A control method for a compound vibration control system of a continuous casting machine crystallizer

Abstract

The invention discloses a combined vibration control system and a combined vibration control method for a crystallizer of a continuous casting machine, and belongs to the field of metallurgical control. The system comprises an external loop controller and an internal loop controller, wherein the internal loop controller comprises a controller, a servo valve amplifier, a servo valve, a hydraulic device and a displacement sensor, which are sequentially connected into a closed loop; the external loop controller comprises an expected trajectory memory, an iterative learning controller and a control memory bank; the expected trajectory memory is connected with the iterative learning controller; the iterative learning controller is connected with the control memory bank and the controller. The control method comprises the following steps: performing iterative learning control on the external loop controller, and introducing a PID (Proportion Integration Differentiation) control process into the internal loop controller, thereby performing combined control on a crystallization vibration system of the continuous casting machine. According to the system and the method, a PID controller with higher reliability is added to a feedforward link of the system, so that the system is high in anti-interference performance, iterative learning convergence rate and efficiency and stable in robustness.

Description

technical field [0001] The invention belongs to the technical field of continuous casting in the metallurgical industry, and more specifically relates to a control method for a compound vibration control system of a mold of a continuous casting machine. Background technique [0002] The continuous casting production process has been widely used in the steel industry due to its low cost, high efficiency, flexible operation and good product quality. The crystallizer is the key equipment of the continuous casting machine, and the mold vibration is the core technology of the continuous casting process, which directly affects the forming of the billet and the quality of the billet. The crystallizer vibration device is a vibration mechanism connected to the mold. Its function is to prevent the billet shell from sticking to the mold copper plate, and at the same time obtain a good casting billet surface. Therefore, higher requirements are put forward for the mold vibration control ...

AI Technical Summary

Problems solved by technology

[0005] In view of the existing iterative learning control, due to the continuous change of the continuous casting production environment, that is, there are various uncertain disturbances and deviations in the actual dynamic process, resulting in particularly prominent problems of unstable robustness, the present invention provides a Control Method of Compound Vibration Control System for Continuous Casting Mold

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