A cold-rolled strip shape closed-loop control method and system

Abstract

The invention discloses a cold-rolled sheet shape closed-loop control method and system. The cold-rolled sheet shape closed-loop control method comprises the steps: evaluation functions synergistically controlled by cold-rolled sheet shape executing mechanisms are built according to cold-rolled sheet shape regulating and controlling efficacy coefficients; k-time solution vectors of the executing mechanisms are determined according to the evaluation functions; whether the k-time solution vectors are within feasible regions of the cold-rolled sheet shape executing mechanisms or not is judged, and if yes, the k-time optimal regulating variables are obtained; if not, evaluation functions harmoniously controlled by the cold-rolled sheet shape are determined, and gradient informationof the evaluation functions and the regulating directions of the cold-rolled sheet shape executing mechanisms are determined according to parameters of the cold-rolled sheet shape executing mechanisms; final values of the regulating variables of the executing mechanisms are determined according to the gradient information and the regulating directions; the evaluation functions are subjected to order reduction according to the final values, evaluation functions subjected to order reduction are obtained, and (k+1)-time solution vectors are determined, wherein the relation of k=k+1 is made to be met; and the cold-rolled sheet shape is adjusted according to the k-time optimal regulating variables of all the cold-rolled sheet shape executing mechanisms. According to the cold-rolled sheet shape closed-loop control method and system, the sheet shape regulating speed can be increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy automation, in particular to a cold-rolled strip shape closed-loop control method and system. Background technique [0002] As industrial users such as automobiles and home appliances continue to increase their demand for high-value-added, high-shape quality plates, how to improve the shape control accuracy has become a research hotspot in major steel mills and colleges at this stage. [0003] Modern tandem cold rolling mills generally have mechanical (backup roll tilting, work roll bending, intermediate roll bending, intermediate traverse) and non-mechanical (section cooling) and other means of shape control. In practical application, the closed-loop feedback control of the flatness of the cold tandem mill needs to comprehensively use various mechanical flatness adjustment methods according to the real-time flatness deviation of the strip, and to eliminate the flatness deviation to the greates...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cold-rolled strip shape closed-loop control method and system to solve the problems of slow strip shape adjustment speed and low calculation accuracy in the prior art

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