多故障网络控制系统模态依赖下的H_∞控制

H_∞ control for networked control systems with multi-fault and mode-dependent

针对存在传感器失效、随机丢包和时延等多故障的网络控制系统,建立了系统的转换模态。通过运用Lyapunov和LMI判定方法,研究了系统在模态依赖下渐近稳定的充分条件。设计了传感器失效的模型,提出了控制器的设计方法,运用鲁棒H∞控制方法,改善了闭环网络控制系统的性能。通过仿真实例验证了该方法的可行性和有效性。

For a class networked control systems against sensor failure, random packet dropout and time-delay, conversion mode is established. Based on constructing a suitable Lyapunov function and Linear Matrix Inequality（LMI）techniques,the sufficient conditions for the stability of systems asymptotically in modal dependence are researched. The sensor failure model is designed and the design method of controller is put forward. Through using robust H$fault-tolerant control method,the performance of the closed-loop networked control systems is improved. The simulation results show the effectiveness and the feasibility of proposed approach.