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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Fault Diagnosis of High-Speed Rotating Machinery With Control Moment Gyro for Medium and Large Satellite Using Envelope Spectrum Analysis

포락선 스펙트럼 분석을 이용한 중대형 위성용 제어모멘트자이로의 고속회전체 고장진단

  • Kang, Jeong-Min (Mechanical R&D Lab and Seeker & EO/IR R&D Lab, LIG NEX1) ;
  • Song, Tae-Seong (Mechanical R&D Lab and Seeker & EO/IR R&D Lab, LIG NEX1) ;
  • Lee, Jong-Kuk (Mechanical R&D Lab and Seeker & EO/IR R&D Lab, LIG NEX1) ;
  • Song, Deok-Ki (Mechanical R&D Lab and Seeker & EO/IR R&D Lab, LIG NEX1) ;
  • Kwon, Jun-Beom (Mechanical R&D Lab and Seeker & EO/IR R&D Lab, LIG NEX1) ;
  • Lee, Il (Defense Industry Technology Center, Agency for Defense Development) ;
  • Seo, Joong-Bo (Defense Industry Technology Center, Agency for Defense Development)
  • Received : 2022.02.03
  • Accepted : 2022.04.04
  • Published : 2022.06.01
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Abstract

In this paper, the fault analysis of the momentum wheel, which is a high-speed rotary machinery of 'Control Moment Gyro' for medium and large satellite, was described. For fault diagnosis, envelope spectrum analysis was performed using Hilbert transformation method and signal demodulation method to find the impact signals periodically generated from amplitude modulated signals. Through this, the fault of the momentum wheel was diagnosed by analyzing whether there was a harmonic component of the rotational frequency and a bearing fault frequency in a specific frequency band with a high peak.

본 논문에서는 중대형 위성용 '제어모멘트자이로'의 고속회전체인 모멘텀 휠의 고장 분석에 대해 기술하였다. 고장 분석을 위해 변조된 신호에서 주기적으로 발생되는 충격신호를 찾기 위해 힐베르트 변환 기법과 신호 복조 기법을 사용한 포락선 스펙트럼 분석을 하였다. 이를 통해 높은 신호의 크기를 가지는 특정 주파수 밴드에서 회전주파수의 조화 성분과 베어링 결함 주파수가 있는지 분석하여 모멘텀 휠의 고장을 진단하였다.

Keywords

Acknowledgement

본 연구는 방산기술지원센터 주관의 국방무기체계 핵심기술과제(응용연구)인 '제어모멘텀 휠 장치 기술' 과제의 일환으로 수행되었습니다. 지원에 감사드립니다.

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