空间碎片的数量不断增长导致在轨航天器碰撞事件频发,对人类探索宇宙的航天事业造成了巨大阻碍.分析当前空间碎片分布情况,以较少空间碎片分布密集区域发生的碰撞事件为目标,从在轨碎片中初步选择一组碎片作为清除目标.根据DBSCAN(densi...空间碎片的数量不断增长导致在轨航天器碰撞事件频发,对人类探索宇宙的航天事业造成了巨大阻碍.分析当前空间碎片分布情况,以较少空间碎片分布密集区域发生的碰撞事件为目标,从在轨碎片中初步选择一组碎片作为清除目标.根据DBSCAN(density-based spatial clustering of applications with noise)聚类算法以碎片间所需的燃料消耗作为碎片特征信息,遵循碎片到周边满足燃料消耗要求的碎片数量标准确定碎片核心对象同时划分簇.通过卫星星座中各卫星释放空间飞行器到各碎片附近所需的燃料消耗情况选出与簇数相等的卫星,根据解决指派问题的匈牙利算法确定卫星-碎片簇清除任务,并且空间飞行器可在任务分配的具体簇中实现一对多碎片核心对象的清除任务.展开更多
There are plentiful asteroids moving periodically around their central primaries, such as the Sun. Due to the perturbation of the central primary, the gravitational force of the perturbed asteroid system varies period...There are plentiful asteroids moving periodically around their central primaries, such as the Sun. Due to the perturbation of the central primary, the gravitational force of the perturbed asteroid system varies periodically. In this paper, based on the idea of integrating the solar gravitational force as a part of the system instead of treating it as perturbation, the parametric resonance response is investigated. A novel type of stable parametric resonance orbits has been detected. It is found that the steady-state motion amplitude of parametric resonance orbit is determined by the frequency-response equation. The stability of the novel orbits has also been demonstrated. The new type of orbits may contribute to possible asteroid exploration missions.展开更多
文摘空间碎片的数量不断增长导致在轨航天器碰撞事件频发,对人类探索宇宙的航天事业造成了巨大阻碍.分析当前空间碎片分布情况,以较少空间碎片分布密集区域发生的碰撞事件为目标,从在轨碎片中初步选择一组碎片作为清除目标.根据DBSCAN(density-based spatial clustering of applications with noise)聚类算法以碎片间所需的燃料消耗作为碎片特征信息,遵循碎片到周边满足燃料消耗要求的碎片数量标准确定碎片核心对象同时划分簇.通过卫星星座中各卫星释放空间飞行器到各碎片附近所需的燃料消耗情况选出与簇数相等的卫星,根据解决指派问题的匈牙利算法确定卫星-碎片簇清除任务,并且空间飞行器可在任务分配的具体簇中实现一对多碎片核心对象的清除任务.
基金supported in part by the National Natural Science Foundation of China(Project Nos.11772009,11972007 and 11832002)the Beijing Municipal Natural Science Foundation(Project No.1192002)the International Research Cooperation Seed Fund of Beijing University of Technology(No.2018B15)。
文摘There are plentiful asteroids moving periodically around their central primaries, such as the Sun. Due to the perturbation of the central primary, the gravitational force of the perturbed asteroid system varies periodically. In this paper, based on the idea of integrating the solar gravitational force as a part of the system instead of treating it as perturbation, the parametric resonance response is investigated. A novel type of stable parametric resonance orbits has been detected. It is found that the steady-state motion amplitude of parametric resonance orbit is determined by the frequency-response equation. The stability of the novel orbits has also been demonstrated. The new type of orbits may contribute to possible asteroid exploration missions.
