The Integral Dynamic Model Building of 4-High Rolling Mill System and the Robust H∞ Controller Design of the Thickness Control System

摘要：

In this paper,the integral dynamic model of 4-h mill is built which includes the rolling process model,the mill stand-rolls dynamic model and the dynamic model of hydraulic servo system.The three models are coupled and linearized,then the MIMO transfer function of 4-h mill system is obtained.Considering the quality of the product,the MIMO model is simplified and the thickness control system is derived based on thickness gauge.The H∞ robust controller is designed for the thickness control system based on the mixed sensitivity robust control theory.The weighting functions are selected based on genetic algorithm (GA).Simulation results and comparison with the effect of PI controller show that the robust controller designed has better disturbance attenuation performance for parameter uncertainty and external disturbance.The dynamics performances and stability of the thickness control system based on thickness gauge were improved significantly.

关键词： Rolling process Dynamic model building Genetic algorithm H∞ mixed sensitivity

作者: Sun Jianliang Peng Yan Liu Hongmin Li Hailiang

作者单位: Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education,St Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education,St

会议类型: 国际会议

会议名称: International Conference on Modelling,Identification and Control(模拟、鉴定、控制国际会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）