Strip steel plate shape control method and device, medium and program product

By dividing the effective measurement area in the cold rolling mill shape control, optimizing the adjustment amount using weighting factors and penalty functions, and combining iterative calculations using the quasi-Newton method, the balance between calculation accuracy and online calculation amount in the existing technology is solved, and high-precision shape feedback control is achieved.

CN121715423APending Publication Date: 2026-03-24WISDRI ENG & RES INC LTD
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Patent Information

Application Number
CN202511705851.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-19
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing cold rolling mill shape feedback control systems struggle to balance computational accuracy and online computational load. Direct inversion algorithms are sensitive to model errors and unstable, while singular value decomposition algorithms for the efficiency coefficient matrix have excessive computational load.

Method used

By dividing the effective measurement area of ​​the strip width, determining the tension value vector and using weighting factors, and combining the penalty function method and quasi-Newton method for iterative calculation, the adjustment amount is optimized, reducing the amount of online calculation and improving the calculation accuracy.

Benefits of technology

Without significantly increasing the amount of online computation, it improves the calculation accuracy and stability of plate shape control, making it suitable for real-time application on PLC controllers and enhancing the quality of plate shape feedback control in cold rolling mills.

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Abstract

The invention provides a strip steel plate shape control method and device, a medium and a program product, and the method comprises the steps: determining an effective measurement region actually covered by the strip steel width according to the strip steel width and a plate shape roller measurement region; obtaining a tension value vector of the effective measurement area; determining a weight factor of each effective measurement area to obtain a weight factor vector; according to the weight factor vector, converting the tension value vector into a corresponding strip shape actual value curve, and according to the strip shape setting curve, determining a strip shape relative error vector; according to the plate shape relative error vector and a preset adjusting quantity over-limit value, a penalty function method is used for setting a target function of plate shape control multivariable optimization; and using a quasi-Newton method to iteratively calculate and obtain the optimal adjusting quantity of the next control period of the plate shape control, wherein the optimal adjusting quantity is the plate shape control adjusting quantity which enables the value of the target function to be smaller than a preset minimum value. By means of the technical scheme, the calculation precision of the optimization adjusting amount can be improved under the condition that the online calculation amount is not remarkably increased.
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