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

Investigation of Micro-vibration Isolation Performance of SMA Mesh Washer Isolator for Vibration Isolation of X-band Antenna

SMA 메쉬 와셔 진동 절연기를 적용한 X-band 안테나의 미소진동 절연성능 검토

  • Jeon, Su-Hyeon (Space Technology Synthesis Lab, Dept. of Aerospace Engineering, Chosun University) ;
  • Kwon, Sung-Choel (Space Technology Synthesis Lab, Dept. of Aerospace Engineering, Chosun University) ;
  • Kim, Dae-Kwan (Satellite Control System Team, Korea Aerospace Research Institute) ;
  • Oh, Hyun-Ung (Space Technology Synthesis Lab, Dept. of Aerospace Engineering, Chosun University)
  • Received : 2014.07.07
  • Accepted : 2014.09.22
  • Published : 2014.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

Two axis gimbal type X-band antenna system has been widely used to effectively transmit the real time image data from the observation satellite to the ground station. The micro-vibration generated by stepping motor actuation and imperfect intermeshed gear configuration of the antenna is one of the sources to degrade the image quality. To guarantee a high quality image of high resolution observation satellite, micro-vibration isolation of X-band antenna is required. In this paper, the X-band antenna vibration isolation system using pseudoelastic SMA(Shape Memory Alloy) mesh washer has been newly suggested. The basic characteristics of the SMA mesh washer isolator proposed in this study has been measured through static load tests and its effectiveness has been demonstrated by the micro-vibration isolation test of the X-band antenna.

관측위성으로부터 획득된 영상데이터를 지상국에 효율적으로 전송하기 위해 2축 짐벌 형태의 지향성 X-band 안테나가 적용되고 있으며, 안테나의 고속 정밀지향성 확보를 위해 구비된 모터 및 기어 간의 부정확한 맞물림으로부터 발생되는 미소진동은 영상품질 저하의 원인으로 작용한다. 고해상도 관측위성의 지향성능 향상을 통한 고해상도 영상정보 획득을 위해서는 안테나 구동시 발생하는 미소진동이 주요 임무장비에 전달되지 않도록 미소진동 절연이 요구된다. 본 논문에서는 X-band 안테나의 미소진동절연을 목적으로 의탄성 SMA 메쉬와셔 진동 절연기를 제안하였으며, 정하중 시험을 통해 진동 절연기의 기본 특성을 확인하였다. 또한, X-band 안테나의 미소진동 시험을 통해 진동절연기 유무에 따른 진동절연성능을 비교 및 분석 하였다.

Keywords

References

  1. J. S. Park and K. H. Yang, "Trends of the Vibration Isolation System for Spacecrafts", Current Industrial and Technological Trends in Aerospace, Vol. 8, No. 2, 2010, pp. 54-64.
  2. D. K. Kim, S. H. Oh, H. B. Kim, W. B. Lee and K. L. Yong, "Micro-vibration Test of X-band Antenna with Two-axis Gimbal System", Proceedings of the KSAS Annual Autumn Conference, 2010, No. 11, pp. 927-930.
  3. S. G. Lee, J. T. Lee, E. S. Kang and S. S. Yong, "Technical Trends of X-band Antenna Space Program", Current Industrial and Technological Trends in Aerospace", roceedings of the KSAS Annual Autumn Conference, 2013, Vol. 11, No. 2, pp. 81-89.
  4. H. Kozilek. B. Specht, S. S. Yong and S. G. Lee, "Micro Vibration Improvement of a Stepper Actuated Mechanism", European Space Agency, No. 718, 2013.
  5. S. H. Youn, Y. S. Jang and J. H. Han, "Compressed Mesh Washer Isolators using the Pseudoelasticity of SMA for Pyroshock Attenuation", Journal of Intelligent Material System and Structures, Vol. 21. No. 4, 2010, pp. 407-421. https://doi.org/10.1177/1045389X09355665
  6. H. K. Jeong, J. H. Han, S. H. Youn and J. H. Lee, "Frequency Tunable Vibration and Shock Isolator using Shape Memory Alloy Wire Actuator", Journal of Intelligent Material Systems and Structures, Vol. 25, No. 7, 2014, pp. 908-919. https://doi.org/10.1177/1045389X13491638