Attitude stabilization of slosh-coupled satellite with flexible appendage

J. E. Benmansour, B. Khouane
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引用次数: 1

Abstract

In this paper, a robust control scheme is proposed for flexible satellite attitude stabilization in the presence of multiple disturbances including the disturbances caused by flexible appendages with the sloshing dynamics of the liquid propellant and external disturbances from space environment. A composite control scheme is designed by combining a composite disturbance observer (CDO) with feed-forward controller. First, a CDO is constructed to estimate the lumped disturbances, where the lumped disturbances in the system are equivalent into two parts: a slow varying disturbance and periodic disturbance.  Then a PD controller is adopted to stabilize the system and restrain the residue disturbance. Finally, the simulation results for flexible satellite verify that the proposed method can make the satellite asymptotically stable and demonstrate the effectiveness of the proposed scheme.
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带有柔性附属物的晃动耦合卫星姿态稳定
本文提出了一种柔性卫星姿态稳定的鲁棒控制方案,该方案存在多种干扰,包括柔性附属物与液体推进剂的晃动动力学引起的干扰和空间环境的外部干扰。将复合扰动观测器与前馈控制器相结合,设计了一种复合控制方案。首先,构造了一个CDO来估计集总扰动,将系统中的集总扰动等效为慢变扰动和周期扰动两部分。然后采用PD控制器来稳定系统并抑制残留扰动。最后,对柔性卫星的仿真结果验证了所提方法能使卫星渐近稳定,验证了所提方案的有效性。
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