不规则小行星引力场内的飞行动力学

李俊峰; 曾祥远

doi:10.6052/1000-0992-16-042

不规则小行星引力场内的飞行动力学

doi: 10.6052/1000-0992-16-042

李俊峰^1,,
曾祥远^2, ,

1.
清华大学航天航空学院, 北京 100084
2.
北京理工大学自动化学院, 北京 100081

详细信息

作者简介:
李俊峰, 1964年出生, 1987年获北京大学力学系学士学位, 1993年获莫斯科大学数学力学系博士学位, 1995年在清华大学工程力学系博士后出站, 现任清华大学航天航空学院教授.近30年从事航天动力学、运动稳定性、天体力学、卫星姿态控制、充液系统晃动等方面的科研工作, 主讲理论力学、运动稳定性、航天器动力学、飞行器姿态控制系统、高等动力学、现代航天技术概论等课程. E-mail: lijunf@tsinghua.edu.cn

通讯作者:
曾祥远, E-mail: zeng@bit.edu.cn

中图分类号: P185.7
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出版历程
- 收稿日期: 2016-11-15
- 网络出版日期: 2017-01-20
- 刊出日期: 2017-02-24

Flight dynamics in the gravitational fields of irregular asteroids

LI Junfeng^1
,,
ZENG Xiangyuan^{2
, ,}

1.
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
2.
School of Automation, Beijing Institute of Technology, Beijing 100081, China

More Information

Author Bio:
LI Junfeng, E-mail: lijunf@tsinghua.edu.cn

Corresponding author: ZENG Xiangyuan, E-mail: zeng@bit.edu.cn

摘要

摘要: 小行星探测是当前深空探测的主要方向之一, 具有重要的科学意义.绝大多数小行星引力场极不规则, 探测器在小行星附近运动形态复杂多样.由于同时受到中心引力、快速自旋的不规则形状摄动力、以及光压摄动等作用, 探测器容易与小行星发生碰撞或逃逸.概述小行星研究现状和不规则引力场建模方法.重点介绍不规则引力场内动力学特性, 包括引力平衡点、局部流形、自然周期轨道和悬停探测轨道等, 尝试提出新的研究方向.
- 小行星探测 /
- 不规则引力场 /
- 局部流形 /
- 周期轨道 /
- 悬停轨道
Abstract: Asteroid exploration is one of the main topics of deep space exploration, and has great scientific significance. Due to the irregular gravitational field of most asteroids, dynamical behaviors of spacecraft close to them are very complicated. Affected by the central gravity, the perturbing forces from the fast spin of the irregular shapes of asteroids, the solar radiation pressure force, etc., the spacecraft easily collide with the asteroids or escape from them. In this article, an overview of the status of asteroid research and the irregular gravitational field modeling methods is given. Particularly, this article focuses on the dynamic characteristics of irregular gravitational fields, including equilibrium points, local manifolds, natural periodic orbits and body-fixed hovering flights, and tries to propose new research directions.
- asteroid exploration /
- irregular gravitational field /
- local manifold /
- periodic orbits /
- body-fixed hovering

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图 1 人类航天器探测过的小天体等比缩放排列图

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图 2 小行星Itokawa不同引力场建模方法.(a) 级数展开法参考球, (b) 级数展开法参考椭球, (c) 质点群法示意图, (d) Itokawa多面体模型

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图 3 旋转偶极子近似细长小行星及其改进模型.(a) 偶极子近似Itokawa引力场, (b) 考虑二阶项的改进偶极子模型

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图 4 小行星Geographos引力场内周期轨道示例.(a) 共线平动点局部周期轨道, (b) 非共线平动点局部周期轨道, (c) 草帽轨道, (d) 类8字形轨道

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图 5 小行星引力场内太阳帆航天器本体悬停轨道.(a) 球形小行星附近悬停轨道, (b) 细长小行星本体悬停轨道

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