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An adaptive actuator failure compensation scheme is developed for attitude tracking control of a spacecraft with four reaction momentum wheels, in the presence of unknown spacecraft inertia parameters, nonlinear dynamics of wheel angular momentum and uncertain actuator failures. The proposed scheme employs a composite adaptive control design which incorporates an adaptive backstepping feedback control...
Based on fuzzy control technique, the fault-tolerant sliding mode control problem is investigated for near space vehicle (NSV) attitude dynamics in this paper. Firstly, the nonlinear dynamics of NSV is given. Then, T-S fuzzy model for NSV with additive actuator fault is established. The fuzzy sliding surfaces for NSV is designed by using a Lyapunov function, and the fuzzy fault-tolerant sliding mode...
This paper first develops the six degrees of freedom (DOF) nonlinear dynamic model of near space vehicle (NSV) in re-entry trajectory and analyzes its model characteristics and aerodynamic parameters, then the linear model is obtained using trim technique. The problem of fault estimation based on adaptive fault diagnosis observer is studied, which can achieve accurate estimation of fault and give...
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