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Robust Finite Time Control for Stabilization of Rigid Spacecraft

机译:坚固的刚性航天器稳定的有限时间控制

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This paper investigates finite-time attitude stabilization of a rigid spacecraft in presence of external disturbance and model uncertainties. Based on Modified Rodriguez parameters (MRPs), attitude kinematics and dynamics are converted into state-space-like form, and then robust finite-time controller is designed for attitude stabilization of a rigid spacecraft. Furthermore, smooth second order sliding mode and disturbance observer, by virtue of geometric homogeneity, are employed to construct finite time attitude stabilizer, which eliminates the chattering phenomenon and the requirement of the upper bounds of the total uncertainties. Simulation results are provided to demonstrate the effectiveness of the proposed attitude controllers.
机译:本文调查了在外部干扰和模型不确定性存在下刚性航天器的有限态度稳定。 基于改进的Rodriguez参数(MRPS),态度运动学和动力学被转换成状态式形式,然后设计了坚固的有限时间控制器,用于刚性航天器的姿态稳定。 此外,通过几何均匀性,使用平滑的二阶滑动模式和干扰观察器来构建有限时间姿态稳定器,其消除了喋喋不休的现象和总不确定性的上限的要求。 提供了仿真结果以证明所提出的态度控制器的有效性。

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