CN106886150A - A kind of whole grinding autocontrol method of open circuit cement joint half and system based on C# - Google Patents
A kind of whole grinding autocontrol method of open circuit cement joint half and system based on C# Download PDFInfo
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- CN106886150A CN106886150A CN201710116853.5A CN201710116853A CN106886150A CN 106886150 A CN106886150 A CN 106886150A CN 201710116853 A CN201710116853 A CN 201710116853A CN 106886150 A CN106886150 A CN 106886150A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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Abstract
The invention discloses a kind of whole grinding autocontrol method of open circuit cement joint half based on C#, specifically include：1), using C#, communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；2) the grain size parameter Real-time Feedback that, online Particle Size Analyzer will be detected gives engineering station, judges for its operating mode to grinding system；3), engineering station carries out real-time control to grinding system.Present invention additionally comprises using a kind of control system of the whole grinding autocontrol method of open circuit cement joint half based on C#.
Description
Technical field
The present invention relates to automatic control technology field, specifically a kind of whole grinding of open circuit cement joint half based on C#
Autocontrol method and system.
Background technology
The control major part of the closed circuit cement Joint grinding system of most domestic is by the manually operated completion of operating personnel.
The features such as open circuit cement half final grinding system of joint has purely retarded, big inertia, multivariable, close coupling and model time-varying, increases
The manually operated difficulty of grinding machine is added.Additionally, in the closed circuit cement Joint grinding system course of work, block up mill, full mill, empty mill,
Superfined flyash happens occasionally with going out to grind the phenomenons such as elevator overload, and this not only influences normal production, reduces manufacture of cement
Efficiency, reduces the service life of equipment component, more increases the consumption of electric energy.
The content of the invention
Combine half whole grinding autocontrol method it is an object of the invention to provide a kind of open circuit cement based on C# and be
System, it is short for solving the problems, such as existing manufacture of cement inefficiency, service life of equipment.
The technical scheme adopted by the invention to solve the technical problem is that：A kind of whole powder of open circuit cement joint half based on C#
Mill autocontrol method, it is characterized in that, specifically include：
1), using C#, communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；
2) the grain size parameter Real-time Feedback that, online Particle Size Analyzer will be detected gives engineering station, for it to grinding system
Operating mode is judged；
3), engineering station carries out real-time control to grinding system.
Further, engineering station grinding system is carried out real-time control include back powder amount control,<The control of 3um granularities content,
3-32um granularities content is controlled；
The control process of the Hui Fenliang includes：
11), it is input into mill amount desired value；
12), as | e |>During ε, cold wind valve opening is controlled using Bang-Bang；As | e |<During ε, cold blast sliding valve is controlled using DMC
Aperture, makes the Hui Fenliang of system be in normal range (NR)；
13), enter to grind the Hui Fenliang of weigher real-time acquisition system, feed back to input, realize feedback control；
It is described<The control process of 3um granularity contents includes：
21), it is input into<3um granularity content desired values；
22), as | e |>During ε, using Bang-Bang control mill tail rotation speed of fan；As | e | ＜ ε, control to grind using DMC
Tail rotation speed of fan；
23), online Particle Size Analyzer online acquisition<3um granularity contents, feed back to input, realize feedback control；
The control process of the 3-32um granularities content includes：
31) 3-32um granularity content desired values, are input into；
32), as | e | ＞ ε, powder concentrator rotating speed is controlled using Bang-Bang；As | e | ＜ ε, powder is selected using DMC controls
Machine rotating speed；
33), online Particle Size Analyzer online acquisition 3-32um granularity contents, feed back to input, realize feedback control.
Further, realize that DMC controls are specifically included：
1), forecast model；
2), rolling optimization；
3), feedback compensation.
Further, detailed process 1) is：Model Distinguish is carried out to controlled device using least square, from controlled device
Step response set out, use coefficient of dynamics a1,a2,…,apCarry out descriptive model, by the ratio and sumproperties of linear system, in k
Moment, it is assumed that input is constant, and the predicted state initial to following N number of moment isIf being carved with M during k
Increment Delta u (k) ... Δ u (k+M-1) acts on controlled device, then the output valve at system following each moment is：
In formula,It is the output valve at following certain moment, p is the time domain length of model, apIt is close enough stable state
The coefficient of value, ai-j+1It is the i-th-j+1 coefficient of dynamics, Δ u (k+j-1) is kth+j-1 increment,Represent controlled output increments of the i from j-1 to M；
2) detailed process is：The following P output predicted value at moment of predictionClose to desired value w (k+i), i
, there is no too big fluctuation to make increment Delta u (k) in=1 ... P, set the optimal cost characteristic index function at k moment as：
In formula, qi、rjIt is weight coefficient, represents respectively to the tracking error of control system and system control amount is suppressed
Degree；Represent suppression of the performance index function J to output increment；Represent suppression of the performance index function J to control input；
It is assumed that input and output amount is matrix form, then system outputWith increment Delta uMRelation can be expressed as：
Wherein,
A is dynamic matrix, is the coefficient a responded by system stepiThe matrix of composition；For system is exported,For
System is input into, Δ uMK () is increment；
3) detailed process is：To reduce interference of the production process scene various factors to controlling, system is fed back
Correction, reduces the output error of model open loop, introduces output error and is：
Can use to qiThe mode of weighting is modified：
Wherein,It is the output premeasuring of k+1 time corrections；E (k+1) represents the pre- of k+1 moment
Survey the output difference of output and actual k+1 moment；Represent the prediction output at k moment；H represents that coefficient, value [0,1] are gathered in examination.
Further, Bang-Bang control especially by：
E (k)=Vr-Ve；(formula 9)
In formula, VrIt is actual measured value, VeIt is desired value, uBBFor the increment of Bang-Bang controllers is exported；ε is deviation
Threshold value；ubbIt is adjusting step, e (k) represents system output errors.
A kind of whole grinding automatic control system of open circuit cement joint half based on C#, using a kind of open circuit cement based on C#
The whole grinding autocontrol method of joint half, it is characterized in that, including DCS system, online Particle Size Analyzer and engineering station；By OPC
Communication is completed to DCS system, the data interaction of online Particle Size Analyzer；The grain size parameter reality that online Particle Size Analyzer will be detected
When feed back to engineering station, judge for its operating mode to grinding system；Engineering station carries out real-time control to grinding system.
Further, grinding system include back powder amount loop control system,<3um granularity contents loop control system, 3-
32um granularity content loop control systems；
The described powder amount loop control system that returns includes：As the Hui Fenliang for combining the collection of half final grinding system from open circuit cement
During with the deviation of desired value without departing from 110 ± 5t/h of threshold value, cold wind valve opening is finely adjusted using DMC controls；When from open circuit
When the deviation of Hui Fenliang and desired value that cement combines the collection of half final grinding system exceeds threshold value, control to adjust using Bang-Bang
Whole cold wind valve opening, makes Hui Fenliang rapidly return back to normal range (NR)；
Described<3um granularity content loop control systems include：When online Particle Size Analyzer<3um granularity content detections
When value is without departing from control targe value 11.5 ± 0.5%, powder concentrator rotating speed is finely adjusted using DMC controls；When the inspection of granularity content
When measured value exceeds control targe value 11.5 ± 0.5%, using Bang-Bang control adjustment cold wind valve openings, make Hui Fenliang rapid
Return to normal range (NR)；
Described 3-32um granularity content loop control systems include：When the 3-32um granularity contents of online Particle Size Analyzer
When detected value is without departing from control targe value 57.5 ± 1.0%, powder concentrator rotating speed is finely adjusted using DMC controls；When granularity contains
When detection values exceed control targe value 57.5 ± 1.0%, using Bang-Bang control adjustment cold wind valve openings, make Hui Fenliang
Rapidly return back to normal range (NR).
The beneficial effects of the invention are as follows：
1st, the method that the system is combined using dynamic matrix control (DMC) and Bang-Bang controls, by outstanding operator
The means of member's operation thinking and solve problem are dissolved into system, and grinding system can be controlled instead of operating personnel effectively.
2nd, present invention solution three control loops of decoupling, three loops are separate, and grinding system is acted synergistically on again, can have
The respective performance indications of control of effect.
3rd, solve open circuit cement at present and combine half final grinding system and manually control that the manufacture of cement efficiency brought is low to ask
Topic, extends the service life of equipment, improves finished cement quality.
Brief description of the drawings
Fig. 1 is open circuit cement joint semi-finish grinding process figure of the invention；
Fig. 2 is control system figure of the invention；
Fig. 3 is half final grinding system automatic control structure schematic diagram of open circuit joint of the invention；
Fig. 4 returns powder amount loop model inputoutput data for the present invention；
Fig. 5 returns powder amount loop model identification result figure for the present invention；
Fig. 6 returns powder amount loop DMC control simulation results for the present invention；
Fig. 7 returns powder amount circuit controls design sketch for the present invention；
Fig. 8 is the present invention<3um granularity content loop model inputoutput data figures；
Fig. 9 is the present invention<3um granularity content loop model identification results；
Figure 10 is the present invention<3um granularity contents loop DMC simulation result figures；
Figure 11 was Hui Fenliang of the present invention in 320 seconds<3um granularity contents loop DMC simulation result figures；
Figure 12 is 3-32um granularities content loop of the present invention inputoutput data
Figure 13 is 3-32um granularities content loop model identification result of the present invention；
Figure 14 is 3-32um granularities content loop of the present invention DMC simulation results；
Figure 15 is Hui Fenliang of the present invention 3-32um granularities content loop DMC simulation results in 700 seconds；
In figure：1. current stabilization storehouse, 2. roll squeezer, 3. elevator, 4.V type powder concentrators, 5. powder concentrator, 6. cold blast sliding valve, 7. time powder
Weighing balance, 8. ball mill, 9. main exhaust fan, 10. grinds a tail wind machine 11. and goes out to grind elevator, 12. skewed slots, 13. dust-precipitators, and 14. is online
Particle Size Analyzer.
Specific embodiment
The manufacturing process of current cement is, as shown in figure 1, first caching material through current stabilization storehouse 1 according to certain proportioning
Roll squeezer 2 is flowed into afterwards, and material carries out classification and breaks up through V-type powder concentrator 4 after roll-in, and the underproof boosted machine 3 of material send again
To roll squeezer 2, qualified material enters powder concentrator 5.Superfine powder enters to dust-precipitator 13 by main exhaust fan 9 under the effect of cold blast sliding valve 6；
Thicker material passes through back powder weighing balance 7 and enters ball mill 8 under the effect of powder concentrator 5.Material after the grinding of ball mill 8, receive by fine powder
Mill a tail wind machine 10 is acted on into dust-precipitator 13；Meal mixes through online grain through going out to grind the equipment such as elevator 11, skewed slot 12 with fine powder
Storage is put in storage after the analysis of degree 14, as being finished cement.
As shown in Fig. 2 combining the cement life that half final grinding system manually controls to bring to solve open circuit cement at present
The low problem of efficiency is produced, the service life of equipment is extended, finished cement quality is improve, C# is based on the invention provides one kind
The whole grinding autocontrol method of open circuit cement joint half, specifically include：
1), using C#, communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；
2) the grain size parameter Real-time Feedback that, online Particle Size Analyzer will be detected gives engineering station, for it to grinding system
Operating mode is judged；
3), engineering station carries out real-time control to grinding system.
As shown in figure 3, the present invention solves 3 control loops of decoupling, engineering station carries out real-time control to grinding system, including
Hui Fenliang controls,<The control of 3um granularities content, the control of 3-32um granularities content；
The control process of Hui Fenliang includes：
11), it is input into mill amount desired value；
12), as | e | ＞ ε, cold wind valve opening is controlled using Bang-Bang；As | e | ＜ ε, cold wind is controlled using DMC
Valve opening, makes the Hui Fenliang of system be in normal range (NR)；
13), enter to grind the Hui Fenliang of weigher real-time acquisition system, feed back to input, realize feedback control；
<The control process of 3um granularity contents includes：
21), it is input into<3um granularity content desired values；
22), as | e | ＞ ε, using Bang-Bang control mill tail rotation speed of fan；As | e | ＜ ε, control to grind using DMC
Tail rotation speed of fan；
23), online Particle Size Analyzer online acquisition<3um granularity contents, feed back to input, realize feedback control；
The control process of 3-32um granularity contents includes：
31) 3-32um granularity content desired values, are input into；
32), as | e | ＞ ε, powder concentrator rotating speed is controlled using Bang-Bang；As | e | ＜ ε, powder is selected using DMC controls
Machine rotating speed；
33), online Particle Size Analyzer online acquisition 3-32um granularity contents, feed back to input, realize feedback control.
Realize that DMC controls are specifically included：
1), forecast model.Model Distinguish is carried out to controlled device using least square, is gone out from the step response of controlled device
Hair, uses coefficient of dynamics a1,a2,…,apCarry out descriptive model, by the ratio and sumproperties of linear system, at the k moment, it is assumed that input
Constant, the predicted state initial to following N number of moment isIf being carved with M increment Delta u (k) during k ...
Δ u (k+M-1) acts on controlled device, then the output valve at system following each moment is：
In formula,It is the output valve at following certain moment, p is the time domain length of model, apIt is close enough stable state
The coefficient of value, ai-j+1It is the i-th-j+1 coefficient of dynamics, Δ u (k+j-1) is kth+j-1 increment,Represent controlled output increments of the i from j-1 to M.
2), rolling optimization.The following P output predicted value at moment of predictionClose to desired value w (k+i), i=
, there is no too big fluctuation to make increment Delta u (k) in 1 ... P, set the optimal cost characteristic index function at k moment as：
In formula, qi、rjIt is weight coefficient, represents respectively to the tracking error of control system and system control amount is suppressed
Degree；Represent suppression of the performance index function J to output increment；Represent suppression of the performance index function J to control input；
It is assumed that input and output amount is matrix form, then system outputWith increment Delta uMRelation can be expressed as：
Wherein,
A is dynamic matrix, is the coefficient a responded by system stepiThe matrix of composition；For system is exported,For
System is input into, Δ uMK () is increment.
3), feedback compensation.To reduce interference of the production process scene various factors to controlling, feedback school is carried out to system
Just, the output error of model open loop is reduced, introducing output error is：
Can use to qiThe mode of weighting is modified：
Wherein,It is the output premeasuring of k+1 time corrections；E (k+1) represents the k+1 moment
Prediction output and the output difference at actual k+1 moment；Represent the prediction output at k moment；H represents that coefficient is gathered in examination, value [0,
1]。
Bang-Bang control especially by：
E (k)=Vr-Ve；(formula 9)
In formula, VrIt is actual measured value, VeIt is desired value, uBBFor the increment of Bang-Bang controllers is exported；ε is deviation
Threshold value；ubbIt is adjusting step, e (k) represents system output errors.
A kind of whole grinding automatic control system of open circuit cement joint half based on C#, including DCS system, online grain size analysis
Instrument and engineering station；Communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；Online Particle Size Analyzer will
The grain size parameter Real-time Feedback for detecting gives engineering station, judges for its operating mode to grinding system；Engineering station is to grinding system
System carries out real-time control.
Grinding system include back powder amount loop control system,<3um granularity contents loop control system, 3-32um granularities contain
Amount loop control system；
Returning powder amount loop control system includes：As the Hui Fenliang and expectation that combine the collection of half final grinding system from open circuit cement
When the deviation of value is without departing from 110 ± 5t/h of threshold value, cold wind valve opening is finely adjusted using DMC controls；Join when from open circuit cement
When the deviation of the Hui Fenliang and desired value that close the collection of half final grinding system exceeds threshold value, using Bang-Bang control adjustment cold wind
Valve opening, makes Hui Fenliang rapidly return back to normal range (NR)；
<3um granularity content loop control systems include：When online Particle Size Analyzer<3um granularity content detection values do not surpass
When going out control targe value 11.5 ± 0.5%, powder concentrator rotating speed is finely adjusted using DMC controls；When granularity content detection value is super
When going out control targe value 11.5 ± 0.5%, using Bang-Bang control adjustment cold wind valve openings, Hui Fenliang is set to rapidly return back to just
Normal scope；
3-32um granularity content loop control systems include：When the 3-32um granularity content detection values of online Particle Size Analyzer
During without departing from control targe value 57.5 ± 1.0%, powder concentrator rotating speed is finely adjusted using DMC controls；When granularity content detection
When value is beyond control targe value 57.5 ± 1.0%, using Bang-Bang control adjustment cold wind valve openings, Hui Fenliang is set to return rapidly
To normal range (NR).
Go back to powder amount loop：
Mill in material it is many when, abrasive body is smaller with the impact of cylinder and cause grinding machine electric current relatively low, can be cold by increasing
Valve area reduces grinding pressure to reduce material Hui Fenliang；Conversely, reducing cold wind valve opening to increase material Hui Fenliang, increase
Plus grinding pressure, reach the effect of stabilization mill load.So, during other factors stabilization, can be controlled back by adjusting cold blast sliding valve
Powder amount come make grinding machine electric current stabilization.Table 2.1 is Bang-Bang control law tables, when from open circuit cement combine half final grinding system
When the Hui Fenliang of collection and the deviation of desired value are without departing from 105 ± 5t/h of threshold value, cold wind valve opening is carried out using DMC algorithms micro-
Adjust；When Hui Fenliang exceeds threshold value with the deviation of desired value, make Hui Fenliang rapid using Bang-Bang control adjustment cold wind valve openings
Approach desired value.
2.1 times powder amount loop Bang-Bang control law tables of table
(note：When "-" is expressed as arbitrary value in table)
As shown in figure 4, it is input quantity to choose cold wind valve opening, Hui Fenliang is output quantity, and model is carried out using least square
Identification, identification result is as shown in Figure 5.The unit-step response of model is obtained using Matlab emulation, then carries out rolling optimization, imitated
True correction, simulation result is as shown in Figure 6.
Control effect and analysis：Powder amount 110 ± 5t/h of control targe is set back, as shown in fig. 7, Hui Fenliang is in 250 seconds,
By the regulation of DMC controllers, in 109t/h, in 50 to 100 seconds, return powder amount increases Hui Fenliang stabilizations, and subsequent 100 arrive
In 150 seconds, return powder amount by cold wind valve regulation and decline, be less than 109t/h, in 150 to 250 seconds, Hui Fenliang slowly rises.It is situated between
In the reason for in-situ production environment and sensor error, although 109t/h and sets target 110t/h have certain deviation, but partially
Difference can receive, and controller has reached target.
<3um granularity contents loop：
Cement granularity is closely related with cement quality, influence<The principal element of 3um granularity contents is mill tail rotation speed of fan.
Therefore, controlled by DMC and Bang-Bang controls the method being combined to adjust mill tail rotation speed of fan to realize<3um granularity contents
Stabilization, when the deviation of desired value and desired value is without departing from threshold value 11.5 ± 0.5%, mill a tail wind machine is carried out using DMC algorithms
Fine setting；When deviation exceeds threshold value, it is set to approach desired value rapidly using Bang-Bang control adjustment mill tail rotation speed of fan.<3um
Granularity content Bang-Bang control laws table is as shown in following table 2.2.
Table 2.2<3um granularity contents loop Bang-Bang control law tables
(note：When "-" is expressed as arbitrary value in table)
As shown in figure 8, it is input quantity to choose mill tail rotation speed of fan,<3um granularities content is output quantity, using least square
Model Distinguish is carried out, identification result is as shown in Figure 9.The unit-step response of model is obtained using Matlab emulation, then is rolled
Dynamic optimization, simulated calibration, simulation result is as shown in Figure 10.
Control effect and analysis：Setting<3um granularity contents control targe 11.5%, as shown in figure 11, Hui Fenliang is 320
In second, by the regulation of DMC controllers,<3um granularities stable content is missed 11.3% between in-situ production environment and sensor
Difference the reason for, although 11.3% and sets target 11.5% have certain deviation, deviation can receive.Designed controller
Target is reached.
3-32um granularity contents loop：
The principal element for influenceing 3-32um granularity contents is powder concentrator rotating speed.Therefore, by adjust mill tail rotation speed of fan come
Realize the stabilization of 3-32um granularity contents.3-32um granularity content control law tables are as shown in following table 2.3.
Table 2.33-32um granularity contents loop Multimode Control rule table
(note：When "-" is expressed as arbitrary value in table)
As shown in figure 12, it is mode input to choose powder concentrator rotating speed, and 3-32um granularities content is output, using least square
Model Distinguish is carried out, identification result as shown in figure 13, obtains the unit-step response of model, then rolled using Matlab emulation
Dynamic optimization, simulated calibration, simulation result is as shown in figure 14.
Control effect and analysis：Setting 3-32um granularity contents control targe 56%, as shown in figure 15, Hui Fenliang is 700
In second, by the regulation of DMC controllers,<3um granularities stable content is missed 55.5% between in-situ production environment and sensor
Difference the reason for, although 56% and sets target 55.5% have certain deviation, deviation can receive.Designed controller reaches
Target is arrived.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
The limitation enclosed, on the basis of technical scheme, those skilled in the art do by need not paying creative work
The various modifications or deformation for going out are still within protection scope of the present invention.
Claims (7)
1. a kind of open circuit cement based on C# combines half whole grinding autocontrol method, it is characterized in that, specifically include：
1), using C#, communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；
2) the grain size parameter Real-time Feedback that, online Particle Size Analyzer will be detected gives engineering station, for its operating mode to grinding system
Judged；
3), engineering station carries out real-time control to grinding system.
2. a kind of open circuit cement based on C# according to claim 1 combines half whole grinding autocontrol method, its feature
Be, engineering station grinding system is carried out real-time control include back powder amount control,<The control of 3um granularities content, 3-32um granularity contents
Control；
The control process of the Hui Fenliang includes：
11), it is input into mill amount desired value；
12), as | e |>During ε, cold wind valve opening is controlled using Bang-Bang；As | e |<During ε, opened using DMC control cold blast sliding valves
Degree, makes the Hui Fenliang of system be in normal range (NR)；
13), enter to grind the Hui Fenliang of weigher real-time acquisition system, feed back to input, realize feedback control；
It is described<The control process of 3um granularity contents includes：
21), it is input into<3um granularity content desired values；
22), as | e |>During ε, using Bang-Bang control mill tail rotation speed of fan；As | e |<During ε, using DMC control mill a tail wind machines
Rotating speed；
23), online Particle Size Analyzer online acquisition<3um granularity contents, feed back to input, realize feedback control；
The control process of the 3-32um granularities content includes：
31) 3-32um granularity content desired values, are input into；
32), as | e |>During ε, powder concentrator rotating speed is controlled using Bang-Bang；As | e |<During ε, turned using DMC control powder concentrators
Speed；
33), online Particle Size Analyzer online acquisition 3-32um granularity contents, feed back to input, realize feedback control.
3. a kind of open circuit cement based on C# according to claim 2 combines half whole grinding autocontrol method, its feature
It is to realize that DMC controls are specifically included：
1), forecast model；
2), rolling optimization；
3), feedback compensation.
4. a kind of open circuit cement based on C# according to claim 3 combines half whole grinding autocontrol method, its feature
It is,
1) detailed process is：Model Distinguish is carried out to controlled device using least square, is gone out from the step response of controlled device
Hair, uses coefficient of dynamics a1,a2,…,apCarry out descriptive model, by the ratio and sumproperties of linear system, at the k moment, it is assumed that input
Constant, the predicted state initial to following N number of moment isIf being carved with M increment Delta u (k) during k ...
Δ u (k+M-1) acts on controlled device, then the output valve at system following each moment is：
In formula,It is the output valve at following certain moment, p is the time domain length of model, apIt is close enough steady-state value
Coefficient, ai-j+1It is the i-th-j+1 coefficient of dynamics, Δ u (k+j-1) is kth+j-1 increment,Table
Show controlled output increments of the i from j-1 to M；
2) detailed process is：The following P output predicted value at moment of predictionClose to desired value w (k+i), i=
, there is no too big fluctuation to make increment Delta u (k) in 1 ... P, set the optimal cost characteristic index function at k moment as：
In formula, qi、rjIt is weight coefficient, the journey suppressed to the tracking error of control system and to system control amount is represented respectively
Degree；Represent suppression of the performance index function J to output increment；Table
Show suppression of the performance index function J to control input；
It is assumed that input and output amount is matrix form, then system outputWith increment Delta uMRelation can be expressed as：
Wherein,
A is dynamic matrix, is the coefficient a responded by system stepiThe matrix of composition；For system is exported,It is system
Input, Δ uMK () is increment；
3) detailed process is：To reduce interference of the production process scene various factors to controlling, feedback compensation is carried out to system,
The output error of model open loop is reduced, introducing output error is：
Can use to qiThe mode of weighting is modified：
Wherein,It is the output premeasuring of k+1 time corrections；E (k+1) represents that the prediction at k+1 moment is defeated
Go out the output difference with the actual k+1 moment；Represent the prediction output at k moment；H represents that coefficient, value [0,1] are gathered in examination.
5. a kind of open circuit cement based on C# according to claim 2 combines half whole grinding autocontrol method, its feature
Be, Bang-Bang control especially by：
E (k)=Vr-Ve；(formula 9)
In formula, VrIt is actual measured value, VeIt is desired value, uBBFor the increment of Bang-Bang controllers is exported；ε is deviation threshold；
ubbIt is adjusting step, e (k) represents system output errors.
6. a kind of open circuit cement based on C# combines half whole grinding automatic control system, using claim 1-5 any one institute
A kind of whole grinding autocontrol method of open circuit cement joint half based on C# stated, it is characterized in that, including DCS system, online grain
Degree analyzer and engineering station；Communicated by OPC and completed to DCS system, the data interaction of online Particle Size Analyzer；Online granularity point
The grain size parameter Real-time Feedback that analyzer will be detected gives engineering station, judges for its operating mode to grinding system；Engineering station pair
Grinding system carries out real-time control.
7. a kind of open circuit cement based on C# combines half whole grinding automatic control system, it is characterized in that, grinding system includes back powder
Amount loop control system,<3um granularity contents loop control system, 3-32um granularity content loop control systems；
The described powder amount loop control system that returns includes：When Hui Fenliang and the phase of combining the collection of half final grinding system from open circuit cement
When the deviation of prestige value is without departing from 110 ± 5t/h of threshold value, cold wind valve opening is finely adjusted using DMC controls；When from open circuit cement
It is cold using Bang-Bang control adjustment when the deviation of the Hui Fenliang and desired value that combine the collection of half final grinding system exceeds threshold value
Valve area, makes Hui Fenliang rapidly return back to normal range (NR)；
Described<3um granularity content loop control systems include：When online Particle Size Analyzer<3um granularity content detections value is not
During beyond control targe value 11.5 ± 0.5%, powder concentrator rotating speed is finely adjusted using DMC controls；When granularity content detection value
During beyond control targe value 11.5 ± 0.5%, using Bang-Bang control adjustment cold wind valve openings, rapidly return back to Hui Fenliang
Normal range (NR)；
Described 3-32um granularity content loop control systems include：When the 3-32um granularity content detections of online Particle Size Analyzer
When value is without departing from control targe value 57.5 ± 1.0%, powder concentrator rotating speed is finely adjusted using DMC controls；When the inspection of granularity content
When measured value exceeds control targe value 57.5 ± 1.0%, using Bang-Bang control adjustment cold wind valve openings, make Hui Fenliang rapid
Return to normal range (NR).
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Effective date of registration: 20200824 Address after: 277716 west side of Mengtai highway, CheWang Town, Lanling County, Linyi City, Shandong Province Patentee after: LINYI ZHONGLIAN CEMENT Co.,Ltd. Address before: The central nanxinzhuang Ji'nan Road, No. 336 of 250022 cities in Shandong Province Co-patentee before: SHANDONG HENGTUO SCIENTIFIC TECHNOLOGY DEVELOPMENT Co.,Ltd. Patentee before: University of Jinan |
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