Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Development of CMG-Based Attitude Control M&S Software

제어모멘텀휠 기반 자세제어 M&S 소프트웨어 개발

  • Received : 2018.12.21
  • Accepted : 2019.03.20
  • Published : 2019.04.01
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Abstract

Attitude control modeling and simulation (M&S) can be extensively applied in overall development process, from simple algorithm design to on-board software verification. This paper introduces CMG-based attitude control M&S software, which consists of 6-DOF modeling (CMG and space environments modeling), and attitude control algorithm. The M&S software is divided into three modules, from an inner CMG motor control module to an outer earth observation mission module. While an application of this developed software is currently limited to the initial-phase attitude controller development, its application area can be extended to the later-phases by considering sophisticated model information in future.

자세제어 M&S(Modeling & Simulation)는 모델링 정밀도에 따라 간단한 자세제어 알고리즘 설계부터 실제 탑재 소프트웨어 검증까지 활용될 수 있다. 본 논문은 CMG 기반 위성 자세제어를 위한 M&S 소프트웨어를 소개한다. 개발된 소프트웨어는 크게 6자유도 모델링과 자세제어 알고리즘으로 나뉠 수 있다. 6자유도 모델링은 CMG 구동기 모델링과 우주환경 모델링(궤도외란/자세외란)을 포함한다. 자세제어 알고리즘은 CMG 모터속도 제어기(내부루프)부터 토크명령생성 및 스티어링 법칙(외부루프)을 포함한다. M&S는 하위 레벨인 CMG 모터제어부터 상위 레벨인 지구관측임무 수행까지 단계적으로 수행되며, 적용 레벨에 따라 3개 모듈로 나뉜다. 본 M&S 소프트웨어는 초기 자세제어 알고리즘 개발을 목표로 개발되었는데, 향후 상세한 위성체/구동기 모델링 및 우주환경 모델링을 반영해 점차 활용 범위를 넓힐 수 있을 것으로 기대된다.

Keywords

References

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