Method for controlling strip shape of cold-rolled strip steel

Abstract

The invention provides a method for controlling the strip shape of cold-rolled strip steel. The method for controlling the strip shape of the cold-rolled strip steel comprises the steps of receiving target strip shape distribution signals and actual strip shape distribution signals, and calculating discrete type strip shape deviation values; receiving real-time position signals of a roll pouring device, a working roller bending device and a middle roller bending device of a rolling mill, and calculating the maximum movement stroke and the minimum movement stroke can be achieved by each transmission device of the rolling mill in a current control cycle; forming state vectors of a particle swarm optimization algorithm through the control output quantity of the roller pouring device, the control output quantity of the working roller bending device and the control output quantity of the middle roller bending device of the rolling mill, and generating N1 sets of state vector initial population particles of the particle swarm optimization algorithm and an index evaluation function in a particle swarm optimization learning process; calculating the optimal control output quantity of the roller pouring device, the optimal control output quantity of the working roller bending device and the optimal control output quantity of the middle roller bending device, and transmitting the optimal control output quantities to a basic automation grade PLC of a strip shape control system to complete on-line adjustment. The method for controlling the strip shape of the cold-rolled strip steel fundamentally eradicates the possibility of the occurrence of the phenomenon of saturation of an actuator in the control process of the strip shape of the cold-rolled strip.

Description

technical field [0001] The invention belongs to the field of cold-rolled steel strips, in particular to a method for controlling the shape of cold-rolled steel strips. Background technique [0002] Cold-rolled strip steel belongs to a high value-added product of iron and steel enterprises. In recent years, downstream users have higher and higher requirements for the quality of cold-rolled strip steel products, especially the shape quality. More and more cold-rolled strip companies have begun to pay attention to the research and development of flatness control technology in the rolling process. With the rapid development of computer technology and control technology, the on-line control technology of plate shape has been successfully applied in actual production and achieved good control effect. [0003] Flatness is a main technical index to measure whether the cold-rolled strip product is qualified or not. Good strip flatness control can reduce the occurrence of flatness d...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a cold-rolled strip shape control method to solve the problem that the optimal control of the tilting roll device, work roll bending device and intermediate roll bending device cannot be obtained in the traditional cold-rolled strip shape control process output, and the phenomenon of actuator saturation often occurs, which causes the technical problems of severe wear of the mechanical parts of the flatness control device of the rolling mill and the deterioration of the flatness control effect

Images