Dynamic model building of thickness control system for four-high rolling mill and H-infinity robust controller design

被引：1

作者：

Sun, Jianliang ^{[1
]}

Peng, Yan ^{[1
]}

Liu, Hongmin ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Engn Res Ctr Rolling Equipment & Complete Technol, Minist Educ, Qinhuangdao 066004, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND CONTROL | 2009年 / 7卷 / 01期

基金：

美国国家科学基金会;

关键词：

dynamic model building; genetic algorithm; H-infinity mixed sensitivity;

D O I：

10.1504/IJMIC.2009.027031

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, the integral dynamic model of four-high mill is built which includes the rolling process model, the dynamic model of mill stand-rolls and the dynamic model of hydraulic servo system. The three models are coupled and linearised, the MIMO transfer function of fourhigh mill system is obtained. Considering the quality of the product, the MIMO model is simplified and the thickness control system based on thickness gauge is derived. 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. 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 are improved significantly.

引用

页码：103 / 112

页数：10