Journal of Space Technology and Applications (우주기술과 응용)

The Korean Space Science Society (한국우주과학회)
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A Study on the Method of Calculating the Launch Period of the Asteroid Exploration Mission

소행성 탐사선의 발사시기 산출 방안에 관한 연구

  • Received : 2021.10.12
  • Accepted : 2021.10.29
  • Published : 2021.11.30
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Abstract

A basic study was conducted on how to determine the launch timing of a space probe targeting an Earth-approaching asteroid. In the future, when a probe mission targeting an asteroid approaching Earth's orbit is conducted in Korea, in order to determine the launch time, an appropriate solution should be obtained by applying the Global Optimization technique. For this, accurate current orbit information of each asteroid must be obtained first, and prior scenarios such as Earth's orbit information, main engine performance information of the probe and launch vehicle, the number of gravity-assisted maneuvers, and maximum flight time limit should be discussed. Also, the criteria for optimization should be determined first. In this paper, based on these prerequisites and information, a method for finding the launch time of an asteroid probe was studied using the open source software such as PyKEP and Evolutionary Mission Trajectory Generator (EMTG) which are the programs for interplanetary trajectory generation purpose.

지구접근 소행성을 목적지로 하는 우주탐사선의 발사 시기를 결정하는 방법에 대하여 기본적인 연구를 수행하였다. 향후, 지구 궤도에 접근하는 소행성을 대상으로 하는 탐사선 임무가 국내에서 진행될 경우에 발사시기를 결정하기 위해서는 전역최적화(global optimization)기법을 적용하여 적절한 해를 구하여야 한다. 이를 위해서는 먼저 각 소행성들의 정확한 궤도 정보가 필요하고. 지구의 공전궤도 정보, 탐사선의 주엔진 성능 정보, 중력보조 기동의 횟수, 최대 비행시간 제한 등의 사전 시나리오가 논의되어야 한다. 또한 최적화의 기준이 우선 결정되어야 한다. 본 논고에서는 이러한 전제 조건과 정보를 바탕으로 PyKEP, EMTG(Evolutionary Mission Trajectory Generator) 등의 오픈소스 경로탐색 프로그램을 사용하여 소행성 탐사선의 발사 시기를 찾는 방안을 연구하였다.

Keywords

Acknowledgement

본 연구내용은 국가과학기술연구회의 지원으로, 한국항공우주연구원에서 주요 사업으로 수행한 "달 착륙 핵심기술 및 행성탐사 임무연구" 결과의 일부입니다.

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