摘要
针对存在时延和丢包的参数不确定网络化控制系统,采用动态输出反馈控制策略,研究执行器失效故障时系统的鲁棒保性能容错控制问题.将丢包当作一种特殊时延,通过构造一种包含三重积分项的Lyapunov-Krasovskii泛函,采用时延分段处理方法,推证出使闭环故障系统具有鲁棒保性能容错能力的时滞依赖充分条件,并以求解线性矩阵不等式的方式给出最优控制器的设计方法.最后以一个仿真算例验证文中所述方法的可行性和有效性.
Aimed at the networked control system with time-delay,data packet dropout,and uncertain parameters,the robust guaranteed fault-tolerant control problem of a system with actuator failures was investigated by using dynamic output feedback control strategy.The data packet dropout was regard in the paper as a special kind of delay.By means of constructing a type of Lyapunov-Krasovskii functional with triple-integral terms,a delay-dependent sufficient condition was derived by using piecewise processing method of time-delay;with this sufficient condition,a closed-loop fault system would be made as possessing robust guaranteed cost fault-tolerant ability.Meanwhile,the design method of optimal controller was given by solving several linear matrix inequalities.Finally,simulation example was used to illustrate the effectiveness and feasibility of the proposed approach.
出处
《兰州理工大学学报》
CAS
北大核心
2012年第5期66-75,共10页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(60964003)
甘肃省自然科学基金(096RJZA101)
兰州理工大学特色学术梯队基金项目(0905)的资助
关键词
网络化控制系统
时变时延
鲁棒保性能
容错控制
networked control system
time-varying delay
robust guaranteed cost
fault-tolerant control
