Control Performance-Based Fault-Tolerant Control Strategy for Singular Systems

This paper is concerned with a control performance-based fault-tolerant control strategy for singular systems in presence of multiplicative faults. To be specific, the observer-based realization of Youla parameterization is first addressed for singular systems. Then the fault-tolerant margin for closed-loop systems is studied and further modified to bring forth the stability margin degradation, which serves as an indicator for the performance change caused by the faults in the closed-loop. Based on it, a control performance-based fault detection scheme is realized, aiming at detecting those faults that may affect the system stability. Controller reconstruction rule is given afterwards to ensure the system performance when fault occurs. A circuit system model is finally provided to illustrate the validness of the derived control scheme.