Dynamics of Variable-Length Tethered Formations near libration points
Dynamics of Variable-Length Tethered Formations near libration points
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DOI：
10.2514/1.47138
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发表时间：
2010-07
影响因子：
2.6
通讯作者：
Jun Zhao;Zhiqin Cai;Zhaohui Qi
中科院分区：
文献类型：
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作者：
Jun Zhao;Zhiqin Cai;Zhaohui Qi
给出了平动点附近多绳卫星编队的动力学特性。该系统由一颗母卫星和一颗子卫星组成，通过可变长度的系绳以轴辐式结构连接在一起。基于Hill近似，建立了非旋转系绳编队和旋转系绳编队的新的动力学公式。确定了系统的平衡位置，并对非旋转等长系绳系统进行了线性化分析。采用全非线性时变运动方程，对静止和重构阶段进行了数值仿真。对于非自转系统，在初始平衡位置较大时，母卫星的运动稳定性较差，展开时的系绳摆动比回收时的稳定。对于旋转系统，轨道振幅、轨道方向和质量比对系统的稳定性有一定的影响，与展开相比，回收更有利于保持系统的平面构形。
The dynamics of multitethered satellite formations near libration points are presented. The system consists of a parent satellite and subsatellites, connected together in a hub-spoke configuration via variable-length tethers. Based on Hill's approximation, a new dynamical formulation for nonrotating or rotating tethered formations is developed. The equilibrium positions are determined, and linearized analysis is performed for the nonrotating system with constant-length tethers. Numerical simulations using the full nonlinear and time-varying motion equations are carried out for the stationkeeping and reconfiguration stages. For nonrotating systems, the motion of the parent satellite is less stable for larger initial equilibrium positions during stationkeeping, and the tether librations during deployment are more stable than those during retrieval. For rotating systems, the orbital amplitude, orbital direction, and mass ratio have some impact on the stability of the system, and the retrieval is more conducive to keeping the system in its planar configuration when compared with the deployment.