Generalized flyby trajectories around elongated minor celestial bodies as a rotating mass dipole  

作　　者：Xiangyuan Zeng Baodong Fang Junfeng Li Yang Yu 

机构地区：[1]School of Aerospace Engineering, Tsinghua University,Beijing 100084, China [2]Shanghai Satellite Engineering Research Institute,Shanghai 200240, China [3]Observatoire de la Cote d'Azur, 06300 Nice, France

出　　处：《Acta Mechanica Sinica》2016年第3期535-545,共11页力学学报（英文版）

基　　金：supported by the National Basic Research Program of China(973 Program),(Grant 2012CB720000);China Postdoctoral Science Foundation(Grant 2014M560076);Support from Shanghai Satellite Engineering Research Institute(Grant 13dz2260100)is also acknowledged

摘　　要：The aim of this paper is to understand the common characteristics of the generalized flyby trajectory around natural elongated bodies. Such flyby trajectories provide a short-term mechanism to clear away vicinal objects or temporally capture ejecta into circling orbits. The gravitational potential of elongated bodies is described by a unified approximate model, i.e., the rotating mass dipole which is two point masses connected with a constant massless rod The energy power is used to illustrate the flyby effect in terms of the instantaneous orbital energy. The essential of the single flyby trajectory is studied analytically, and the relationship between the flyby trajectory and its Jacobi integral is also illustrated. Sample trajectories are given to show the variational trend of the energy increment with respect to differen orbital periapsides. The distribution of natural ejecting orbits is presented by varying the parameters of the approximate model.The aim of this paper is to understand the common characteristics of the generalized flyby trajectory around natural elongated bodies. Such flyby trajectories provide a short-term mechanism to clear away vicinal objects or temporally capture ejecta into circling orbits. The gravitational potential of elongated bodies is described by a unified approximate model, i.e., the rotating mass dipole which is two point masses connected with a constant massless rod The energy power is used to illustrate the flyby effect in terms of the instantaneous orbital energy. The essential of the single flyby trajectory is studied analytically, and the relationship between the flyby trajectory and its Jacobi integral is also illustrated. Sample trajectories are given to show the variational trend of the energy increment with respect to differen orbital periapsides. The distribution of natural ejecting orbits is presented by varying the parameters of the approximate model.

关 键 词：Generalized flyby trajectory Natural elongated body Rotating mass dipole Natural ejecting orbits 

分 类 号：O314[理学—一般力学与力学基础]