轧机液压AGC-LP耦合系统的H_∞控制器设计  

Design of H_∞ controller for hydraulic AGC-looper coupling system for hot strip mills

作　　者：鲁凌云[1] 李维刚[1,2] 黄卫华[1] 严保康[1] Lu Lingyun Li Weigang Huang Weihua Yan Baokang(College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan University of Science and Technology,Wuhan 430065, China)

机构地区：[1]武汉科技大学信息科学与工程学院,湖北武汉430081 [2]武汉科技大学冶金工业过程系统科学湖北省重点实验室,湖北武汉430065

出　　处：《武汉科技大学学报》2017年第4期279-284,共6页Journal of Wuhan University of Science and Technology

基　　金：湖北省教育厅科学技术研究计划重点项目(D20161103);武汉市青年科技晨光计划资助项目(2016070204010099);武汉科技大学冶金工业过程系统科学湖北省重点实验室开放基金资助项目(Z201501)

摘　　要：根据热连轧机自动厚度控制(AGC)系统和液压活套控制(LP)系统各自的特点,结合这两个子系统的模型,建立液压AGC-LP耦合系统模型。参照广义系统的标准选取了合适的控制目标,基于H_∞控制理论对组合系统进行分析,采用MATLAB鲁棒控制工具箱中线性矩阵不等式(LMI)求解方法设计了H_∞状态反馈控制器,使得系统达到性能指标最优。将使用H_∞控制器与传统PID控制器的AGC-LP耦合系统进行仿真比较,结果表明,使用H_∞控制器的系统有更好的动态和稳态性能,两个子系统相关变量的耦合也有所改善。According to the characteristics of the automatic gauge control（AGC）system and the looper control system of hot strip mills,a model of the hydraulic AGC-LP system was constructed by the models of two subsystems.The appropriate control target was selected by the criterion of the generalized system to establish the generalized controlled object,and then the H∞state feedback controller was designed to achieve the optimal performance,with the linear matrix inequality（LMI）of robust control toolbox in Matlab.Comparing the PID control system with H∞ controll system in simulation,the results show that the system with the designed H∞ controller has a better dynamic and static performance,in which the relevant decoupling performance among variables of two subsystem has been improved.

关 键 词：热连轧机 AGC 活套系统 H∞控制器 LMI 解耦 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]