AnControlMethodofArbitraryRelativeTrajectoryfor-深空探测学报.DOC

强不规则天体引力场中的动力学研究进展 姜宇1,2 宝音贺西2 宇航动力学国家重点实验室，西安 710043 2.清华大学航天航空学院，北京 100084 摘 要。 关键词： 中图分类号: V4.2 文献标识码：AResearch trend of dynamics in the gravitational field of irregular celestial body Jiang Yu1,2 Baoyin Hexi2 1. State Key Laboratory of Astronautic Dynamics, Xi’an Satellite Control Center, Xi’an 710043, China 2. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China Abstract: Asteroid exploration and comet exploration are both important areas in the deep space exploration. The mass of an asteroid or a comet is not big enough such that the gravitational force is much smaller than the stress to satisfy the hydrostatic equilibrium, which makes the minor celestial body irregular-shaped. The research of dynamical behaviours and mechanisms in the gravitational field of irregular celestial body is the basis of minor celestial body exploration, including the catching of the explorer and the design of the orbit around the minor celestial body. This paper summarized the research progress of the dynamics in the gravitational field of irregular celestial body through gravitational models and dynamical mechanisms. The research situation of gravitational models such as the Legendre polynomial model, the simple-shaped model and the polyhedron model are presented. In addition, the research situation of dynamical mechanisms such as the periodic orbits and quasi-periodic orbits, equilibrium points, manifolds, bifurcations and resonances, chaos, are also presented. Besides, we analyzed key points and the difficult points of these researches. Finally, the research trend of the dynamics in the gravitational field of irregular celestial body is discussed. Key words: Irregular celestial body, asteroid exploration, comet exploration, astronautic dynamics, dynamical law 1　引言 自古以来，人类从未放弃太空探索的梦想。从神话传说中的嫦娥奔月、夸父逐日，到敦煌壁画飞天；从帝尧陶唐氏的“梦攀天而上伊挚将应汤命，梦乘船过日月之傍2014 HL129的直径只有约7.6米，也被称为小行星[40]。一般直径在100米以上的小行星能提供足够的引力使得探测器可以环绕该小行星飞行从而成为其卫星，例如阿波罗双小行星2003SS84的直径[41,42]仅