Adaptive predefined-time control for liquid-filled flexible spacecraft attitude stabilization during orbit maneuver |
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Institution: | 1. Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Shanghai Aerospace Control Technology Institute, Shanghai 201114, China |
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Abstract: | A predefined-time attitude stabilization for complex structure spacecraft with liquid sloshing and flexible vibration is investigated under input saturation during orbital maneuver. First, the attitude dynamics model of liquid-filled flexible spacecraft is constructed. Meanwhile, the influence of solar panel vibration and liquid sloshing is treated as a disturbance in the controller design. Next, an adaptive predefined-time control scheme is proposed by applying sliding mode control theory. A predefined-time convergent sliding surface and reaching law are designed to ensure the predefined-time fast convergence rate. Furthermore, a novel adaptive algorithm is developed to handle the disturbances from liquid sloshing and flexible vibration, ensuring that the system converges to a small neighborhood of the equilibrium. Additionally, a new auxiliary system is constructed to deal with the effects of input saturation. At last, one simulation case is performed to verify the feasibility and advantages of the proposed algorithm. |
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Keywords: | Predefined-time control Liquid sloshing and flexible vibration Input saturation Sliding mode control Adaptive control |
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