TY - GEN
T1 - Output Feedback-Based Refined Fault-Tolerant Control for Drag-Free Satellites with Disturbance
AU - Meng, Yan
AU - Yang, Yongjian
AU - Zhu, Yukai
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this paper, an output feedback-based refined fault-Tolerant control strategy for drag-free satellites is investigated to counteract actuator fault and disturbance. The coupling of disturbance and fault in the same channel will affect the reliability of fault diagnosis and the control precision of drag-free satellites. Therefore, an observer-based method is designed to realize the fault diagnosis by the separation estimation of disturbance and fault, even though the relative velocity information is not measurable. More specifically, according to the modellable characteristics of disturbance and the non-modellable characteristics of actuator fault, a reduced-order state observer (ROSO) is designed to estimate the disturbance and the relative velocity information, and an extended state observer (ESO) is designed to estimate the actuator fault. Then, by incorporating a sliding mode controller, a composite control law is proposed to enhance the anti-disturbance and fault-Tolerant capability of satellites. Finally, numerical simulations are performed to demonstrate the effectiveness of the proposed strategy.
AB - In this paper, an output feedback-based refined fault-Tolerant control strategy for drag-free satellites is investigated to counteract actuator fault and disturbance. The coupling of disturbance and fault in the same channel will affect the reliability of fault diagnosis and the control precision of drag-free satellites. Therefore, an observer-based method is designed to realize the fault diagnosis by the separation estimation of disturbance and fault, even though the relative velocity information is not measurable. More specifically, according to the modellable characteristics of disturbance and the non-modellable characteristics of actuator fault, a reduced-order state observer (ROSO) is designed to estimate the disturbance and the relative velocity information, and an extended state observer (ESO) is designed to estimate the actuator fault. Then, by incorporating a sliding mode controller, a composite control law is proposed to enhance the anti-disturbance and fault-Tolerant capability of satellites. Finally, numerical simulations are performed to demonstrate the effectiveness of the proposed strategy.
KW - Drag-free satellites
KW - extended state observer
KW - fault-Tolerant control
KW - output feedback-based control
KW - reduced-order state observer
UR - https://www.scopus.com/pages/publications/85173618647
U2 - 10.1109/CFASTA57821.2023.10243308
DO - 10.1109/CFASTA57821.2023.10243308
M3 - 会议稿件
AN - SCOPUS:85173618647
T3 - Proceedings of the 2nd Conference on Fully Actuated System Theory and Applications, CFASTA 2023
SP - 409
EP - 414
BT - Proceedings of the 2nd Conference on Fully Actuated System Theory and Applications, CFASTA 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd Conference on Fully Actuated System Theory and Applications, CFASTA 2023
Y2 - 14 July 2023 through 16 July 2023
ER -