The Fast Generation of the Reachable Domain for Collision-Free Asteroid Landing

被引:2
|
作者
Zhao, Yingjie [1 ]
Yang, Hongwei [1 ]
Hu, Jincheng [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Coll Astronaut, Nanjing 211106, Peoples R China
基金
中国国家自然科学基金;
关键词
collision-free asteroid landing; given time of flight; reachable domain; section and expansion method; trajectory optimization; TRAJECTORY OPTIMIZATION; SPACECRAFT;
D O I
10.3390/math10203763
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
For the mission requirement of collision-free asteroid landing with a given time of flight (TOF), a fast generation method of landing reachable domain based on section and expansion is proposed. First, to overcome the difficulties of trajectory optimization caused by anti-collision path constraints, a two-stage collision-free trajectory optimization model is used to improve the efficiency of trajectory optimization. Second, the velocity increment under a long TOF is analyzed to obtain the distribution law of the reachable domain affected by the TOF, and the generation problem of the reachable domain is transformed into the solution problem of the initial boundary and the continuous boundary. For the initial boundary, the section method is used to acquire a point on the boundary as the preliminary reachable domain boundary. The solution of continuous boundary is based on the initial boundary continuously expanding the section into the reachable domain until the boundary is continuous. Finally, the proposed method is applied to the asteroids 101955 Bennu and 2063 Bacchus. The simulation results show that this method can quickly and accurately obtain the reachable domain of collision-free asteroid landing in a given TOF and is applicable to different initial positions.
引用
收藏
页数:20
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