低成本多小天体并行交会技术

小天体资源开发方兴未艾，为降低开发风险和成本，需要发射无人探测器交会观测多个待选目标小天体。传统多目标探测方案存在无法多次交会、成本高，周期长等不足。提出的低成本多小天体并行交会技术，能够对多小天体探测任务进行解耦，实现基于微纳飞行器的低成本多目标并行交会勘查，从而降低探测成本，缩短探测周期。该技术结合行星借力与不变流形机制构建了低能量星际转移方案。然后引入扰动流形思想，使微纳飞行器能够实现与目标小天体的快速交会。进一步，提出了一种多目标小天体探测全局搜索方法，该方法基于在日地halo轨道上停泊的微纳飞行器集群，逐次确定小天体探测目标，并利用上述方法完成了多微纳飞行器与多小天体的交会。数值仿真结果表明，该方案能够大幅度降低转移过程的燃料消耗，并缩短转移时间。

Low-Cost and Multi-Objective Asteroid Transfer Trajectory Design

To reduce the total cost and risk of asteroid exploration,it is necessary to select multi-objective to avoid the disadvantages such as single target,high-cost and long-period. In this paper,a multi-target transfer trajectory design method is proposed based on the cubesats with the cooperation of gravity flyby and invariant manifolds. Introduced by the perturbation invariant manifolds,the cubesat can rapidly transfer to the target and carry out a global launch chance searching for asgteroids based on the Sun-Earth Halo parking orbit and determine the next target. The results indicated that the proposed method is able to significantly reduce the fuel consumption of trajectory transfer as well as transfer time.