnace 1215 is rolled at width by the width milling train of rolling 1220 of width 1225, carries out the back and forth rolling of 3 passages (pass) to 7 passages by the roughing mill 1235 of roughing portion 1230.Here, width milling train 1225 and roughing mill 1235 adjacent settings carry out back and forth rolling in width milling train 1225 and roughing mill 1235 simultaneously.

Afterwards, in the Jill Sterkel formula finishing mill 1245 of finish rolling portion 1240, the fore-and-aft direction level of carrying out 3 passage to 7 passages is rolling, is that downcoiler 1255 batches by the roll coil of strip devices for taking-up of roll coil of strip reeling end 1250.Here, it is wide that the wide meter of roughing discharging side plate 1261 is measured by width milling train 1225 and roughing mill 1235 plate of the slab 1205 after just rolling, and it is wide that the wide meter 1262 of fine finishining discharging side plate is measured by finish rolling portion 1240 plate of the steel plate after just rolling.Here, the Target Board after the final passage that the finishing mill 1245 of slab 1205 is carried out is rolling is wide, below, it is wide to be called the fine finishining Target Board.In addition, the Target Board after the final passage that roughing mill 1235 is carried out is rolling is wide, below, it is wide to be called the roughing Target Board.

The purpose of the wide control of plate is, make by the measured plate of the wide meter of fine finishining discharging side plate 1261 wide be that Target Board is wide consistent by production control 1110.

Below, the structure of the wide control device 1100 of display plate.The wide control device 1100 of plate comprises: fabrication order 1110, and the fine finishining Target Board of its indication roll coil of strip is wide; Finished width dwindles the amount of inferring calculating part 1121, and it infers and calculate the wide reductions of plate in the finishing mill 1245; And the wide desired value correction of the 1st plate portion 1120, it is wide that the fine finishining Target Board is revised in its output of adopting finished width to dwindle the amount of inferring calculating part 1121.

In addition, comprising: the wide real data collection of roughing plate portion 1170, it collects the wide real data of plate of the wide meter 1261 of roughing discharging side plate; The wide real data collection of precision-machined plate portion 1180, it collects the wide real data of plate of the wide meter 1262 of fine finishining discharging side plate; Finished width dwindles self adaptation amount calculating part 1122, its according to wide by the measured plate of the wide meter of roughing discharging side plate 1261 and by the measured plate of the wide meter of fine finishining discharging side plate 1262 difference between wide, infer the finished width reductions; And finished width dwindles self adaptation amount preservation table 1131, and it is preserved and dwindles the finished width that self adaptation amount calculating part 1122 calculated by finished width and dwindle the self adaptation amount.

In addition, comprising: the wide rolling model 1150 of plate, it is according to the plasticity information of drafts, rolling gap or the steel of width milling train 1225 and roughing mill 1235 etc., and the plate of inferring the roughing mill exit side is wide; The width milling train is provided with portion 1160, and it adopts the wide rolling model 1150 of plate to decide the control instruction of the wide milling train of plate; The wide self adaptation amount of roughing plate calculating part 1141, it is difference between wide according to the corresponding plate that 1150 plates of inferring out of the wide rolling model of plate are wide and the wide meter of roughing discharging side plate 1261 is detected, comes the model error of the wide rolling model 1150 of quantification plate; The wide self adaptation amount of roughing plate is preserved table 1151, and it preserves the wide self adaptation amount of roughing plate that is calculated by the wide self adaptation amount of roughing plate calculating part 1141; And the wide desired value correction of the 2nd plate portion 1140, it adopts the output of the wide self adaptation amount of roughing plate calculating part 1141 to come the revise goal plate wide.

Further; Comprise: finished width dwindles self adaptation amount validity quantification portion 1123; It is to each steel plate that is rolled recently; Obtain by the measured plate of the wide meter of roughing discharging side plate 1261 wide and by the measured plate of the wide meter of fine finishining discharging side plate 1262 difference between wide, the correlation of each steel plate of this difference of quantification; Dwindle adaptive gain preservation table 1132 with finished width, its preservation is dwindled adaptive gain by the finished width that finished width dwindles 1123 quantification of self adaptation amount validity quantification portion.In addition; Also comprise: the wide self adaptation amount of roughing plate validity quantification portion 1142; It is to each steel plate after recently rolling; Obtain by the measured plate of the wide meter of roughing discharging side plate 1261 wide and 1150 plates of inferring out of the wide rolling model of plate difference between wide, the correlation of each steel plate of this difference of quantification; Preserve table 1152 with the wide adaptive gain of roughing plate, it preserves the wide adaptive gain of roughing plate by 1141 quantification of the wide self adaptation amount of roughing plate validity quantification portion.

Finished width dwindles in the amount of the inferring calculating part 1121, and finished width dwindles the amount of inferring Shrink_pre and calculated by for example formula (15).

[several 15]

Shrink_pre=A/ph ^B+ CLog (ph)+D formula (15)

Wherein, ph: finishing mill target thickness of slab;

A, B, C, D: reduced width amount calculating parameter.

Here, the parameter A in the formula (15), B, C, the D slab thickness of slab after by each rolling steel grade, finish rolling classify (classified).Finished width dwindles self adaptation amount calculating part 1122 and revises the reduced width amount of the inferring Shrink_pre that calculated by formula (15) and the error between the real data reduced width amount Shrink_act.

The real data plate of the slab after roughing mill is rolling is wide to be that the wide reduced width amount error delta Shrink (Br_act) during for Br_act of the real data plate of the slab before the finish rolling is stored in the table (with reference to Figure 13) that obtains after classifying by the total passage number of times of slab thickness of slab, fine finishining after each rolling steel grade, the finish rolling.This roll coil of strip n reduced width amount error delta Shrink (Br_act in certain classification; I) (i=1,2 ..., n) by in the stage of accumulating; With the function of the wide Br of plate of the slab of this reduced width amount error delta Shrink before, be similar to by m approximate formula of formula (16) expression as finish rolling.Here, this quilt is approximate reduced width amount correction is as Shrink_comp.In addition, the calculating of this reduced width correction Shrink_comp is implemented in each classification independently.

[several 16]

$\mathrm{Shrink}\_\mathrm{Comp}\left(\mathrm{Br}\right)=\underset{k=0}{\overset{m}{\mathrm{\Σ}}}{a}_k\·{\mathrm{Br}}^k$ Formula (16)

Wherein, Br: the plate of the slab before the finish rolling is wide;

Ak: parameter.

Here, the table that obtains after being stored in and classifying by the total passage number of times of slab thickness of slab, fine finishining after each rolling steel grade, the finish rolling of parameter ak is that finished width dwindles in the self adaptation amount preservation table 1131.

Figure 14 is the figure of example of the table (finished width dwindles the self adaptation scale) under the situation of explanation m=2.

In addition, carry out self adaptation amount validity quantification, promptly, carry out dwindling the best applications of self adaptation amount by formula (16) finished width that is calculated through decision adaptive gain α through dwindle self adaptation amount validity quantification portion 1123 by finished width.The determining method of adaptive gain α is described.The autocorrelation of paying close attention to real data error row decides adaptive gain.

Add on the finished width reductions Shrink_pre that is calculated by formula (15) resulting revised reduced width amount and real data reduced width amount Shrink_act after the reduced width correction that is calculated by formula 2 poor, be that reduced width amount model error Cm is represented by formula (17).

[several 17]

Cm=Shrink_act-(Shrink_pre+Shrink_comp) formula (17)

Therefore, be (Cm) n-1 if establish the model error of the roll coil of strip of last time when rolling, establishing the roll coil of strip of the last time model error when rolling is (Cm) n-2, then error vector is represented by formula (18).

[several 18]

((Cm) n-1, (Cm) n-2 ...) formula (18)

Wherein, (Cm) i: the reduced width amount model error that is observed in the roll coil of strip before the i roll coil of strip.

Here, establishing (Cm) i is Xi, and establishing (Cm) i-1 is (Y1) i, generates Xi and (Y1) data rows of i.Thus, set up corresponding as data rows by the resulting model error of the adjacent roll coil of strip.Likewise, establishing (Cm) i is Xi, and establishing (Cm) i-2 is (Y2) i, generates Xi and (Y2) data rows of i.Thus, between 1 roll coil of strip, the model error of the adjacent roll coil of strip can make up as the data rows of correspondence.Below, adopt each data rows to calculate Xi and (Y1) i and Xi and (Y2) Cov1 of cross correlation mutually, the Cov2 of i by formula (19), formula (20).

[several 19]

$\mathrm{<figure-callout\; id="1"\; label="Cov"\; filenames="H2009102028570E00021.png,H2009102028570E00051.png"\; state="\{\{state\}\}">Cov</figure-callout>}1=\frac{\mathrm{Cov}(X,Y1)}{\mathrm{\&sigma;\; X}\&CenterDot;\mathrm{\&sigma;\; <figure-callout\; id="1"\; label="Y"\; filenames="H2009102028570E00021.png,H2009102028570E00051.png"\; state="\{\{state\}\}">Y</figure-callout>}1}$ Formula (19)

[several 20]

$\mathrm{<figure-callout\; id="2"\; label="Cov"\; filenames="H2009102028570E00051.png,H2009102028570E00102.png"\; state="\{\{state\}\}">Cov</figure-callout>}2=\frac{\mathrm{Cov}(X,Y2)}{\mathrm{\&sigma;\; X}\&CenterDot;\mathrm{\&sigma;\; <figure-callout\; id="2"\; label="Y"\; filenames="H2009102028570E00051.png,H2009102028570E00102.png"\; state="\{\{state\}\}">Y</figure-callout>}2}$ Formula (20)

Wherein, (x y) is represented by formula (21) Cov.

[several 21]

Cov (x, y)=(1/n) ∑ (x _i-x) (y _i-y) formula (21)

Here, Cov1 representes the size of relevance of the model error of the adjacent roll coil of strip, and Cov1 greatly just means that the correlation of error is big.Likewise, the value of Cov2 greatly just means also has the big correlation of error between the roll coil of strip between 1.Under the big situation of correlation, model error and reduced width correction Shrink_comp directly set up correspondence.On the contrary, under the little situation of correlation, the relevance between model error is little, means that can not to make the value of gain big.By more than, according to the value of Cov1, Cov2, with multiply by the value (with reference to formula (22)) that the value of obtaining behind suitable constant b1, the b2 is set at gain vector α above that.

[several 22]

α=(b ₁, b ₂) (Cov1, Cov2)=b ₁Cov1+b ₂Cov2 formula (22)

By more than, based on the wide desired value correction of the 1st plate portion 1120 be used to calculate the wide correction Bf_comp of the wide fine finishining Target Board of roughing Target Board and represent by formula (23).

[several 23]

B _f_ comp=Shrink_pre+ α Shrink_comp formula (23)

When therefore, the wide Br_tgt of roughing Target Board adopts the wide Bf_tgt of fine finishining Target Board of fabrication order 1110 to represent is formula (24).

[several 24]

B _r_ tgt=B _f_ tgt+Shrink_comp formula (24)

Here, to be stored in the table of classifying by the total passage number of times of slab thickness of slab, fine finishining after each rolling steel grade, the finish rolling be that finished width dwindles in the adaptive gain preservation table 1132 to gain.

Figure 15 is the figure of example of the table (finished width dwindles the adaptive gain table) under the situation of expression n=2.

Figure 16 is the figure of the example of the relation between rolling roll coil of strip number of expression and the model error.Shown in diagram, can know, revise, just can reduce model error through the real data that adopts a plurality of rolling roll coil of strips.In addition, Figure 17 is the figure of the relation between the wide and model error of plate before and after the expression reduced width correction.

Figure 18 is the figure of the processing before the calculating of the wide correction of precision-machined plate of explanation the 1st plate wide desired value correction portion 1120.

Among the step S106-1, obtaining fabrication order is fine finishining target thickness of slab.Among the step S106-2, fine finishining target thickness of slab of being obtained by this quilt and formula (15) calculate finished width and dwindle the amount of inferring Shrink_pre.Among the step S106-2, confirming current rolling number, is that N is individual consistent if rolling number is calculated with rolling number with predefined self adaptation amount, then gets into self adaptation amount calculation process from step S106-4.Among the step S106-4, calculate finished width according to the computational methods of formula (16) and dwindle self adaptation amount Shrink_comp, among the step S106-5, calculate adaptive gain α according to the computational methods of formula (22).Among the step S106-6, the rolling counting of initialization promptly returns 0 and finish self adaptation amount calculation process.

Then; Get into step S106-7; According to the adaptive gain α that the finished width that is calculated by step S106-2 dwindles the amount of inferring Shrink_pre, the finished width that calculated by step S106-4 dwindles self adaptation amount Shrink_comp and calculated by step S106-5; Adopt the formula (23) in the wide desired value correction of the 1st plate portion 1120 to calculate the wide correction Bf_comp of precision-machined plate, thereby finish to calculate.

In addition; Among the step S106-2,, then do not get into self adaptation amount calculation process if the not enough N of rolling number is individual; And directly get into step S106-7; Dwindle on the amount of inferring Shrink_pre, the self adaptation amount sub-value α on sub-value Shrink_comp, the adaptive gain according to the finished width that calculates by step S106-2, adopt the formula (23) in the wide desired value correction of the 1st plate portion 1120 to calculate the wide correction Bf_comp of precision-machined plate, thereby finish to calculate.

Then; The plate that the wide self adaptation amount of roughing plate calculating part 1141 adopts the wide rolling model 1150 of plates to infer out rough machined real data plate wide and that obtained by the wide real data collection of roughing plate portion 1170 is wide; Come the model error of the wide rolling model 1150 of quantification plate, calculate the correction value of the value of this quantification as roughing Target Board wide 1.Here, the wide rolling model 1150 of plate is formed with 2 model formations of the width extensive magnitude of the part that is commonly referred to as rectangle (rectangle) portion by inferring the part that is commonly referred to as the dog bone.As this model formation, known several model formations for example, have formula (25), formula (26).

[several 25]

Dw1={ (H/h) ^α-1} * B ₀Formula (25)

Here,

α＝η·exp{-1.877(ΔB/B) ^0.063(H/R _E) ^0.441·(R _E/B ₀) ^0.989·(B ₀/B) ^7.591}

[several 26]

Dw2=β (B ₀-Se) formula (26)

Here,

$\mathrm{\&beta;}=\mathrm{\&xi;}\&CenterDot;\exp \{-1.64{(B_0/H)}^{0.376}\&CenterDot;{(B_0/\mathrm{Ld})}^{0.016B_0/H}\&CenterDot;{(H/R)}^{0.015B_0/H}\}$

Wherein, dw1: dog osseous part width extensive magnitude [mm];

Dw2: rectangular portion width extensive magnitude [mm]

B0: width milling train charging side plate wide [mm]

B: width milling train discharging side plate wide [mm]

R _E: width mill rolls diameter [mm]

Se: width milling train gap [mm]

Ld：(R·(H-h)) ^1/2[mm]

α, β, η, ξ: the width extensive magnitude is calculated with parameter [-] commonly used

R: roughing mill working roll radius [mm]

H: roughing feed side thickness of slab [mm]

H: roughing exit side thickness of slab [mm]

The plate of inferring out by the wide rolling model 1150 of plate wide with the wide difference of real data plate be that to be stored in wide by each rolling steel grade, roughing the 1st passage charging side plate be the slab thickness of slab after width of plate slab, the roughing and in the table that obtains after classifying to the wide error Br_comp of roughing plate.The wide error Bri_comp (i=1 of roughing plate n of certain this roll coil of strip of classification; 2 ..., n) by in the stage of accumulating; The wide error of this roughing plate is the function of the wide correction Br_comp of roughing plate as the wide Br_tgt of roughing Target Board, is similar to by m the approximate formula of representing in the formula (27).In addition, being similar in each classification of the wide correction Br_comp of this roughing plate carried out by independent.

[several 27]

$\mathrm{Br}\_\mathrm{Comp}(\mathrm{Br}\_\mathrm{Tgt})=\underset{k=0}{\overset{m}{\mathrm{\&Sigma;}}}{c}_k\&CenterDot;{(\mathrm{Br}\_\mathrm{Tgt})}^k$ Formula (27)

Wherein, Br_tgt: the Target Board after the final passage of roughing is rolling is wide;

Ck: parameter.

Here, parameter c k is stored in the roughing width self adaptation amount preservation table 1151 that obtains after classifying by the slab thickness of slab after each rolling steel grade, width of plate slab, the roughing.

Figure 19 is the figure of the example of the table (roughing width self adaptation amount preserve table) under the situation of expression n=2.

In addition, through carrying out self adaptation amount validity quantification by the wide self adaptation amount of roughing plate validity quantification portion 142, promptly through decision adaptive gain γ, the roughing width that carries out being calculated by formula (27) enlarges the best applications of self adaptation amount.It is identical that the determining method of adaptive gain γ and described finished width dwindle self adaptation amount validity quantification portion 1123, and the autocorrelation of paying close attention to real data error row decides.The adaptive gain γ that is determined is stored in the wide adaptive gain preservation of the roughing plate table 1152 that obtains after classifying by the slab thickness of slab after each rolling steel grade, width of plate slab, the roughing.By more than, calculate the wide correction B ' r_comp of Target Board of the final passage of roughing of the wide desired value correction of the 2nd plate portion 140 by formula (14).

[several 28]

B ' r_comp=γ Br_comp formula (28)

Adopt this wide correction Br ' of roughing Target Board _ comp that calculates, by the wide 2Br_tgt_new of formula (29) the revised roughing Target Board of expression.

[several 29]

Br_tgt_new=Br_tgt+B ' r_comp formula (29)

In addition; According to the model formation of the wide 2Br_tgt_new of roughing Target Board that obtains after this correction and formula (25) and formula (26) record, gap command value and roughing width desired value Bri_tgt (i: the passage number of times) in portion's 1150 each passage of decision roughing are set by the wide milling train of plate.In decision, adopt maximum reduction and the minimum drafts and the wide Br_tgt of roughing Target Board of the width milling train that is predetermined.At first, only adopt the maximum reduction of width milling train, be rolled from the 1st passage to final passage.Then, only adopt the minimum drafts of width milling train, reverse rolling from wide Br_tgt to the 1 passage of the Target Board of final passage.

Among Figure 20, expression is adopted the situation that the maximum reduction of this width milling train is rolled and is only adopted the example of the reverse rolling situation of minimum drafts.Here, shown in figure 21 under the situation that the intersection point P between m passage and (m+1) passage exists, the drafts when revising the m+1 passage and depressing.This revised drafts is exported as the control instruction value of giving width milling train 1225.

Figure 22 is that explanation correction roughing Target Board is wide by 1001, and the figure of the processing before the width milling train drafts command value of each passage of decision roughing.

Among the step S1010-1, the roughing Target Board wide by 1001 (Br_tgt) of obtaining the wide Bf_tgt of fine finishining Target Board and being calculated by the wide desired value correction of the 1st plate portion 1120.Among the step S1010-2, confirming current rolling number, is that N is individual consistent if rolling number is calculated with rolling number with predefined self adaptation amount, then gets into the self adaptation amount calculation process that begins from step S1010-3.Among the step S1010-3, the rolling counting of initialization.Among the step S1010-4,, calculate the wide self adaptation amount of roughing plate Br_comp, among the step S1010-5,, calculate adaptive gain γ according to computational methods based on formula (8) according to computational methods based on formula (27).Among the step S1010-6; According to the roughing plate wide self adaptation amount Br_comp that calculates by step S1010-4 with by the adaptive gain γ that step S1010-5 calculates, adopt the formula (27) in the wide desired value correction of the 2nd plate portion 1140 to calculate the wide correction Br ' of roughing Target Board _ comp.Among the step S1010-7, add the wide correction of roughing Target Board that calculates among the step S1010-6 on the roughing Target Board of in step S1010-1, obtaining wide 1001, it is wide by 1002 to calculate new roughing Target Board.Among the step S1010-7, adopt the roughing Target Board wide 1002 that calculates by step S1010-7 the gap command value that portion 1160 comes the molded breadth milling train to be set, thereby finish to calculate with the width milling train.

In addition; If rolling number is not enough N among the step S1010-2; Then do not get into self adaptation amount calculation process, and directly get into step S1010-7, sub-value γ on sub-value Br_comp and the adaptive gain on, the self adaptation amount wide by 1001 according to the roughing Target Board of obtaining by step S1010-1; It is wide by 1002 to calculate the roughing Target Board, finishes through step S1010-8 to calculate.

As described above, according to this embodiment, comprising: finished width dwindles the amount of inferring calculating part, and it infers and calculate the wide reductions of plate in the finishing mill; With the wide desired value correction of the 1st plate portion, it is wide that the fine finishining Target Board is revised in its output of adopting finished width to dwindle the amount of inferring calculating part.In addition, comprising: the wide real data collection of roughing plate portion, it collects the wide real data of plate of the wide meter of roughing discharging side plate; The wide real data collection of precision-machined plate portion, it collects the wide real data of plate of the wide meter of fine finishining discharging side plate; And finished width dwindles self adaptation amount calculating part; Its according to wide by the measured plate of the wide meter of roughing discharging side plate and by the measured plate of the wide meter of fine finishining discharging side plate the difference between wide infer the reduced width amount; Also comprise: the width milling train is provided with portion; It adopts the wide rolling model of plate to decide the control instruction of width milling train, and wherein the wide rolling model of this plate waits the plate of inferring the roughing mill exit side wide according to the plasticity information of the drafts of width milling train and roughing mill, rolling gap, steel; The wide self adaptation amount of roughing plate calculating part, the wide difference with between the detected corresponding plate of the wide meter of roughing discharging side plate is wide of its plate of being inferred out according to the wide rolling model of plate is come the model error of the wide rolling model of quantification plate; And the wide desired value correction of the 2nd plate portion, it adopts the output of the wide self adaptation amount of roughing plate calculating part to come the revise goal plate wide.

Further; Comprise that finished width dwindles self adaptation amount validity quantification portion; This finished width dwindles self adaptation amount validity quantification portion to each steel plate that is rolled recently; Obtain by the measured plate of the wide meter of roughing discharging side plate wide and by the measured plate of the wide meter of fine finishining discharging side plate the difference between wide, the correlation of each steel plate of this difference of quantification; Also comprise the wide self adaptation amount of roughing plate validity quantification portion; The wide self adaptation amount of this roughing plate validity quantification portion is to each steel plate that is rolled recently; Obtain by the measured plate of the wide meter of roughing discharging side plate plate wide and that the wide rolling model of plate is inferred out the difference between wide, the correlation of each steel plate of this difference of quantification.

In addition; According to this embodiment; Employing by the collected real data roughing discharging side plate of the wide meter of roughing discharging side plate wide and from the collected real data fine finishining discharging side plate of the wide meter of fine finishining discharging side plate the difference between wide is a real data reduced width amount; Revise the finished width that calculated in advance goes out and dwindle the amount of inferring, and then to adopt the quantification portion that the validity of real data reduced width amount is carried out quantification to revise this correction be that finished width dwindles the self adaptation amount.That is, in preset stage, infer the finished width reductions accurately, this presumed value is carried out high precision int by self-adaptive processing is online.Thus, can determine that the roughing Target Board after the optimal roughing is wide, to become Target Board wide so that the plate after the finish rolling is wide.In addition, because decision should realize the drafts in each passage of the width milling train that this roughing Target Board that is determined is wide, therefore can carry out the wide control of plate, and not rely on finish rolling.

In addition, owing to suitably set roughing plate wide instruction value, therefore can improve the wide precision of precision-machined plate.In addition, for various steel grades and the wide steel plate of plate, it is wide also to obtain high-precision plate.Its result can improve the yield rate of product, does not have excessive width, widths too small.

Claims (9)

1. the wide control device of the plate of a hot-rolling mill, to get into again by the continuous casting machine casting roughing mill by the slab of rolled material, with the wide Rack that becomes of edging mill control panel; Afterwards; Control makes by finishing mill the wide desired value that becomes of said plate by rolled material after rolling, it is characterized in that, comprising:

The wide forecast model of plate, preserve said slab width and the operation of rolling and rolling after the relation of said plate between wide by rolled material;

The wide portion of inferring of plate, according to the indicated value and the rolling information relevant with this slab that obtains from said hot-rolling mill of the width of said slab, the said plate by rolled material that adopts the wide forecast model of said plate to infer by finishing mill after rolling is wide;

The wide deviation accumulation of plate portion, to after being rolled by rolled material, accumulate said plate wide infer portion infer the result and rolling after the wide actual measured value of this plate by rolled material between deviation;

Self adaptation portion, based on the content correction of the wide deviation accumulation of this plate portion be rolled rolling after the wide desired value of the plate by rolled material; And

Preset control section is carried out computing through adopting the wide desired value of being revised by this self adaptation portion of said plate, thereby calculates and export the control instruction to said edging mill.

2. the wide control device of the plate of a hot-rolling mill, to get into again by the continuous casting machine casting roughing mill by the slab of rolled material, with the wide Rack that becomes of edging mill control panel; Afterwards; Control makes by finishing mill the wide desired value that becomes of said plate by rolled material after rolling, it is characterized in that, comprising:

The wide forecast model of plate, preserve said slab width and the operation of rolling and rolling after the relation of said plate between wide by rolled material;

Width of plate slab is inferred portion; According to the wide actual measured value of the plate by rolled material after rolling with obtain from said hot-rolling mill with this by the relevant rolling information of rolled material; The wide forecast model of said plate is carried out inverse operation, infer said by the width of the rolling preceding said slab of rolled material;

Width of plate slab deviation accumulation portion accumulates this width of plate slab and infers the deviation between the indicated value of the width of inferring result and said slab of portion;

Learning section is revised the indicated value of the width of said slab based on the content of this width of plate slab deviation accumulation portion; And

Preset control section is carried out computing through the width that adopts the said slab of being revised by this learning section, thus calculate and output be used for the plate after rolling by rolled material wide be made as desired value, to the control instruction of said edging mill.

3. the wide control device of the plate of a hot-rolling mill, to get into again by the continuous casting machine casting roughing mill by the slab of rolled material, with the wide Rack that becomes of edging mill control panel; Afterwards; Control makes by finishing mill the wide desired value that becomes of said plate by rolled material after rolling, it is characterized in that, comprising:

The wide forecast model of plate, preserve said slab width and the operation of rolling and rolling after the relation of said plate between wide by rolled material;

The wide portion of inferring of plate, according to the indicated value and the rolling information relevant with this slab that obtains from said hot-rolling mill of the width of said slab, the said plate by rolled material that adopts the wide forecast model of said plate to infer by said finishing mill after rolling is wide;

The wide deviation accumulation of plate portion, to after being rolled by rolled material, accumulate said plate wide infer portion infer the result and rolling after the wide actual measured value of this plate by rolled material between deviation;

Self adaptation portion, based on the content correction of the wide deviation accumulation of this plate portion be rolled rolling after the wide desired value of the plate by rolled material;

Width of plate slab is inferred portion; According to the wide actual measured value of the plate by rolled material after rolling with obtain from said hot-rolling mill with this by the relevant rolling information of rolled material; The wide forecast model of said plate is carried out inverse operation, infer this by the width of the rolling preceding slab of rolled material;

Width of plate slab deviation accumulation portion accumulates this width of plate slab and infers the deviation between the indicated value of the width of inferring result and said slab of portion;

Learning section is revised the indicated value of the width of said slab based on the content of this width of plate slab deviation accumulation portion; And

Preset control section; Some in the output of output through Selecting and Applying this learning section and said self adaptation portion carries out computing, thus calculate and output be used for the plate after rolling by rolled material wide be made as desired value, to the control instruction of said edging mill.

4. the wide control device of the plate of hot-rolling mill according to claim 3 is characterized in that,

Comprise switching part, after the output of the output of said learning section and said self adaptation portion is switched, export said preset control section to,

Rolling number after the casting that this switching part is obtained said continuous casting machine begins is the output that fixed value is selected learning section when following in this rolling number, selects the output of said self adaptation portion in the time of beyond this, and exports said preset control section to.

5. the wide control device of the plate of hot-rolling mill according to claim 3 is characterized in that,

Comprise switching part, after the output of the output of said learning section and said self adaptation portion is switched, export said preset control section to,

Rolling number after this switching part is obtained said continuous casting machine and carried out casting after die width changes and begin; In this rolling number is the output that fixed value is selected said learning section when following; Select the output of said self adaptation portion in the time of beyond this, and export said preset control section to.

6. the wide control device of the plate of hot-rolling mill according to claim 3 is characterized in that,

Comprise switching part, after the output of the output of said learning section and said self adaptation portion is switched, export said preset control section to,

The width that this switching part is judged the said slab that next time is rolling with recently rolling after the similitude of width of said slab; In this similitude is the output that fixed value is selected said learning section when following; Select the output of said self adaptation portion in the time of beyond this, and export said preset control section to.

7. according to the wide control device of plate of each described hot-rolling mill in claim 1, claim 3 to the claim 6; Wherein, Said self adaptation portion is employed in the wide deviation of plate that extracts from the wide deviation accumulation of said plate portion and multiply by the value that obtains behind the adaptive gain, calculate next time rolling by the correction of the wide desired value of plate of rolled material; And said preset control section adopts and utilizes the revised Target Board of output of this self adaptation portion wide, calculate and export be used to realize after rolling by the wide desired value of plate of rolled material, to the control instruction of said edging mill, it is characterized in that,

Comprise the adaptive gain calculating part, rolling by the size of the correlation of the wide deviation of plate of rolled material before and after obtaining according to the content of the wide deviation accumulation of said plate portion, decide said adaptive gain according to the size of this correlation.

8. the wide control device of the plate of hot-rolling mill according to claim 7 is characterized in that,

When said adaptive gain calculating part the correlation by the plate wide deviation of rolled material rolling in said front and back is big; Calculate big said adaptive gain; Rolling in said front and back by the correlation of the wide deviation of plate of rolled material hour, calculate little said adaptive gain.

9. the plate width controlling method of the wide control device of plate of a hot-rolling mill; To get into again by continuous casting machine casting roughing mill by the slab of rolled material; With the wide Rack that becomes of edging mill control panel, afterwards, control makes by finishing mill the wide setting that becomes of said plate by rolled material after rolling; It is characterized in that

Preserve said slab width and the operation of rolling and rolling after the relation of said plate between wide by rolled material,

According to the wide actual measured value of the plate by rolled material after rolling with obtain from said hot-rolling mill with this by the relevant rolling information of rolled material; To the width of said slab and the operation of rolling and rolling after the relation of this plate between wide by rolled material carry out inverse operation; Infer this by the width of the rolling preceding slab of rolled material

In the 1st form accumulation this infer the deviation between the indicated value of width of result and slab,

Adopt the indicated value and the rolling information relevant that obtains from said hot-rolling mill of the width of said slab with this slab; Infer slab width, the operation of rolling and rolling after this plate by rolled material between wide relation and by said finishing mill this plate after rolling by rolled material wide

To after rolling by rolled material, calculate the deviation between wide result of inferring of said plate and the wide actual measured value of plate, and be accumulated in the 2nd form,

Obtain said continuous casting machine casting beginning back or carry out the rolling number after die width changes,

When this rolling number is fixed value when following, the indicated value of the width of the slab that is rolled according to said the 1st table contents correction,

When this rolling number during greater than fixed value, the wide desired value of the plate by rolled material that is rolled according to said the 2nd table contents correction,

According to said correction result calculate and output be used for the plate after rolling by rolled material wide be controlled at setting, to the control instruction of said edging mill.

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