Mission Design of an Aperture-Synthetic Interferometer System for Space-Based Exoplanet Exploration  

作　　者：Feida Jia Xiangyu Li Zhuoxi Huo Dong Qiao 

机构地区：[1]School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration,Ministry of Industry and Information Technology,Beijing 100081,China [3]Qian Xuesen Laboratory of Space Technology,Beijing 100094,China

出　　处：《Space(Science & Technology)》2022年第1期297-306,共10页空间科学与技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12002028 and 51827806);Beijing Institute of Technology Research Fund Program for Young Scholars.

摘　　要：In recent years,exoplanet detection has become the technological frontier in the field of astronomy,because it provides evidence of the origin of life and the future human habitable exoplanet.Deploying several satellites to form an aperture-synthetic interferometer system in space may help discover“another Earth”via interferometry and midinfrared broadband spectroscopy.This paper analyzes a space-based exoplanet exploration mission in terms of the scientific background,mission profile,trajectory design,and orbital maintenance.First,the system architecture and working principle of the interferometer system are briefly introduced.Secondly,the mission orbit and corresponding transfer trajectories are discussed.The halo orbit near the Sun-Earth L2(SEL2)orbit is chosen as the candidate mission orbit.The low-energy transfer via stable invariant manifold with multiple perigees is designed,and the proper launch windows are presented.A speed increment less than 10 m/s is imposed for each transfer to achieve the insertion of the halo orbit.Finally,the tangent targeting method(TTM)is applied for high-precision formation maintenance with the whole velocity increments of less than 5×10^(−4)m/s for each spacecraft when the error bound is 0.1 m.The overall fuel budget during the mission period is evaluated and compared.The design in this paper will provide technical support and reliable reference for future exoplanet exploration missions.

关 键 词：PLANET Earth INTERFEROMETER 

分 类 号：V11[航空宇航科学与技术—人机与环境工程] V4