Robust fault-tolerant control for uncertain networked control systems with state-delay and random data packet dropout

A robust fault-tolerant controller design problem for networked control system (ncs) with random packet dropout in both sensor-to-controller link and controller-to-actuator link is investigated. a novel stochastic ncs model with state-delay,model uncertainty,disturbance,probabilistic sensor failure,and actuator failure is proposed. the random packet dropout,sensor failures,and actuator failures are characterized by a binary random variable. the sufficient condition for asymptotical mean-square stability of ncs is derived and the closed-loop ncs satisfies h ∞ performance constraints caused by the random packet dropout and disturbance. the fault-tolerant controller is designed by solving a linear matrix inequality. a numerical example is presented to illustrate the effectiveness of the proposed method. © copyright 2012 xiaomei qi et al.