具有时延和丢包的NCS H∞保性能容错控制

摘要

针对存在时延和丢包的网络化控制系统,研究执行器或传感器失效时,系统受外部有限能量扰动影响的H∞保性能容错控制问题.将丢包当做一种特殊时延,考虑综合时延的区间快变特性,采用状态反馈控制策略,通过构造适当的Lyapunov-Krasovskii泛函,推证出了闭环系统对执行器或传感器失效故障具有H∞保性能容错能力的时滞依赖充分条件,并以求解LMIs的方式给出了最优控制器的设计方法.最后以一个仿真算例验证了所述方法的可行性和有效性.%For a class of networked control system with delay and data packet dropouts,discussed the problem of H∞ guaranteed cost fault-tolerant control for networked control system against actuator and sensor failures by the influence of external disturbance with limited energy. Regard the data packet dropout as a special kind of delay. The synthetical delay possess fast interval time-varying characteristic. Based on state feedback control strategy and Lyapunov-Krasovakii functional, proved the delay-dependent sufficient conditions of H∞ guaranteed tolerant control for closed-loop systems against actuator and sensor failures, meanwhile, given the optimization design method of controller via solving several linear matrix inequalities. Finally,used an example to illustrate the effectiveness and the feasibility of proposed approach.