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In this paper, an active fault tolerant controller design approach is proposed for the satellite attitude systems with unknown exogenous disturbances and actuator multiple faults. First, the nonlinear satellite attitude dynamics equations with actuator faults are given. Next, a fault estimation observer is given so as to acquire the estimation value of unknown actuator faults. Then, a fault tolerant...
This paper presents a passive fault tolerant control for the satellite attitude systems with unknown external disturbance and actuator fault. Firstly, the nonlinear satellite attitude dynamics with actuator fault are given. Then, under the framework of backstepping control, a PI control with adaptive tuning gain is designed, which aims to provide added robustness in the presence of large and fast...
In this paper, an adaptive sliding mode observer based fault tolerant control (FTC) design method is proposed for the rigid satellite attitude control systems in actuator multiple fault case. The rigid satellite attitude control systems can be described by the dynamic equations and kinematic equations. The actuator fault model is given to represents the bias fault and loss of effectiveness fault....
This paper presents a robust sensor fault diagnosis and compensation scheme for satellite attitude dynamics with perturbations. The satellite attitude dynamics is linearized at the operating points with T-S fuzzy model. By introducing sensor fault as an auxiliary state vector, an augmented descriptor system is constructed. Fault diagnosis and estimation is achieved with a robust fuzzy descriptor observer...
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