Estimation and reconstruction of multiple system, actuator and sensor faults in time-delayed linear systems

Abstract

Detection, isolation, and reconstruction of multiple system, actuator, and sensor faults in time-delayed linear systems are considered in this note. Based on an appropriate change of system coordinates; all system, actuator, and sensor faults are assigned to different subsystems of a time-delayed linear system. Then, using sliding mode observers and equivalent output error injection approaches, all faults are reconstructed separately. This results in reduced computational complexity. Finally, numerical simulation is used to show the feasibility and effectiveness of the proposed approach.