Feed-forward control system for cold-rolled steel strip shape

Abstract

The invention discloses a feed-forward control system for a cold-rolled steel strip shape, which comprises a rolling force variation calculation module, a control parameter correction module, a regulating quantity calculation module and a roll bending feed-forward control execution module. The rolling force variation calculation module is used for calculating current rolling force variation between adjacent control cycles; the control parameter correction module is used for performing self-learning correction for control parameters to obtain shape variation caused by the unit rolling force variation after self-learning correction; the regulating quantity calculation module is used for calculating the optimal roll bending regulating quantity of a working roll of a mill and the optimal roll bending regulating quantity of an intermediate roll of the mill; and the roll bending feed-forward control execution module is used with the regulating quantity calculation module for regulating a working roll bending device and an intermediate roll bending device according to the optimal roll bending regulating quantity of the working roll of the mill and the optimal roll bending regulating quantity of the intermediate roll of the mill. The feed-forward control system for the cold-rolled steel strip shape can be used for effectively controlling the problem of shape quality deterioration caused by frequent fluctuation of rolling force during rolling of cold-rolled steel strips by the aid of the optimal roll bending regulating quantities of the working roll and the intermediate roll.

Description

technical field [0001] The invention relates to the technical field of cold-rolled strip steel, in particular to a cold-rolled strip shape feed-forward control system. Background technique [0002] With the rapid development of domestic and foreign equipment manufacturing industries, downstream users have increasingly high requirements for the shape quality of cold-rolled strip products, especially for industries such as high-end automobiles and high-end IT product manufacturing. Therefore, the shape quality of cold-rolled strip steel has become one of the main technical indicators for evaluating strip steel products. From the perspective of control technology, cold-rolled strip shape control technology is a highly complex technology that integrates several disciplines such as process, equipment, hydraulic pressure, control and computer, and the mutual coupling of control system parameters. Major iron and steel complexes and research institutions at home and abroad have inv...

AI Technical Summary

Problems solved by technology

The above-mentioned flatness feedforward control system can overcome the adverse effect of rolling force on flatness to a certain extent, and improve the quality of flatness control; but if the flatness control precision is to be further improved, it also has the following two defects: 1) cold Strip rolling is a complex system affected by many factors, so it is difficult to obtain the distribution of rolling force along the width direction of the strip with high precision and the gap between roll bending and loaded rolls only by theoretical calculation methods. Regulation coefficient of rolling force distribution

However, the existing flatness feed-forward control system is relatively isolated to study the problem of feed-forward control of rolling force, and the control parameters used by it and the control parameters used by the closed-loop feedback control system cannot be well unified, and cannot be integrated in the closed-loop feedback control system. The high-precision control parameters obtained in the feedback control system (such as the adjustment coefficient of the high-precision rolling mill flatness control device to the strip shape) are applied to the flatness feedforward control system

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