Closed loop speed compensation method for thickness control system of aluminum cold rolling mill

Abstract

The invention relates to a closed loop speed compensation method for a thickness control system of an aluminum cold rolling mill. The method comprises the following steps: data is obtained according to a speed measuring unit for calculating the value of acceleration, then control logic judgment is carried out, the thickness deviation is taken as an input signal of a closed loop PID compensation controller, the compensation amount is calculated and then output to a position AGC controller, and the computing process of closed loop speed compensation for one time is further finished. The stability of the system can be obviously improved by converting the open-loop compensation into a closed-loop compensation control algorithm, and the method can be better automatically adapted for the change conditions of the rolling process; and furthermore, by adjusting the parameter of the closed loop PID compensation controller, the field debugging time of the speed compensation controller can be reduced, the production cost can be reduced, and the performance of dynamic process of the thickness control system can be enhanced, therefore, the method is worthy of wide application in the industry.

Description

technical field [0001] The invention relates to a closed-loop speed compensation method for a thickness control system of an aluminum cold rolling mill, which is used for improving the performance of the dynamic process of the thickness control system of an aluminum cold rolling mill, and belongs to the technical field of cold rolling mill control. Background technique [0002] In the aluminum processing industry, the aluminum cold rolling mill, as the core processing equipment, plays an important role in the entire rolling process. The thickness automatic control system of the aluminum cold rolling mill plays a vital role in ensuring the thickness performance index of the rolled product, keeping the precision of the exit strip thickness within the allowable error range, and improving the rolling speed and efficiency. [0003] The thickness automatic control system of aluminum cold rolling mill is generally composed of controller, thickness gauge, position sensor, pressure s...

AI Technical Summary

Problems solved by technology

Using an open-loop speed compensation controller can reduce the influence of speed changes on the thickness difference. However, due to various working conditions in the rolling process, open-loop control is likely to cause divergence in response, resulting in system instability, and the open-loop gain adjustment is more dependent on Due to the prior knowledge of the process, it takes a lot of time to debug on site, and it is difficult for debuggers to find a suitable gain factor

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