空间控制技术与应用2025，Vol.51Issue(5)：26-37,12.DOI:10.3969/j.issn.1674-1579.2025.05.003
小天体进动轴方向估计方法研究
The Estimation of Asteroid Precession Axis Direction
摘要
Abstract
The rotational characteristics of deep space targets provide critical data for small celestial body exploration missions.This paper is mainly based on the long-distance detection phase of the deep space exploration mission.According to the constructed three-dimensional model of small celestial bodies and the observation image sequence of small celestial bodies,the direction vector of the precession axis and the direction vector of the rotation axis of small celestial bodies are estimated.This paper proposes a method for estimating the direction of the precession rotation center axis and the rotation axis of small celestial bodies.First,through the observation of image sequence,some feature points that can be observed in continuous observation images are selected.The pixel coordinates of these points,along with the camera's intrinsic and extrinsic parameters,are used within an optimization algorithm to solve for their 3D world coordinates,thereby reconstructing the body's motion trajectory.The equations that describe the relationship between the rotation and precession of a small body are formulated.Then the Gauss-Newton method is employed to estimate the rotation matrix of its precession.Subsequently,the Rodrigues'rotation formula is applied to determine the precession axis,from which the orientation of the rotation axis is derived.This approach provides essential precession and rotation parameters for future precise spacecraft navigation,landing,and surface sampling operations on the small celestial body.关键词
深空探测/小天体旋转特性/进动轴估计/自转轴估计/轴-角表示Key words
deep space exploration/rotation characteristics of small bodies/precession axis estimation/rotation axis estimation/axis-angle representation分类
航空航天引用本文复制引用
牛春阳,王慧瑶,赵巍,刘鹏..小天体进动轴方向估计方法研究[J].空间控制技术与应用,2025,51(5):26-37,12.基金项目
国家自然科学基金资助项目(62306088) National Natural Science Foundation of China(62306088) （62306088）
