Fault Detection of Networked Control Systems with Packet Dropout Subject to Sensor Saturation

Fault detection of networked control systems with packet dropout subject to sensor saturation for linear time-invariant discrete-time systems with bounded disturbances is discussed in this paper. The packet dropout is assumed to be existing in the sensor-to-controller link, and two independent Bernoulli distributed white sequences are used to describe the packet dropouts. A fault detection observer is designed to increase the fault sensitivity and attenuate the effects of disturbances. Based on linear matrix inequalities (LMIs) techniques, a sufficient condition is derived such that the robust fault detection system is uniformly bounded mean-square stable and satisfies the prescribed H-infinity performance constraint. A numerical example is given to illustrate the effectiveness of the proposed method.