Sectional type guaranteed cost shape control method for cold-rolled steel strips

Abstract

The invention relates to a sectional type guaranteed cost shape control method for cold-rolled steel strips, comprising the following steps of: considering the saturation characteristics of actuators of a six-roller cold-rolling mill by a sectional type multivariable optimization control indicator function, wherein the actuators comprise a roll inclining device, a working roll bending device, an intermediate roll bending device and other shape regulation and control devices, and the saturation characteristics of the actuators are respectively the maximum plus-minus strokes and the limit physical positions of the roll inclining device and the roll bending devices; calculating the control regulating quantity when the indicator function achieves the minimum value by solving the local deviation of the indicator function based on the sectional condition; based on the saturation physical characteristics of all the actuators of the six-roller cold-rolling mill, checking and correcting the control regulating quantity acquired by calculating for the first time; and performing optimization calculation on the regulating quantity of the actuator which does not achieve the saturation state, thus exerting the maximum regulation and control ability of the rolling mill to eliminate the shape deviation, and acquiring a cold-rolled steel strip product of high quality. The sectional type guaranteed cost shape control method also optimizes the cost for rolling process control.

Description

technical field [0001] The invention relates to the field of cold-rolled steel strips, in particular to a segmented cost-guaranteed strip shape control method for cold-rolled steel strips considering the saturation constraint characteristics of actuators. Background technique [0002] In recent years, with the continuous expansion of the scope of use of cold-rolled strip products, users have higher and higher requirements for the quality of the strip shape, so the cold-rolled strip shape control technology has become a modern steel enterprise and large research institutions. Special attention to key research topics. The principle of flatness control is to calculate the adjustment amount of each flatness control actuator by designing the flatness control algorithm, so that each flatness control means cooperate with each other, so as to eliminate the deviation between the flatness target value and the actual measured value to the greatest extent . [0003] The shape control ...

AI Technical Summary

Problems solved by technology

Unfortunately, this control idea is not reflected in the traditional shape control algorithm

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