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This paper addresses the spacecraft attitude stabilization problem under disturbances as well as friction of reaction wheel and no angular velocity measurement. In order to achieve rapid stabilization in such severe situations, a finite-time angular velocity observer is proposed. At first, establishing the rigid spacecraft dynamics considering friction torque of reaction wheel and external disturbances...
This paper studies the stabilization of three-axis magnetic attitude control systems by bounded controls. The aim of this paper is to design both reduced-order observer and finite-time observer based output feedback stabilizing controllers. The gains in the controllers are designed explicitly and the global stability of the closed-loop system is proven by constructing explicit Lyapunov functions....
This paper investigates the finite-time output feedback stabilization of rigid body attitude dynamics without velocity measurement on the special orthogonal group ( SO(3)). We first transform the stabilization problem on SO(3) into the stabilization issue on its Lie algebra ( so(3)) via the logarithm map. The proposed approach consists of exponential coordinates of SO(3) and the output of a nonlinear...
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