执行器饱和不确定NCS非脆弱鲁棒容错控制

Non-fragile robust fault-tolerant control for uncertain NCS with actuator saturation

针对存在时变时延和丢包的不确定网络化控制系统(NCS),同时考虑执行器饱和、控制器参数摄动以及非线性扰动等约束,研究执行器发生结构性失效故障时系统的鲁棒容错多约束控制问题.基于时滞依赖Lyapunov方法和容错吸引域定义,采用状态反馈控制策略推证出了闭环故障不确定网络化控制系统稳定的少保守性不变集充分条件,并给出了非脆弱鲁棒容错控制器的设计方法以及最大容错吸引域的估计.仿真算例验证了所述方法的可行性和有效性.

For a class of uncertain networked control system（NCS） with time-varying delay and data packet dropout, the problem Of multi-constraints robust fault-tolerant control for NCS with actuator structural failures is discussed by using state feedback control strategy. The effect of actuator saturation, nonlinear perturbation and controller parameter perturbation are considered simultaneously. Based on a class of delay-dependent Lyapunov method and a definition of the domain of fault- tolerant attraction, the set of invariance conditions of the closed-loop uncertain NCS against actuator structural failures is derived, and the design method of non-fragile robust fault-tolerant controller is given. The domain of fault-tolerant attraction of the closed-loop system is estimated. A simulation example shows the effectiveness and the feasibility of the proposed annroach.