Fault reconstruction based on sliding mode observer for linear descriptor systems

Fault detection and reconstruction of actuator and sensor faults for descriptor systems based on a sliding mode observer is considered. The existence conditions and design algorithm of sliding mode observer for linear descriptor systems with actuator faults are given. By the introduction of suitable filters, the sensor faults is treated as actuator faults. By analysis, the method is extended to the case of the general descriptor systems and the existence conditions are given. With simulation, the effectiveness of the design technique is illustrated.