基于平动点的低能量转移轨道设计方法
首发时间:2014-01-09
摘要:研究了基于三体系统平动点的低能量转移轨道设计问题.首先,基于三体系统分析了平动点附近的周期轨道及其不变流形结构.然后,利用周期轨道延伸于地球附近的稳定流形实现从地球停泊轨道向平动点附近周期轨道的转移,通过周期轨道向外延伸的不稳定流形实现星际飞行.最后,以2008EA9和99942Apophis小行星为例,在三体系统星历模型下,基于日-地L2点Halo轨道不变流形结构,设计了小天体交会探测和飞越探测的轨道,验证了该设计方法的有效性.
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Design Method of Low-energy Transfer Trajectory on Basis of Libration Point
Abstract:The design problem of low-energy transfer trajectory in three-body system is investigated. Firstly, the periodic orbits and invariant manifolds sturctures associated with three-body system and libration points are analyzed. Then the transfer trajectory from orbit around Earth to periodic orbits is designed by using the stable manifolds. the interplanetary flight is carried out by the unstable manifolds of periodic orbits. Finally, taking the 2008EA9 and 99942 Apophis asteroid as an example, the rendezvous trajectory and flyby trajectory via invariant manifolds associated to L2 point of Earth-Sun system is designed. it shows that the the effectiveness of the proposed method.
Keywords: Three-body problem Libration points Invariant manfiods Transfer trajectory Asteroid exploration
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