The problem of designing an observer-based fault-tolerant control allocation mechanism for a multi-input multi-output(MIMO)uncertain descriptor system(DS)subjected to actuator faults/failures and external uncertaintie...The problem of designing an observer-based fault-tolerant control allocation mechanism for a multi-input multi-output(MIMO)uncertain descriptor system(DS)subjected to actuator faults/failures and external uncertainties is discussed in this paper.The proposed approach guarantees system performance and closed-loop stability using the integral sliding mode control(ISMC)and a fixed control allocation(CA)strategy.A robust sliding mode observer(SMO)is designed to estimate the states of the DS in a realistic setting.The sliding surface is constructed with the estimated states,following the ISMC principle.To meet the admissibility conditions of DS,a multivariable super-twisting sliding mode control(STSMC)algorithm is designed.The CA technique reallocates the control effort to the remaining healthy actuators on the occurrence of any fault/failure.Lyapunov-based stability is established for the closed-loop system with the controller–observer pair.Finally,the proposed design is validated by evaluating various actuator fault/failure situations.展开更多
文摘The problem of designing an observer-based fault-tolerant control allocation mechanism for a multi-input multi-output(MIMO)uncertain descriptor system(DS)subjected to actuator faults/failures and external uncertainties is discussed in this paper.The proposed approach guarantees system performance and closed-loop stability using the integral sliding mode control(ISMC)and a fixed control allocation(CA)strategy.A robust sliding mode observer(SMO)is designed to estimate the states of the DS in a realistic setting.The sliding surface is constructed with the estimated states,following the ISMC principle.To meet the admissibility conditions of DS,a multivariable super-twisting sliding mode control(STSMC)algorithm is designed.The CA technique reallocates the control effort to the remaining healthy actuators on the occurrence of any fault/failure.Lyapunov-based stability is established for the closed-loop system with the controller–observer pair.Finally,the proposed design is validated by evaluating various actuator fault/failure situations.
