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Cold rolling strip steel plate shape dynamic variable gain control method

A control method and technology for strip shape, applied in contour control and other directions, can solve the problems of difficult to obtain satisfactory control effect, unsatisfactory control effect, etc., to solve the problem of system dynamic quality, good dynamic characteristics and robustness, and eliminate stability. The effect of state error

Active Publication Date: 2015-06-03
ANSHAN IRON & STEEL GROUP CORPORATION
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Problems solved by technology

However, due to the limitation of the PID controller structure, even with the optimal PID parameters, the control effect is not ideal for lagging objects and complex objects.
Therefore, it is difficult to obtain a satisfactory control effect by using the conventional PID algorithm

Method used

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  • Cold rolling strip steel plate shape dynamic variable gain control method
  • Cold rolling strip steel plate shape dynamic variable gain control method
  • Cold rolling strip steel plate shape dynamic variable gain control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0061] Step 1 Calculation of speed gain coefficient:

[0062] The speed gain is calculated, and the lag time is determined according to the trigger cycle of the shape measurement roller.

[0063] τ = l 2 πR

[0064] Values ​​of control parameters: R is the radius of the shape measuring roll, which is 0.175m; l—the distance between the shape meter and the exit of the rolling mill, which is 4m.

[0065] The speed gain factor is:

[0066] kp _ v [ n ] = k _ fact [ n ] × t _ trig × t _ cycle t _ delay [ ...

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Abstract

The invention relates to a cold rolling strip steel plate shape dynamic variable gain control method. Plate shape dynamic variable gain coefficient and speed gain coefficient are related to plate shape deviation coefficient and elasticity modulus deviation coefficient. Rolling force fluctuation influence is considered in elasticity modulus deviation coefficient calculation. Field actual application calculation method and data of each coefficient is given in plate shape dynamic variable gain coefficient calculation. The method has the advantages that introduction of a dynamic variable gain controller, system dynamic quality problems caused by pure lag during plate shape control are solved effectively, robustness of a plate shape control system is improved while good dynamic features and robustness of the dynamic variable gain control is also considered, and steady-state errors are eliminated to allow the control system to form a floating system.

Description

technical field [0001] The invention relates to a cold-rolled strip shape control method, in particular to a cold-rolled strip shape dynamic variable gain control method. Background technique [0002] In the production process of cold-rolled strip steel, the shape is an important technical index of the product. The pros and cons of the shape control performance are directly related to the quality of the product. Because in the production process, the plate shape control has the characteristics of hysteresis, time-varying, nonlinear and so on. Despite the rapid development of control theory, PID controller is still the most common controller in industrial control process. It has the advantages of simplicity, good stability, high reliability, and easy operation and adjustment by field engineers. Therefore, it is widely used in the control systems of industries such as metallurgy, machinery, thermal engineering, chemical industry and light industry. However, due to the limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
Inventor 刘佳伟吴怀南王鹏飞谷文革景博雯郭立群李玲吴穷
Owner ANSHAN IRON & STEEL GROUP CORPORATION
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