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失效卫星在轨消旋接触控制研究
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摘要
对于几°/s到几十°/s高速旋转的失效卫星,除了定轴转动,还可能附带章动,对导航测量以及抓捕任务带来了很大困难,对失效进行主动消旋降低其自旋角速度是对高速旋转目标成功抓捕的首要条件。本文研究对象是带柔性杆制成刷子的主动消旋卫星和带帆板的失效卫星,刷子与失效卫星的帆板接触,接触力由柔性杆的弯曲变形产生,包括接触对之间的压力和摩擦力。接触力可以降低失效卫星的自旋角速度达到给失效卫星消旋的目的。文中建立了接触动力学,基于接触动力学给出了前馈与反馈结合的控制方法,给出了仿真算例。
For disabled satellites tumbling at high speed(several or dozens of°/s), the movement can usually be divided into two parts, i.e.,the spinning around a fixed axis and the nutation, where the latter introduces challenge for guidance measurement and capturing task. The principal condition for capturing is to perform positive tumbling breaking such that the spinning velocity is reduced to the acceptable range. In this paper, we consider positive tumbling breaking satellites with flexible-link brushes. The contact force between the brush and the satellite includes the flexible force due to bend transform and the friction, which is utilized to achieve tumbling breaking by reducing the spinning velocity. Contact dynamics feedback and feedforword control is set up. Simulation of the contact problem is conducted.
引文
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