Fault-tolerant design for MIMO networked control systems with communication constraints

In networked control systems, the system stability degrades because the sensor data are not transmitted successfully and the actuators do not obtain data. The sensors failing to transmit data and the actuators obtaining no information were treated to be invalidated temporarily, and then the stability of the multiple-input-multiple-output (MIMO) networked control systems in which sensors, controllers and actuators were all time-driven was investigated. This paper established a discrete linear system model with the sensor and actuator fault by using an augmented state vector method, proved the stability theorem through utilizing a Lyapunov function and derived the parameters of the controller by solving a set of linear matrix inequalities. The simulation results illustrated the effectiveness of the proposed method.