Abstract
The spacecraft attitude tracking problem with exponential convergence and resilient control capability ensured is investigated. The system uncertainties induced by uncertain inertia and external disturbance, and the actuator uncertainties consisting of misalignment and faults, are addressed simultaneously. An observer-based exponential and resilient control scheme is presented. The closed-loop system is ensured to be stable that the attitude and the angular velocity tracking errors converge with an exponential rate to a small set with an arbitrary radius. The fast and high accuracy attitude tracking maneuver is accomplished. This resilient controller, characterized by a simple structure and less onboard computation, has great practical application potential. A rigid spacecraft example is shown to verify the effectiveness of the resilient solution with simulation and experimental results presented.
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