Transactions of Materials and Heat Treatment

Title：Smith PSO-BP-PID feedback control on fine cold section for laminar cooling of hot rolled strip steel

Authors： Ren Changhui Tian Hai Tao Zhen Zhang Jian Lei Sijie

Unit： School of Information Engineering Inner Mongolia University of Science and Technology

KeyWords： Smith estimated compensation PID BP-PID PSO-BP-PID Smith PSO-BP-PID

ClassificationCode：TG335.5

year,vol(issue):pagenumber：2023,48(12):177-181

Abstract：

In order to achieve the accurate control of strip steel coiling temperature, a compound control strategy was adopted, which was based on the feedforward control of neural network and supplemented by the feedback control. The fine cooling section of laminar flow cooling was a nonlinear system with large lag, and Smith estimator was proposed to compensate for the problem of large lag. Aiming at the nonlinear problem, the PID controller optimized by various means was used to enhance the real-time and dynamic performance of its control. Furthermore, BP neural network was proposed to optimize the parameters of PID controller, and the particle swarm optimization algorithm was used to optimize the initial weights and thresholds of BP newral network,and the improved particle swarm algorithm was adopted to improve its iterative convergence speed. Finally, the simulation verifies that Smith PSO-BP-PID has the smallest overshoot, the shortest adjustment time and the best dynamic performance.

Funds：

内蒙古自治区自然科学基金资助项目（2022MS06005）

作者简介：任长辉（1998-），男，硕士研究生 E-mail：2539018956@qq.com 通信作者：田海（1968-），男，硕士，副教授 E-mail：tian680125@163.com

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