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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.
Asteroid exploration is one of the main directions of current deep space exploration, which is of important scientific significance.Most of asteroid gravitation fields are extremely irregular, and the movement of the detector around the asteroid is complex and diverse.Due to being subjected to central gravity at the same time, Irregular shape perturbation, and perturbation of light pressure, the detector can easily collide with or escape from the asteroid.Considering the research status of asteroids and the modeling method of irregular gravitation field, we mainly introduce the dynamics of irregular gravitation Characteristics, including the point of gravity balance, local manifolds, natural periodic orbit and hovering orbitals, etc., try to put forward new research directions.