CN109877166A - A method of suitable for ultra-thin rolling strip steel convexity On-line Control - Google Patents
A method of suitable for ultra-thin rolling strip steel convexity On-line Control Download PDFInfo
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- CN109877166A CN109877166A CN201810588316.5A CN201810588316A CN109877166A CN 109877166 A CN109877166 A CN 109877166A CN 201810588316 A CN201810588316 A CN 201810588316A CN 109877166 A CN109877166 A CN 109877166A
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Abstract
The present invention provides a kind of line closed loop control methods of strip crown suitable for ultra-thin casting belt steel rolling process.The band convexity measured according to rolling-mill housing entrance and outlet side detection device, bending roller force correction value is calculated using the feedback controller of feedforward controller and prediction device with the micro- tracking of band, real-time control working-roller bending device, it realizes the convexity On-line Control in double ultra-thin casting strip steel mill process of casting roll, meets different steel grade grades, specification to the quality requirement of product convexity.
Description
Technical field
The present invention relates to a kind of strip crown line closed loop controls suitable for the rolling process of ultra-thin casting strip
Method.
Background technique
Ultra-thin casting strip, using two opposite casting rolls of direction of rotation as crystallizer, is used using liquid molten steel as raw material
Liquid molten steel directly produces the new technology of ultra-thin Cast Strip.Its main feature is that liquid metal is directly injected into the casting roll roll gap of rotation,
So that it is born pressure processing and plastic deformation while crystallization and freezing, completes from liquid molten steel to the forming of ultra-thin Cast Strip material
Hot rolling mill is being passed through in journey, ultra-thin Cast Strip produced, and the plastic processing formation for completing Cast Strip meets size needed for user
Band finished product is rolled in specification requirement.Which can produce the ultra-thin Cast Strip of 1.2~1.9mm and 0.8~1.6mm rolls band.
Rolling in band finished size specification requirement in addition to finished product thickness and width requirement required by downstream user, can also be right
It rolls the convexity with finished product to be required, i.e., claims with center thickness difference to rolling band edge 40mm position thickness.
Currently, the Crown control of hot-strip in hot-continuous-rolling strip steel production process, develops plurality of devices and method packet
It includes work roll bending, working roll roll shifting, intersect, or a variety of shape of working roll of exploitation, while being equipped with corresponding Crown control system
System, to meet the different Crown control requirements in same hot rolling unit.In the Crown control system of existing hot-continuous-rolling strip steel
In system, Crown control feedforward control scheme relies primarily on the model specification computational accuracy of process computer, or using inspection indirectly
Survey means determine that strip profile, specific method are then rolled by the way that the testing result of the roll-force of upstream stand, bending roller force to be input to
Machine loading roll gap shape computation model, is calculated the strip profile in the tandem mill frame exit under milling train loading roll gap, and makees
Foundation is adjusted for the convexity of downstream rack.In used crown feedback control system, by being located at milling train outlet port
Convexity deviation amount is calculated using proportional integration mode in convexity detection device, and differently distributes to each tandem mill
Frame realizes the closed-loop control of strip profile.
The matched steel strip thickness specification of institute is 1.5mm or 2.0mm in the hot-strip Crown control system developed at present
The above specification, since strip target trimmed size is thinner, Crown control difficulty is bigger.Meanwhile existing hot-strip convexity
Control system relies on series connection Continuous mill train, and used feed-forward control manner can not be suitable for the strip profile of singlestandmill
Control.
Patent document CN200710194281.9 (" crown control device of hot-rolling mill and its control method ") is disclosed
A kind of strip profile control method of Jill Sterkel milling train produces 2~10mm hot-strip by reciprocating multi- pass rolling,
This method is according to the difference of belt steel rolling passage, using convexity detection device before and after Jill Sterkel milling train, and sets per pass
Target convexity or locking convexity compare, and by the On-line Control alternately to feedover with feedback, realize the control of strip profile, but
The embodiment is used for the Jill Sterkel milling train of the reciprocating rolling of reversible multi-pass, and not in view of strip unit convexity changes institute
Caused flatness control, while also not considering in its feedback control since distance is made between executing agency and detection device
At lagging influence.Hot-strip convex degree control method disclosed in patent document JP62168608 is in hot tandem rolling mill inlet
Convexity detection device is set, and by adjusting entrance Crown control final products convexity, but the control method is used for the heat of multi-frame
Continuous mill train, the singlestandmill that double casting rolls produce ultra-thin Cast Strip is distinct with rolling.
Summary of the invention
The object of the present invention is to provide it is a kind of suitable for it is ultra-thin casting strip rolling process strip crown it is online
The method of closed-loop control, by being based on casting using rolling-mill housing entrance and outlet side Cast Strip center and edge thickness detection apparatus
Calculated result with Crown control system, using the feedback control of feedforward control and prediction device with the micro- tracking in Cast Strip, in real time
Control work roll bending control device realizes the ultra-thin casting of double casting rolls to meet different steel grade grades, requirement of the specification to convexity
Convexity On-line Control during belt steel rolling.
To achieve the goals above, the present invention is realized by scheme in detail below:
A method of suitable for ultra-thin rolling strip steel convexity On-line Control, in the plastic processing for metal casting band
Cast Strip thickness control of section, which is characterized in that including at least 1 rolling mill, inlet of rolling mill side Cast Strip center and edge thickness examine
Survey device, milling train outlet side Cast Strip center and edge thickness detection apparatus and Cast Strip Crown control system (S1).
Cast Strip Crown control system (S1) includes the following contents: Cast Strip convexity feedforward control unit (S10), Cast Strip convexity are anti-
It presents control unit (S20)；Cast Strip material property judging unit (S30).
Wherein, Cast Strip convexity feedforward control unit (S10), according to the measurement number of convexity detection device in Cast Strip at inlet of rolling mill
According to resultIt is input to material property judging unit (S30), and is exported according to material property judging unit (S30) as a result, rolling
Machine convexity feedforward compensation executing agency adjusting deviation Δ FFF, by the interior Cast Strip tracking module of Cast Strip convexity feedforward control unit (S10)
(S101) it is responsible for the tracking of Cast Strip convexity detection position, meets tracking condition when Cast Strip convexity detects position, be issued to working roll
Roller executing agency (WRB).
Cast Strip crown feedback control unit (S20), according to the measurement result of milling train exit Cast Strip convexity detection device
It is input to material property judging unit (S30), and is exported according to material property judging unit (S30) as a result, Cast Strip convexity is anti-
Feedback compensation deviation delta CFBTo Cast Strip feedback control prediction device module (S201), which uses Smith to estimate mode to disappear for output
Except the hysteresis quality of Cast Strip crown feedback control system is adjusted milling train crown feedback compensation executing agency inclined according to calculated result
Poor Δ FFBIt is issued to work roll bending executing agency (WRB).
Work roll bending executing agency (WRB) adjusting deviation Δ FFrIt is calculated according to the following formula:
ΔFFr=α Δ FFF+βΔFFB+γF
Wherein α, β, γ are respectively Cast Strip convexity feedforward, feedback control, working roll roll-force adjusting deviation correction factor, F
For operation roll of mill roll-force, it is calculated by material property judging unit (S30).
Cast Strip material property judging unit (S30), according to Cast Strip target finished product thickness specification, width at the inlet of rolling mill of Cast Strip
Specification, affiliated steel grade grade are input to Cast Strip physical parameter compensating module (S301), to determine that target control convexity is controlled in Cast Strip
Ctar, meanwhile, it is rolled according to being exported respectively by Cast Strip convexity feedforward control unit (S10) and Cast Strip crown feedback control unit (S20)
The measurement result of machine entrance, exit Cast Strip convexity detection deviceVia Cast Strip Crown control deviation computing module
(S302), the feedforward of Cast Strip convexity, feedback compensation deviation delta C is calculated in Cast Strip straightness computing module (S303)FF、ΔCFB, together
When Cast Strip convexity feedforward compensation deviation delta CFFThe feedforward of milling train convexity is calculated by Cast Strip convexity compensation calculation module (S304) again
Compensate executing agency's adjusting deviation Δ FFFAnd it exports to Cast Strip tracking module (S101)；And Cast Strip crown feedback compensates deviation delta
CFBIt then exports to Cast Strip feedback control prediction device module (S201).
Cast Strip convexity feedforward control unit (S10) includes Cast Strip tracking module (S101)；The module receives Cast Strip convexity and mends
Repay the output feed-forward regulation deviation delta F of computing module (S304)FF, when Cast Strip decision condition, by feed-forward regulation deviation delta FFFUnder
Being sent to work roll bending executing agency (WRB), it tracks decision condition as following formula:
lFFΔ l < ∑ v Δ t+vTWRB≤lFF
In formula, lFFFor milling train and inlet of rolling mill side Cast Strip center and edge thickness detection apparatus spacing, m；V is Cast Strip rolling
Speed, m/s.
Cast Strip crown feedback control unit (S20) includes Cast Strip feedback control prediction device module (S201), which uses
Smith estimates mode to eliminate the hysteresis quality of Cast Strip crown feedback control system, which receives Cast Strip straightness computing module
(S303) output Cast Strip crown feedback compensates deviation delta CFB, the work roll bending transmission function established is following formula:
The transmission function of milling train outlet side Cast Strip center and edge thickness detection apparatus is following formula:
In formula, TWRB、TCRespectively hydraulic working roll time constant, milling train outlet side Cast Strip center and edge Thickness sensitivity
Setup time constant, s.
Cast Strip convexity variable quantity and work roll bending adjust magnitude relation following formula:
ΔFFB=cFBΔCFB。
Feedback control system hysteresis factors τ can by Cast Strip mill speed, milling train and milling train outlet side Cast Strip center and
Edge thickness detection apparatus spacing is calculated by following formula:
In formula, lFBFor milling train and milling train outlet side Cast Strip center and edge thickness detection apparatus spacing, m；V is Cast Strip rolling
Speed, m/s.
Feedback control system object control model transfer function is following formula:
Above-mentioned work roll bending, which is adjusted, influences coefficient cFBBy Cast Strip physical parameter compensating module (S301) module according to Cast Strip
Affiliated steel grade grade, specification determine.
Cast Strip material property judging unit (S30) includes Cast Strip physical parameter compensating module (S301), Cast Strip Crown control
Deviation computing module (S302), Cast Strip straightness computing module (S303), Cast Strip convexity compensation calculation module (S304) composition.
Wherein Cast Strip physical parameter compensating module (S301) is advised according to Cast Strip target finished product thickness at the inlet of rolling mill of Cast Strip
Lattice, width specifications, affiliated steel grade grade determine.
Wherein Cast Strip Crown control deviation computing module (S302), according to by Cast Strip convexity feedforward control unit (S10) and
The measurement result of inlet of rolling mill, exit Cast Strip convexity detection device that Cast Strip crown feedback control unit (S20) inputs respectivelyIt is calculated by Cast Strip Crown control deviation computing module (S302) according to formula following formula:
Wherein Cast Strip straightness computing module (S303) mainly serves for ensuring the flatness control of Cast Strip, prevents Cast Strip from rolling
Shape wave in the process generates, i.e., exports Cast Strip Crown control deviation computing module (S302) calculated result to Cast Strip straightness meter
It calculates module (S303), is determined in the following manner:
As Δ C'FF(ΔC'FB) meet relationship:When, Cast Strip convexity
(feedback) compensation deviation that feedovers is Δ CFF=Δ C'FF(ΔCFB=Δ C'FB)；
As Δ C'FF(ΔC'FB) meet relationship:When, Cast Strip convexity feedforward (feedback) is mended
Repaying deviation is
As Δ C'FF(ΔC'FB) meet relationship:When, Cast Strip convexity feedforward (feedback) is mended
Repaying deviation is
Wherein Cast Strip convexity compensation calculation module (S304), according to formulaMilling train is calculated
Convexity feedforward compensation executing agency adjusting deviation Δ FFF。
Beneficial technical effect
The strip crown line closed loop control provided by the invention suitable for the rolling process of ultra-thin casting strip
Method, compared with prior art, beneficial effects of the present invention include at least:
1, the method for strip crown line closed loop of the invention control, utilizes rolling-mill housing entrance and outlet side Cast Strip center
And edge thickness detection apparatus, based on the calculated result of Cast Strip Crown control system, the calculated result of Cast Strip Crown control system
Output, is adjusted work roll bending control device, in real time to meet different steel grade grades, requirement of the specification to convexity；
2, the method for strip crown line closed loop control of the invention, be applicable to hot rolling singlestandmill production 1.2~
The ultra-thin specification Cast Strip 1.9mm also can guarantee Cast Strip flatness control while meeting the Crown control requirement of target Cast Strip；
3, the method for strip crown line closed loop of the invention control, is feedovered and feedback integration control mode using convexity,
It precisely tracked by the feedforward of rolled piece strip micro- tracking realization Cast Strip, feed back prediction device elimination convexity closed loop lagging influence, realized
Convexity On-line Control in double ultra-thin casting strip steel mill process of casting roll.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the embodiment of the present invention, the attached drawing of embodiment will be made simply below
It introduces.It should be evident that the accompanying drawings in the following description merely relates to some embodiments of the present invention, rather than to limit of the invention
System.
Fig. 1 is the apparatus and control flow chart for indicating embodiment of the present invention 1.
Fig. 2 is the control flow chart for indicating embodiment of the present invention 1.
1 is Cast Strip
2 be inlet of rolling mill side Cast Strip center and edge thickness detection apparatus
3 be milling train outlet side Cast Strip center and edge thickness detection apparatus
4 be rolling-mill housing
5 be inlet of rolling mill side
6 be milling train outlet side
7 be work roll bending executing agency (WRB)
8 Cast Strip Crown control systems
9 Cast Strip feedback control prediction device modules (S301)
(S10) Cast Strip convexity feedforward control unit
(S101) Cast Strip tracking module
(S20) Cast Strip crown feedback control unit
(S201) Cast Strip feedback control prediction device module
(S30) material property judging unit
(S301) Cast Strip physical parameter compensating module
(S302) Cast Strip Crown control deviation computing module
(S303) Cast Strip straightness computing module
(S304) Cast Strip convexity compensation calculation module
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be to the embodiment of the present invention
Technical solution is clearly and completely described.Obviously, described embodiment is a part of the embodiments of the present invention, rather than
Whole embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are without creative work
Under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Unless otherwise defined, technical term or scientific term used in the disclosure are should be in fields of the present invention
The ordinary meaning that personage with general technical ability is understood.
Fig. 1 is that the present invention is to realize ultra-thin rolling strip steel convexity On-Line Control Method schematic diagram, rolling equipment of the invention
Including 1 milling train, inlet of rolling mill, outlet side casting band center and edge thickness detection apparatus, work roll bending control device with
And Cast Strip Crown control system.
Control method according to the present invention comprises the steps of:
Step 1: hot melt state molten steel forms ultra-thin Cast Strip i.e. Cast Strip 1 via double casting rolls, and head passes through rack 4 and smoothly rolls up
It takes after building and effectively depress there are milling train, the unlatching of Cast Strip Crown control system 8；When Cast Strip tail portion leave double casting rolls and milling train without
When effectively depressing, stop Cast Strip Crown control system 8.
Step 2: Cast Strip convexity feedforward control unit (S10) receives current time inlet of rolling mill and surveys Cast Strip band center and edge
Thickness detection apparatus is as a result, be calculated Cast Strip entrance feedforward convex value by formula (1)
Meanwhile Cast Strip crown feedback control unit (S20) receives the outlet of current time milling train and surveys Cast Strip band center and edge
Thickness detection apparatus is as a result, be calculated Cast Strip exit feedback convex value by formula (2)
Step 3: Cast Strip physical parameter compensating module (S301) in material property judging unit (S30) is according to Cast Strip target
Finished product thickness specification, width specifications, affiliated steel grade grade determine target control convexity Ctar, affiliated steel grade grade in this example
Q235B, related On-line Control major parameter value are as shown in table 1:
The ultra-thin rolling strip steel convexity On-line Control embodiment major parameter of table 1
Step 4: step 2 being obtained into result and is input to Cast Strip Crown control drift gage in material property judging unit (S30)
It calculates module (S302), Cast Strip Crown control deviation is calculated according to formula (3), (4):
Step 5: step 4 calculated result being input to Cast Strip straightness computing module (S303), is passed through in straightness " dead zone "
Determining type, i.e. (5), (6), (7) are determined, when Cast Strip convexity correction amount be located at " dead zone " it is interior when, Cast Strip straightness is good；
As Δ C'FF(ΔC'FB) when meeting relational expression (5),
0.1012925 < Δ C'FF(ΔC'FB) < 0.1015646 (5)
Cast Strip convexity feedforward (feedback) compensation deviation is Δ CFF=Δ C'FF(ΔCFB=Δ C'FB)；
As Δ C'FF(ΔC'FB) when meeting relational expression (6),
ΔC'FF(ΔC'FB)≥0.1015646 (6)
Cast Strip convexity feedforward (feedback) compensation deviation is Δ CFF(ΔCFB)=0.1015646；
As Δ C'FF(ΔC'FB) when meeting relational expression (7),
ΔC'FF(ΔC'FB)≤0.1012925 (7)
Cast Strip convexity feedforward (feedback) compensation deviation is Δ CFF(ΔCFB)=0.1012925；
Above-mentioned formula (5), (6), λ, m in (7),For Cast Strip straightness " dead zone " coefficient of determination；σ is Cast Strip tension, and E is casting
Band Young's modulus 2.1e+5N/m2；
Step 6: by the Cast Strip convexity feedforward compensation deviation delta C in step 5 calculated resultFFIt is input to Cast Strip convexity compensation meter
It calculates module (S304), milling train convexity feedforward compensation executing agency adjusting deviation, i.e. work roll bending power is calculated according to formula (8)
Feed-forward regulation deviation delta FFF:
Step 7: by step 6 calculated result feed-forward regulation deviation delta FFF, it is input to Cast Strip feedforward tracking module (S101), when
When Cast Strip meets formula (9), by feed-forward regulation deviation delta FFFIt is issued to work roll bending executing agency (WRB):
lFFΔ l < ∑ v Δ t+vTWRB≤lFF (9)
L in formulaFFFor milling train and inlet of rolling mill side Cast Strip center and edge thickness detection apparatus spacing, m；V is Cast Strip rolling
Speed, m/s；
Step 8: the Cast Strip crown feedback in step 5 calculated result is compensated into deviation delta CFBIt is pre- to be input to Cast Strip feedback control
Estimate device module (S201), using Smith predictor, feedback control system Controlling model transmission function formula is formula (10)
Inertia time constant in exampleBetween 1.225~3.06s, hydraulic working roll time constant is 0.01s, is rolled
Machine and milling train outlet side Cast Strip center and edge thickness detection apparatus spacing are s=2.45m, and Cast Strip mill speed value range is
0.8~2.0m/s, therefore Cast Strip feedback control system target transfer function are as follows:
Milling train crown feedback compensation executing agency's adjusting deviation Δ F is calculatedFB, it is issued to work roll bending executing agency
(WRB), wherein final work roll bending executing agency (WRB) adjusting deviation Δ FFrAccording to milling train convexity feedforward compensation executing agency
Adjusting deviation Δ FFF, milling train crown feedback compensate executing agency's adjusting deviation Δ FFBIt is calculated by following formula:
ΔFFr=α Δ FFF+βΔFFB+γF (12)
The above is only exemplary embodiment of the invention, protection scope and is not intended to limit the present invention, this hair
Bright protection scope is determined by the attached claims.
Claims (5)
1. a kind of method suitable for ultra-thin rolling strip steel convexity On-line Control, in the plastic processing for metal casting band
Cast Strip thickness control of section, characterized by comprising:
At least 1 rolling mill, inlet of rolling mill side Cast Strip center and edge thickness detection apparatus, milling train outlet side Cast Strip center and edge
Thickness detection apparatus and Cast Strip Crown control system (S1)；
The Cast Strip Crown control system (S1) includes:
Cast Strip convexity feedforward control unit (S10)；
Cast Strip crown feedback control unit (S20)；
Cast Strip material property judging unit (S30).
2. the method according to claim 1 suitable for ultra-thin rolling strip steel convexity On-line Control, it is characterised in that:
Cast Strip convexity feedforward control unit (S10), according to the determination data result of convexity detection device in Cast Strip at inlet of rolling mill
It is input to material property judging unit (S30), and is exported according to material property judging unit (S30) as a result, i.e. before milling train convexity
Feedback compensation executing agency's adjusting deviation Δ FFF, negative by the interior Cast Strip tracking module (S101) of Cast Strip convexity feedforward control unit (S10)
The tracking for blaming Cast Strip convexity detection position meets tracking condition when Cast Strip convexity detects position, is issued to work roll bending execution
Mechanism (WRB)；
Cast Strip crown feedback control unit (S20), according to the measurement result of milling train exit Cast Strip convexity detection deviceInput
It exports to material property judging unit (S30), and according to material property judging unit (S30) as a result, Cast Strip crown feedback is mended
Repay deviation delta CFBTo Cast Strip feedback control prediction device module (S201), which uses Smith to estimate mode to eliminate casting for output
Milling train crown feedback is compensated executing agency's adjusting deviation Δ according to calculated result by the hysteresis quality with crown feedback control system
FFBIt is issued to work roll bending executing agency (WRB)；
Work roll bending executing agency (WRB) the adjusting deviation Δ FFrIt is calculated according to the following formula:
ΔFFr=α Δ FFF+βΔFFB+γF
Wherein α, β, γ are respectively Cast Strip convexity feedforward, feedback control, working roll roll-force adjusting deviation correction factor, and F is to roll
Machine working roll roll-force is calculated by material property judging unit (S30)；
Cast Strip material property judging unit (S30) is advised according to Cast Strip target finished product thickness specification, width at the inlet of rolling mill of Cast Strip
Lattice, affiliated steel grade grade are input to Cast Strip physical parameter compensating module (S301), to determine that target control convexity C is controlled in Cast Striptar,
Meanwhile entering according to milling train is exported respectively by Cast Strip convexity feedforward control unit (S10) and Cast Strip crown feedback control unit (S20)
The measurement result of mouth, exit Cast Strip convexity detection deviceVia Cast Strip Crown control deviation computing module
(S302), the feedforward of Cast Strip convexity, feedback compensation deviation delta C is calculated in Cast Strip straightness computing module (S303)FF、ΔCFB, together
When Cast Strip convexity feedforward compensation deviation delta CFFThe feedforward of milling train convexity is calculated by Cast Strip convexity compensation calculation module (S304) again
Compensate executing agency's adjusting deviation Δ FFFAnd it exports to Cast Strip tracking module (S101)；And Cast Strip crown feedback compensates deviation delta
CFBIt then exports to Cast Strip feedback control prediction device module (S201).
3. the method according to claim 1 or 2 suitable for ultra-thin rolling strip steel convexity On-line Control, it is characterised in that:
Cast Strip convexity feedforward control unit (S10) includes Cast Strip tracking module (S101)；
Cast Strip tracking module (S101) receives the output feed-forward regulation deviation delta F of Cast Strip convexity compensation calculation module (S304)FF, when
When the decision condition of Cast Strip, by feed-forward regulation deviation delta FFFBeing issued to work roll bending executing agency (WRB), it tracks decision condition
For following formula:
lFFΔ l < ∑ v Δ t+vTWRB≤lFF
In formula:
lFFFor milling train and inlet of rolling mill side Cast Strip center and edge thickness detection apparatus spacing, m；V is Cast Strip mill speed, m/s.
4. the method according to claim 1 or 2 suitable for ultra-thin rolling strip steel convexity On-line Control, it is characterised in that:
Cast Strip crown feedback control unit (S20) includes Cast Strip feedback control prediction device module (S201)；
Cast Strip feedback control prediction device module (S201) uses Smith to estimate mode to eliminate Cast Strip crown feedback control system
Hysteresis quality, the output Cast Strip crown feedback which receives Cast Strip straightness computing module (S303) compensate deviation delta CFB, built
Vertical work roll bending transmission function is following formula:
The transmission function of milling train outlet side Cast Strip center and edge thickness detection apparatus is following formula:
In formula:
TWRB、TCRespectively hydraulic working roll time constant, milling train outlet side Cast Strip center and edge thickness detection apparatus time are normal
Number, s；
Cast Strip convexity variable quantity and work roll bending adjust magnitude relation following formula:
ΔFFB=cFBΔCFB
Feedback control system hysteresis factors τ can pass through Cast Strip mill speed, milling train and milling train outlet side Cast Strip center and edge
Thickness detection apparatus spacing is calculated by following formula:
In formula:
lFBFor milling train and milling train outlet side Cast Strip center and edge thickness detection apparatus spacing, m；V is Cast Strip mill speed, m/s；
Feedback control system object control model transfer function is following formula:
Above-mentioned work roll bending, which is adjusted, influences coefficient cFBAs Cast Strip physical parameter compensating module (S301) module according to belonging to Cast Strip
Steel grade grade, specification determine.
5. the method according to claim 1 or 2 suitable for ultra-thin rolling strip steel convexity On-line Control, it is characterised in that:
Cast Strip material property judging unit (S30) includes Cast Strip physical parameter compensating module (S301), Cast Strip Crown control deviation
Computing module (S302), Cast Strip straightness computing module (S303), Cast Strip convexity compensation calculation module (S304) composition；
Cast Strip physical parameter compensating module (S301) is advised according to Cast Strip target finished product thickness specification, width at the inlet of rolling mill of Cast Strip
Lattice, affiliated steel grade grade determine；
Cast Strip Crown control deviation computing module (S302), according to by Cast Strip convexity feedforward control unit (S10) and Cast Strip convexity
The measurement result of inlet of rolling mill, exit Cast Strip convexity detection device that feedback control unit (S20) inputs respectivelyIt is calculated by Cast Strip Crown control deviation computing module (S302) according to formula following formula:
Cast Strip straightness computing module (S303) mainly serves for ensuring the flatness control of Cast Strip, prevents in the operation of rolling of Cast Strip
Shape wave generates, i.e., exports Cast Strip Crown control deviation computing module (S302) calculated result to Cast Strip straightness computing module
(S303), determined in the following manner:
As Δ C 'FF(ΔC′FB) meet relationship:When, the feedforward of Cast Strip convexity
It is Δ C that (feedback), which compensates deviation,FF=Δ C 'FF(ΔCFB=Δ C 'FB)；
As Δ C 'FF(ΔC′FB) meet relationship:When, Cast Strip convexity feedovers (feedback) compensation partially
Difference is
As Δ C 'FF(ΔC′FB) meet relationship:When, Cast Strip convexity feedovers (feedback) compensation partially
Difference is
Cast Strip convexity compensation calculation module (S304), according to formulaThe feedforward of milling train convexity is calculated
Compensate executing agency's adjusting deviation Δ FFF。
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Cited By (2)
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| CN113927247A (en) * | 2021-08-30 | 2022-01-14 | 浙江威罗德汽配股份有限公司 | Heat insulation partition plate of automobile exhaust pipe and preparation method thereof |
| CN115971436A (en) * | 2023-03-16 | 2023-04-18 | 张家港中美超薄带科技有限公司 | Method for controlling convexity of thin strip steel |
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| CN103433295A (en) * | 2013-08-05 | 2013-12-11 | 苏州有色金属研究院有限公司 | Method for controlling convexity of single-rack double-coiler aluminum hot mill |
| CN105436211A (en) * | 2015-12-17 | 2016-03-30 | 太原重工股份有限公司 | Shape closed-loop feedback control method for single-stand reversing six-roller rolling unit |
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| CN115971436A (en) * | 2023-03-16 | 2023-04-18 | 张家港中美超薄带科技有限公司 | Method for controlling convexity of thin strip steel |
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