A robust fault detection (RFD) scheme for a class of multi time delay system is proposed in this paper. A time delay unknown input observer (TDUIO) is adopted as the residual generator. The key stage of the TDUIO desi...A robust fault detection (RFD) scheme for a class of multi time delay system is proposed in this paper. A time delay unknown input observer (TDUIO) is adopted as the residual generator. The key stage of the TDUIO design is to find a coordinate change such that in the new coordinates all the time delay terms in the system description are associated with the output only. Then the TDUIO can be completed by the method for common unknown input observer. Thus, a robust residual signal for RFD is generated, which is sensitive to faults while robust against unknown input (disturbance). The proposed method has been verified by a numerical example.展开更多
基金the National Natural Science Foundation of China (No. 60574081)
文摘A robust fault detection (RFD) scheme for a class of multi time delay system is proposed in this paper. A time delay unknown input observer (TDUIO) is adopted as the residual generator. The key stage of the TDUIO design is to find a coordinate change such that in the new coordinates all the time delay terms in the system description are associated with the output only. Then the TDUIO can be completed by the method for common unknown input observer. Thus, a robust residual signal for RFD is generated, which is sensitive to faults while robust against unknown input (disturbance). The proposed method has been verified by a numerical example.
