Authors

1 Department of Electrical Engineering, Faculty of Engineering, Quchan University of New Technologies Ghoochan. IRAN

2 Ferdowsi University of Mashhad, Electrical Engineering, Mashhad, IRAN

Abstract

In this paper, a continuous globally stable tracking control algorithm is proposed for spacecraft in the presence of unknown actuator failure. The design method is based on nonlinear dynamic inversion and  in contrast to traditional fault-tolerant control methods, the proposed controller does not require knowledge of the actuator faults and is implemented without explicit fault detection and isolation processes.  The stability proof is based on a Lyapunov analysis and the properties of the singularity free quaternion representation of spacecraft dynamics. Results of numerical simulations state that the proposed controller is successful in achieving high attitude performance in the presence of external disturbances and actuator failures.

Keywords

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