A comparative assessment of gravitational field modeling methods for binary asteroid landing

作     者：Tongge Wen Xiangyuan Zeng Ziwen Li Yang Yu Tongge Wen;Xiangyuan Zeng;Ziwen Li;Yang Yu

作者机构：School of AutomationBeijing Institute of TechnologyBeijing100081China School of Aeronautic Science and EngineeringBeihang UniversityBeijing100191China 

出 版 物：《Astrodynamics》 (航天动力学（英文）)

年 卷 期：2024年第8卷第3期

页      面：417-435页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.12222202 and 11972075) 

主　　题：landing dynamics contact dynamics gravitational field modeling binary asteroid 

摘      要：The tradeoff between accuracy and efficiency in gravitational field modeling for binary asteroid landing is one of the challenges in dynamical *** representative gravitational modeling methods are employed and compared in this *** are the sphere-sphere model,ellipsoid-sphere model,inertia integral-polyhedron method,and finite element *** study considers the differences between these four models,particularly their effects on the landing dynamics of a lander.A framework to simulate the coupled orbit-attitude motion of a lander in a binary system is first *** simulations are then performed on the natural landings on the second primary of the(66391)Moshup-Squannit *** results show significant differences in the final landing dispersions,settling time,and sliding distance when applying the simplified *** the basis of the modeling accuracy and computational efficiency,the finite element method should be chosen for future missions.