Model-free self-adaptive rolling mill casting liquid level control method and device and storage medium

Abstract

The invention discloses a model-free adaptive algorithm based rolling mill casting liquid level control method. The method comprises the following steps that current liquid level data in a casting mechanism are acquired; a pseudo partial derivative of at previous moment, a displacement increment of a screw rod at the previous moment and an expected liquid level value at the next moment in the casting mechanism are determined; the current liquid level data, the pseudo partial derivative at the previous moment, the displacement increment of the screw rod at the previous moment and the expected liquid level value at the next moment are calculated according to a formula (1) to obtain a pseudo partial derivative at the current moment; and the pseudo partial derivative at the current moment, thecurrent liquid level data and the expected liquid level value at the next moment are calculated according to a formula (2) to obtain a target displacement increment of the screw rod at the current moment, and a moving motor is controlled to drive the screw rod to rotate by the target displacement increment. The invention further provides a model-free adaptive algorithm based rolling mill castingliquid level control device and a storage medium. According to the method, device and storage medium, the liquid level control precision can be improved.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a method for controlling casting liquid level of a rolling mill based on a model-free adaptive algorithm, a device for controlling the casting liquid level of a rolling mill based on a model-free adaptive algorithm, and a computer-readable storage medium. Background technique [0002] The existing control method of casting liquid level in rolling mill is processed by PID control technology, and the control effect of PID control technology is not ideal when dealing with the system control problems with strong nonlinearity, time variation and periodic disturbance. The rolling mill casting process is a time-varying process. Affected by factors such as air cooling and impurities, a crystalline film will form on the surface of the liquid metal during the flow and casting process of the metal liquid, making the flow rate of the liquid lower and lower. Therefore, the accuracy ...

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Problems solved by technology

[0003] In view of the above, it is necessary to propose a method for controlling casting liquid level of rolling mill based on model-free adaptive algorithm, a device for controlling casting liquid level of rolling mill and storage medium based on model-free adaptive algorithm, which can solve the problem of existing control technology on the casting process of rolling mill. The problem of low precision of medium level control

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