Closed-loop Speed ​​Compensation Method for Thickness Control System of Aluminum Cold Rolling Mill

Abstract

The invention provides a closed-loop speed compensation method for the thickness control system of an aluminum cold rolling mill. The acceleration value is calculated according to the data obtained by the speed measurement unit, and the control logic is judged. The thickness deviation is used as the input signal of the closed-loop PID compensation controller, and the calculated compensation amount is output to the The position AGC controller completes the calculation process of a closed-loop speed compensation. By converting the open-loop compensation to the closed-loop compensation control algorithm, the stability of the system can be significantly improved, and the rolling process can be better automatically adapted to the changing conditions. Moreover, by adjusting the parameters of the PID controller, the on-site debugging time of the speed compensation control can be reduced, the production cost can be reduced, and the performance of the dynamic process of the thickness control system can be improved, which 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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