Cold-rolled steel strip shape control method for actively preventing saturation phenomenon of executer

Abstract

The invention discloses a cold-rolled steel strip shape control method for actively preventing saturation phenomenon of an executer. The method comprises the following specific steps of: acquiring real-time position state data of a rolling mill transmission device on line, computing the strip shape regulating and controlling capabilities of a rolling mill in a current control period in combination with the strip shape regulating and controlling power coefficients of each transmission device, and laying a basis for effective filtering of uncontrollable components in strip shape deviations; andquickly filtering a strip shape deviation signal according to the strip shape regulating and controlling capabilities in the current control period, effectively separating controllable parts from uncontrollable parts in the strip shape deviation signal, designing a multi-variable optimization controller by using the controllable parts, computing the control regulating amount of the rolling mill transmission device, actively avoiding the saturation phenomenon of the executer, reducing wear of mechanical components of a control device, and realizing high-accuracy strip shape control over a cold-rolled steel strip. According to the method, the service life of a strip shape control device is prolonged, the problem of poor strip shape control effect is solved, and a portable means is provided for enhancing the cold-rolled strip shape control quality.

Description

technical field [0001] The invention relates to the field of cold-rolled steel strips, in particular to a cold-rolled steel strip shape control method for actively avoiding actuator saturation. Background technique [0002] Cold-rolled strip steel is a high value-added steel enterprise product, and users' requirements on the shape and quality of cold-rolled strip steel are getting higher and higher with the continuous expansion of its application range. With the rapid development of computer technology and control technology, the on-line control technology of plate shape has been successfully applied in actual production and achieved good control effect. [0003] The traditional flatness control system and method take the elimination of flatness deviation as the optimization goal, and calculate the adjustment amount of each transmission device of the rolling mill on-line to change the exit flatness. From the perspective of control theory alone, the calculated adjustment amo...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a cold-rolled strip shape control method that actively avoids the occurrence of actuator saturation, so as to solve the problem of frequent occurrence of actuator saturation in the traditional cold-rolled strip shape control. The technical problem of poor shape control effect

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