Composite control method for stabilizing spacecraft attitude in terms of Rodrigues parameters

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Abstract

In this paper, the attitude stabilization problem of a rigid spacecraft described by Rodrigues parameters is investigated via a composite control strategy, which combines a feedback control law designed by a finite time control technique with a feedforward compensator based on a linear disturbance observer (DOB) method. By choosing a suitable coordinate transformation, the spacecraft dynamics can be divided into three second-order subsystems. Each subsystem includes a certain part and an uncertain part. By using the finite time control technique, a continuous finite time controller is designed for the certain part. The uncertain part is considered to be a lumped disturbance, which is estimated by a DOB, and a corresponding feedforward design is then implemented to compensate the disturbance. Simulation results are employed to confirm the effectiveness of the proposed approach. © 2013 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.

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Sun, H., & Li, S. (2013). Composite control method for stabilizing spacecraft attitude in terms of Rodrigues parameters. Chinese Journal of Aeronautics, 26(3), 687–696. https://doi.org/10.1016/j.cja.2013.04.032

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