Multi-bound-dependent fault-tolerant control for flexible spacecraft under partial loss of actuator effectiveness
LI Tao
ZHANG Bin
QIAO Jian-zhong
Abstract：A fault tolerant control based on robust H-infinity control with uncertain parameters is proposed for an on-orbiting flexible spacecraft in the presence of partial loss of actuator effectiveness, external disturbance and input delays. Firstly, the fault tolerant control with loss of actuator effectiveness is transformed into robust control with uncertain parame-ters. Secondly, a new multi-bound-dependent robust state feedback H-infinity control algorithm is designed. This algorithm is not only dependent on the decomposition coefficient of the time delay integral inequality and time delay bounds, but also depends on the partial failure factor. Therefore, the controller designed in this paper can be sensitive to the input delays, be tolerant to actuator partial failure and be rejective to external disturbance. Finally, the effectiveness of the proposed design method is demonstrated in a spacecraft attitude control system subject to loss of actuator effectiveness.
Keywords：fault-tolerant controlflexible spacecraftinput delayspartial loss of actuator effectiveness
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 383-392 )