Main-auxiliary double-closed-loop rectifying control system based on PID

Abstract

The invention relates to a main-auxiliary double-closed-loop rectifying control system based on PID, and belongs to the technical field of automatic detection and control of metallurgical mechanical equipment. The main-auxiliary double-closed-loop rectifying control system comprises a main control system and an auxiliary control system which are connected with each other. The main control system comprises an infrared sensor used for detecting the actual position of an aluminum sheet strip in real time, a data collecting unit for collecting and processing data in real time, a controller unit for conducting deviation calculating and an executing mechanism for receiving control signals. The auxiliary control system comprises a grating ruler used for detecting the position of an uncoiler reducer base and a counting collecting unit used for counting. According to the main-auxiliary double-closed-loop rectifying control system based on PID, double-closed-loop control is adopted, and comparedwith an existing single-closed-loop control system, the rectifying precision of the aluminum sheet strip at a rolling mill inlet and the stability and accuracy of the system can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of automatic detection and control of metallurgical machinery and equipment, and specifically relates to a PID-based main and auxiliary double closed-loop deviation correction control system, which is an online detection device and is suitable for on-line control of deviation correction of aluminum strips in the aluminum foil rolling process. Background technique [0002] The rolling of aluminum foil is precision rolling, and the quality and output are very sensitive to various factors. In the cold rolling production process of aluminum foil, due to the difference of the incoming aluminum coil, the different roughness of the roll surface, the non-parallel axis of the conveying roll, and the fluctuation of the tension of the aluminum strip, the lateral deviation of the aluminum strip is caused. The deviation of the aluminum strip will cause the aluminum coil to not be curled neatly, affect the rolling product...

AI Technical Summary

Problems solved by technology

At present, most deviation correction systems adopt PLC control. Compared with industrial computer control, the cost is higher. With the development of electronic technology, high-performance single-chip microcomputers can fully meet the needs of aluminum strip deviation correction systems, and the system control is flexible and low cost.

Secondly, most of the existing correction systems only control the actuator based on the detected position of the aluminum strip, which is prone to insufficient hydraulic cylinder pressure and slow response speed, which affects the stability and accuracy of the system and ultimately affects production efficiency.

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