线性时变分段参数系统的稳定性与L_2增益性能  

Stability and L_2-Gain of Linear Parameter-Varying Subsection System

作　　者：王涛[1] 李冀昆[1] 刘黎[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《西南交通大学学报》2009年第5期688-692,共5页Journal of Southwest Jiaotong University

基　　金：西南交通大学科技发展基金的支持(项目编号:2007A05)

摘　　要：为降低李雅普诺函数(Lyapunov function)分析参数时变系统引起的保守性,研究了系统稳定性、L2增益与参数分段和参数变化率的关系,提出了一种同时考虑参数分段和参数变化率的线性时变参数系统的线性矩阵不等式(LMI)设计方法.仿真结果表明,系统具有鲁棒稳定性和对干扰的抑制作用,该方法适用于各种线性时变参数系统.In order to reduce conservative performances resulted in by the application of the Lyapunov function to the analysis of a linear parameter-varying system, the relationships of the stability and L2- gain of the system with the subsection and changing rate of parameters were investigated. By considering the subsection and changing rate of parameters together, a design method for linear parameter-varying systems was put forward based on LMI （linear matrix inequality）. Simulation results show that the system is robust and external disturbance is outstandingly restrained to prove this method applicable to all kinds of linear parameter-varying systems.

关 键 词：线性时变参数 参数分段与变化率 稳定性 L2增益 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]