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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Maneuverability Analysis for Spacecraft Installed With CMGs

제어모멘트자이로를 장착한 위성의 기동성능 분석

  • Received : 2021.12.30
  • Accepted : 2022.03.18
  • Published : 2022.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper addresses the Feasible Angular Momentum(FAM) chart that can be used as an indicator for maneuverability analysis of spacecraft installed with control moment gyros(CMGs). Recently, as the demands for high agility of spacecraft has been increasing in order to perform the space mission given to spacecraft more effectively, interest in CMGs, which is a high torque generator is increasing. However, since the CMG has a singularity problem that does not generate the control torque in the specific directions, in this paper, we consider the two pairs of parallel control moment gyros(TPCMGs) that follows the roof-type configuration. The Gimbal space was newly defined except for the space where singularity can be generated and the space where torque error is generated due to the hardware limits. The feasible angular momentum space is defined as a FAM chart, and it is very meaningful that it is possible to analyze the spacecraft's rotational maneuverability effectively by deriving the spacecraft's 3-axis parameters in the corresponding gimbal space mathematically.

본 논문은 제어 모멘트 자이로를 장착한 위성의 효율적인 기동성능 분석을 위한 지표로 활용되고 있는 유효 각운동량 차트(FAM Chart)를 설계 및 분석한다. 최근 인공위성의 고기동성에 대한 요구가 증가함에 따라 위성에게 주어진 임무를 보다 효과적으로 수행하기 위하여 고 토크 발생기인 제어 모멘트 자이로(CMGs)에 대한 관심이 상승하고 있는 추세이다. 다만 CMG는 특정 방향으로 제어 토크가 발생하지 않는 특이점 문제가 존재하므로 이를 개선하기 위하여 본 논문은 지붕형 배치를 따르는 두 쌍의 제어 모멘트 자이로(TPCMGs)를 장착한 위성 시스템에 대하여 고려하였으며, 특이점 발생 가능 공간 및 구동기 제한으로 인한 토크 오류 발생 공간을 제외한 김벌 공간을 새롭게 정의하여 이에 따른 유효 각운동량 공간을 FAM 차트라 칭함으로써, 해당 공간 내의 위성 3축 파라미터들을 수학적으로 도출해낼 수 있으므로 효과적인 위성 기동성능 분석이 가능함에 의의가 있다.

Keywords

Acknowledgement

이 논문은 2019년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2019R1I1A3A03041160).

References

  1. Mok, S. H. Bang, H. C. and Kim, H. S., "Analytical Solution for Attitude Command Generation of Agile Spacecraft," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 46, No. 8, 2018, pp. 639~651. https://doi.org/10.5139/JKSAS.2018.46.8.639
  2. Leeghim, H., Lee, C. Y., Jin, J. H. and Kim, D. H., "A Singularity-free Steering Law of Roof Array of Control Moment Gyros for Agile Spacecraft Maneuver," International Journal of Control, Automation and System, Vol. 18, No. 7, 2020, pp. 1679~1690. https://doi.org/10.1007/s12555-019-0008-6
  3. Lee, S. W., Seo, H. H. and Yoon, H. J., "Agile Attitude Control of Small Satellite using 5Nm Small CMG," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 46, No. 11, 2018, pp. 952~960. https://doi.org/10.5139/JKSAS.2018.46.11.952
  4. Junkins, J. L. and Schaub, H., Analytical Mechanics of Space Systems, American Institute of Aeronautics and Astronautics, 2009.
  5. Wie, B., "Space Vehicle Dynamics and Control," American Institute of Aeronautics and Astronautics, 2008.
  6. Kurokawa, H., "A Geometric Study of Single Gimbal Control Moment Gyros-Singularity and Steering Law [Dissertation]," The University of Toryo, 1997.
  7. Wie, B., "Singularity Analysis and Visualization for Single-gibmal Control Moment Gyro Systems," Journal of Guidance, Control, and Dynamics, Vol. 27, No. 2, 2004, pp. 271~282. https://doi.org/10.2514/1.9167
  8. Yoon, H. J. and Tsiotras, P., "Singularity Analysis of Variable Speed Control Moment Gyros," Journal of Guidance, Control, and Dynamics, Vol. 27, No. 3, 2004, pp. 374~386. https://doi.org/10.2514/1.2946
  9. Schaub, H. and Junkins, J. L., "Singularity Avoidance Using Null Motion and Variable-speed Control Moment Gyros," Journal of Guidance, Control, and Dynamics, Vol. 23, No. 1, 2000, pp. 11~16. https://doi.org/10.2514/2.4514
  10. Leeghim, H., Jin, J. H. and Mok, S. H., "Feasible Angular Momentum of Spacecraft Installed with Control Moment Gyros," Advances in Space Research, Vol. 61, No. 11, 2018, pp. 934~943.
  11. Crenshaw, J., "2-SPEED a Single-gimbal Control Moment Gyro Attitude Control System," Guidance and Control Conference, 1973, p. 895.