阅读说明：本技术 一种抑制光整延伸率振荡的控制方法 (A kind of control method inhibiting the oscillation of finishing elongation percentage ) 是由 刘向国 王天国 于 2019-09-06 设计创作，主要内容包括：一种抑制光整延伸率振荡的控制方法,包括如下方法：增加硬件通讯,缩短延伸率反馈的采样时间；引入前馈控制方式,前馈控制的附加轧制力直接叠加到预设定轧制力,用于消除轧机动态时的延伸率偏差；在延伸率闭环控制器上,根据现场工况的变化,增加变增益控制,使控制器的输出能够有效抑制工况变化对延伸率产生的波动；增加升减速预控模型,使得机组在升减速时,延伸率控制能够平稳；优化延伸率控制器的输出限幅,优化延伸率反馈的滤波时间,优化延伸率控制器的PI参数。本发明针对冶金行业连续生产线的光整机延伸率出现振荡时,如何抑制和消除振荡问题,保证延伸率闭环控制稳定,从而保证产品的表面质量和性能。(A kind of control method inhibiting the oscillation of finishing elongation percentage, including following method: increasing hardware communication, shortens the sampling time of elongation percentage feedback；Feed-forward control manner is introduced, the additional roll-force of feedforward control is directly superimposed to presetting roll-force, for eliminating elongation percentage deviation when milling train dynamic；On elongation percentage closed loop controller, according to the variation of field working conditions, increases Gain-scheduling control, make the output of controller that operating condition can effectively be inhibited to change the fluctuation generated to elongation percentage；Increase rise a deceleration precaution mood so that unit liter slow down when, elongation control can be steady；Optimize the output violent change of elongation control device, the filtering time of optimization elongation percentage feedback optimizes the PI parameter of elongation control device.When the present invention is vibrated for the polishing machine elongation percentage of metallurgy industry tinuous production, how to inhibit and oscillation-damped problem, guarantee elongation percentage closed-loop control stabilization, to guarantee the surface quality and performance of product.)

1. a kind of control method for inhibiting the oscillation of finishing elongation percentage, which is characterized in that including following method:

1) increase hardware communication, shorten the sampling time of elongation percentage feedback, it is straight between main line MRG and finishing hydraulic regulation CPU One PROFIBUS-DP communication of increase is connect, the sampling time of elongation percentage feedback is shortened, enables constantly to reflect elongation percentage Real change；

2) feed-forward control manner is introduced, the additional roll-force of feedforward control is directly superimposed to presetting roll-force, rolls for eliminating Elongation percentage deviation when motor-driven state, additional roll-force dFW2 is related to the root of polishing machine speed, specific formula for calculation are as follows: DFW2=[SQR (VL)-SQR (Vmin)]/[SQR (Vmax)-SQR (Vmin)]；

In formula: VL is: the linear velocity in finishing rack, unit: m/s；

Vmin is: the minimum linear velocity in finishing rack, unit: m/s；

Vmax is: the maximum line velocity in finishing rack, unit: m/s；

3) on elongation percentage closed loop controller, according to the variation of field working conditions, increase Gain-scheduling control, enable the output of controller Enough that operating condition is effectively inhibited to change the fluctuation generated to elongation percentage, elongation percentage is divided into A4, A5, A6 three stage control, and 0.1 < A4 < A5 < A6 < 2.0, corresponding setting adjuster proportional gain parameter Kp are B4, B5, B6,0.3 < B4 < B5 < B6 < 1.0, when elongation percentage is less than A4 When, Kp=B4；When elongation percentage is less than A5, is greater than A4, Kp=B5；When elongation percentage is greater than A6, Kp=B6；

4) increase rise a deceleration precaution mood so that unit liter slow down when, elongation control can be steady, using following algorithm come Calculate pre-control roll-force:

RF=K × (RF_set-RF_min)；

In formula: RF is: polishing machine rises deceleration pre-control roll-force and gives, unit: ton；

K=dFW2；

RF_set is: polishing machine rolling force setup value, unit: ton；

RF_min is: polishing machine minimum roll-force, unit: ton；

5) according to live actual condition, the output violent change for optimizing elongation control device is -200~200 tons of roll-forces, is added To goal-setting roll-force, the filtering time for optimizing elongation percentage feedback is 45~80ms, optimizes the PI parameter of elongation control device Are as follows: P is proportional gain 300~450；I is integral gain 0.01~0.06.

Technical field

The invention belongs to metallurgy industry Processing Lines automation control areas more particularly to a kind of inhibition finishing to prolong Stretch the control method of rate oscillation.

Background technique

Certain steel mill's cold rolling 4# galvanized wire polishing machine is elongation control mode, when producing thin material, can satisfy and wants substantially It asks, but in the thick material (1.5mm or more) of production, there have been elongation percentage oscillatory occurences, cause roll-force to follow oscillation, due to rolling It is small when big when power, it causes surface of steel plate for a moment white for a moment black, also strangles print defect with finishing sometimes, brought to product quality non- Often big influence.So we study the method for how inhibiting polishing machine elongation percentage to vibrate.

Summary of the invention

The object of the present invention is to provide a kind of control methods of inhibition finishing elongation percentage oscillation, connect mainly for metallurgy industry When the polishing machine elongation percentage of continuous production line vibrates, how to inhibit to ask with oscillation-damped using various effective technology methods Topic guarantees that elongation percentage closed-loop control is stablized, to guarantee the surface quality and performance of product.

In order to achieve the above object, the present invention is implemented with the following technical solutions:

A kind of control method inhibiting the oscillation of finishing elongation percentage, including following method:

1) increase hardware communication, shorten the sampling time of elongation percentage feedback, main line MRG and finishing hydraulic regulation CPU it Between directly increase PROFIBUS-DP communication, the sampling time of elongation percentage feedback is shortened, enables constantly to reflect and prolong Stretch the real change of rate；

2) feed-forward control manner is introduced, the additional roll-force of feedforward control is directly superimposed to presetting roll-force, for disappearing Elongation percentage deviation when except milling train dynamic, additional roll-force dFW2 is related to the root of polishing machine speed, specific formula for calculation Are as follows: dFW2=[SQR (VL)-SQR (Vmin)]/[SQR (Vmax)-SQR (Vmin)]；

In formula: VL is: the linear velocity in finishing rack, unit: m/s；

Vmin is: the minimum linear velocity in finishing rack, unit: m/s；

Vmax is: the maximum line velocity in finishing rack, unit: m/s；

3) on elongation percentage closed loop controller, according to the variation of field working conditions, increase Gain-scheduling control, make the defeated of controller Operating condition can be effectively inhibited to change the fluctuation generated to elongation percentage out, elongation percentage is divided into A4, A5, A6 three stage control, 0.1 < A4 < A5 < A6 < 2.0, corresponding setting adjuster proportional gain parameter Kp is B4, B5, B6,0.3 < B4 < B5 < B6 < 1.0, when elongation percentage is small When A4, Kp=B4；When elongation percentage is less than A5, is greater than A4, Kp=B5；When elongation percentage is greater than A6, Kp=B6；

4) increase rise a deceleration precaution mood so that unit liter slow down when, elongation control can be steady, using following calculation Method calculates pre-control roll-force:

RF=K × (RF_set-RF_min)；

In formula: RF is: polishing machine rises deceleration pre-control roll-force and gives, unit: ton；

K=dFW2；

RF_set is: polishing machine rolling force setup value, unit: ton；

RF_min is: polishing machine minimum roll-force, unit: ton；

5) according to live actual condition, the output violent change for optimizing elongation control device is -200~200 tons of roll-forces, by it It is attached to goal-setting roll-force, the filtering time of optimization elongation percentage feedback is 45~80ms, optimizes the PI of elongation control device Parameter are as follows: P is proportional gain 300~450；I is integral gain 0.01~0.06.

Compared with prior art, the beneficial effects of the present invention are:

A kind of control method for inhibiting the oscillation of finishing elongation percentage of the present invention, mainly for the light of metallurgy industry tinuous production When complete machine elongation percentage vibrates, how to be inhibited using various effective technology methods and oscillation-damped problem, guarantee elongation percentage Closed-loop control is stablized, to guarantee the surface quality and performance of product.

After the present invention is implemented, elongation control is fully met within 0.05% under AEC mode (elongation control mode) The production of live Automobile Plate needs.

Detailed description of the invention

Fig. 1 is elongation percentage Gain-scheduling control curve graph.

Specific embodiment

Specific embodiments of the present invention will be further explained below:

A kind of control method inhibiting the oscillation of finishing elongation percentage, including following method:

1) increase hardware communication, shorten the sampling time of elongation percentage feedback, main line MRG and finishing hydraulic regulation CPU it Between directly increase PROFIBUS-DP communication, the sampling time of elongation percentage feedback is shortened, enables constantly to reflect and prolong Stretch the real change of rate；

2) feed-forward control manner is introduced, the additional roll-force of feedforward control is directly superimposed to presetting roll-force, for disappearing Elongation percentage deviation when except milling train dynamic, additional roll-force dFW2 is related to the root of polishing machine speed, specific formula for calculation Are as follows: dFW2=[SQR (VL)-SQR (Vmin)]/[SQR (Vmax)-SQR (Vmin)]；

In formula: VL is: the linear velocity in finishing rack, unit: m/s；

Vmin is: the minimum linear velocity in finishing rack, unit: m/s；

Vmax is: the maximum line velocity in finishing rack, unit: m/s；

3) on elongation percentage closed loop controller, according to the variation of field working conditions, increase Gain-scheduling control, make the defeated of controller Operating condition can be effectively inhibited to change the fluctuation generated to elongation percentage out, elongation percentage is divided into A4, A5, A6 three stage control, 0.1 < A4 < A5 < A6 < 2.0, corresponding setting adjuster proportional gain parameter Kp is B4, B5, B6,0.3 < B4 < B5 < B6 < 1.0, when elongation percentage is small When A4, Kp=B4；When elongation percentage is less than A5, is greater than A4, Kp=B5；When elongation percentage is greater than A6, Kp=B6；As shown in Figure 1；

4) increase rise a deceleration precaution mood so that unit liter slow down when, elongation control can be steady, using following calculation Method calculates pre-control roll-force:

RF=K × (RF_set-RF_min)；

In formula: RF is: polishing machine rises deceleration pre-control roll-force and gives, unit: ton；

K=dFW2；

RF_set is: polishing machine rolling force setup value, unit: ton；

RF_min is: polishing machine minimum roll-force, unit: ton；

5) according to live actual condition, the output violent change for optimizing elongation control device is -200~200 tons of roll-forces, by it It is attached to goal-setting roll-force, the filtering time of optimization elongation percentage feedback is 45~80ms, optimizes the PI of elongation control device Parameter are as follows: P is proportional gain 300~450；I is integral gain 0.01~0.06.