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Attitude alignment control in spacecraft flying without the measurement of angular velocity is proposed with actuator saturation. First an auxiliary quaternion dynamical system is defined, and then we presented a nonlinear feedback control law within real and estimated error of unit-quaternion and the relative error unit-quaternion between each spacecraft. In this approach, an output saturation function...
In this paper, an intelligence control is develope for a flexible spacecraft with rapid stabilization. The proposed control is comprised of a neural controller and a slide controller. The self-organizing CMAC controller is utilized to overcome influence with uncertain system parameter, while the slide control law is proposed to achieve system stability. Finally, the simulation results of the flexible...
In this paper a result on attitude tracking problem of mobile robot without velocity measurement and within the physical limits of actuator by the development of a novel Lyapunov function based on quaternion feedback is presented. The attitude of the rigid body is represented by unit quaternion, and introduces an auxiliary dynamical system whose output is used in the attitude tracking error. The analysis...
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