Robust Fault Tolerant Control for Spacecraft Attitude Stabilization under Actuator Faults and Bounded Disturbance
B Xiao, QL Hu (Harbin Institute of Technology, China) & MI Friswell (Swansea University)
ASME Journal of Dynamic Systems, Measurement and Control, Vol. 133, No. 5, September 2011, paper 051006
This paper investigates the design of spacecraft attitude stabilization controllers that are robust against actuator faults and external disturbances. A nominal controller is developed initially, using the adaptive backstepping technique, to stabilize asymptotically the spacecraft attitude when the actuators are fault-free. Additive faults and the partial loss of actuator effectiveness are considered simultaneously and an auxiliary controller is designed in addition to the nominal controller to compensate for the system faults. This auxiliary controller does not use any fault detection and isolation mechanism to detect, separate and identify the actuator faults online. The attitude orientation and angular velocity of the closed-loop system asymptotically converge to zero despite actuator faults providing the nominal attitude system is asymptotically stable. Numerical simulation results are presented that demonstrate the closed-loop performance benefits of the proposed control law and illustrate its robustness to external disturbances and actuator faults.
This material has been published in the ASME Journal of Dynamic Systems, Measurement and Control, Vol. 133, No. 5, September 2011, paper 051006, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the ASME.
Link to paper using doi: 10.1115/1.4004061
ASME Journal of Dynamic Systems, Measurement and Control