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An adaptive robust integrated power and attitude control system (IPACS) is presented for a variable speed control moment gyroscope (VSCMG)-actuated satellite. The developed IPACS method is capable of achieving precision attitude control while simultaneously achieving asymptotic power tracking for a rigid-body satellite in the presence of dynamic uncertainty in the VSCMG gimbals and wheels. In addition,...
A sliding mode controller with the adaptive parameters is proposed for a class of uncertain nonlinear systems such that the sliding mode parameter lambda , the approximate sign function parameter mu , the tendency rate k0 and the gain parameter eta be scheduled by the system states. Meanwhile, the obtained systems have the desired stable sliding mode motions with the appropriate parameters lambda...
A robust adaptive neural network control scheme is proposed for a class of strict-feedback nonlinear systems with unknown control directions and unmodeled dynamics. The proposed design method expands the class of nonlinear systems for which robust adaptive control approaches have been studied. A priori knowledge of the signs of the control directions is not required. It is proved that under the proposed...
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