Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Verification of the Micro-Vibration Isolation Equipment by Qualification Tests

인증시험을 통한 위성용 미소 진동 저감 장치 성능 검증

  • Received : 2024.07.04
  • Accepted : 2024.10.09
  • Published : 2024.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

A spaceborne cryogenic cooler is known to undesirable microvibration disturbances during its on-orbit operation, which is one of the main sources that degrades the image quality of an observation satellite with a high resolution. Several types of vibration isolation systems based on passive approaches have been developed for reducing such microvibration of a linear cooler. A dual coil-spring-type passive isolator was developed. To verify its performance and structural characteristics, transmissibility measurement and modal survey were performed with properly designed dummy instead of a cooler. Results were then used as pass/fail criteria before/after each test. To verify structural and thermal stability of the dual coil-spring-type passive isolator for launch and on-orbit environment, vibration (random and sinusoidal) test, shock test, and thermal cycle test were performed successfully.

적외선 카메라를 탑재한 위성체 내부 진동원 중 검출기 냉각기는 고성능 광학 탑재체의 영상 품질을 저하하는 주요 원인이다. 따라서 광학 성능 확보를 위하여 냉각기 진동 저감이 요구된다. 본 논문에서는 2중 코일 스프링을 적용한 미소 진동 저감 장치에 대하여 기술하였다. 장치의 감쇠 성능과 구조 특성은 냉각기 구동 주파수에서의 전달률과 고유진동수 측정을 수행하여 검증되었다. 또한 발사 및 궤도 환경시험을 수행하여 장치의 구조와 열적 안전성을 검증하였다. 이와 같은 일련의 과정을 통하여 미소진동 저감 장치의 설계 유효성을 입증하였다.

Keywords

References

  1. R. G. Ross, "Cryocooler reliability and redundancy considerations for long-life space missions," in Cryocoolers 11, R. G. Ross, Ed., pp.637-648, Springer, Bonstonm MA, USA, 2002.
  2. A. Veprik, A. Twitto, "Attenuation of cryocooler induced vibration in spaceborne infrared payloads," AIP Conference Proceedings, 1573, 1784, 2015.
  3. A.Veprik, V. Babitsky, S. Riabzev, "Vibration control of linear split stirling cryogenic cooler for airborne infrared application," Shock and Vibration, vol.7, no. 6, pp.363-379, 2000.
  4. V. Babitsky, A.Veprik, "Universal bumpered vibration isolator for severe environment," Journal of Sound and Vibration, 218(2), pp. 269-292, 1998.
  5. D. Robinson and S. Tonn, "Mechanical aspects of the thermal infrared system (TIRS) on Landsat 8," in 2015 IEEE Aerospace Conference, pp. 1-10, Big Sky, MT, USA, 2015.
  6. Y. H. Park, M. S. Jo, E. S. Lee and H. U. Oh, "Performance enhancement of spaceborne cooler passive launch and on-orbit vibration isolation system," International Journal of Aerospace Engineering, Volume 2020, Article ID 6017957, 2020.
  7. S. Schneider, T.T. Mallareddy, D.J. Alarcon, Dipl.R. Kamenzky and P. Blaschke, "Experimental modal analysis of structures with conventional vs. contact-free suspension," Special Topics in Structural Dynamics, Volume 5. pp. 149- 156, 2018.
  8. European Cooperation For Space Standardization, "Space Engineering - Testing," ESA Requirements and Standards Division, ECSS-E-ST-10-03C, 2012.
  9. Goddard Space Flight Center Standard, "General environmental verification standard," NASA Goddard Space Flight Center, GSFC-STD-7000A, 2019.