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Thermal Design of Electronic for Controlling X-band Antenna of Compact Advanced Satellite

차세대 중형위성 탑재 X-밴드 안테나 구동용 전자유닛 APD 열설계 및 열해석

  • Kim, Hye-In (Space Technology Synthetic Laboratory, Dept. of Aerospace Engineering, Chosun University) ;
  • You, Chang-Mok (Kukdong Telecommunication) ;
  • Kang, Eun-Su (Korea Aerospace Research Institute) ;
  • Oh, Hyun-Ung (Space Technology Synthetic Laboratory, Dept. of Aerospace Engineering, Chosun University)
  • 김혜인 (조선대학교 항공우주공학과 우주기술융합연구실) ;
  • 유창목 (극동통신) ;
  • 강은수 (한국항공우주연구원) ;
  • 오현웅 (조선대학교 항공우주공학과 우주기술융합연구실)
  • Received : 2017.10.11
  • Accepted : 2018.01.22
  • Published : 2018.02.28

Abstract

The APD (Antenna Pointing Driver) is an electronic equipment tool that is used to drive the two-axis gimbal-type antenna for the image data transmission of CAS (Compact Advanced Satellite). In this study, a heat dissipation of EEE (Electrical, Electronic and Electromechanical) is reviewed, to identify the parts that directly affected its efficiency, lifetime as well as the reliability of the structure. This event eventually incurs a failure of the EEE part itself, or even the entire satellite system as noted in experiments in this case. To guarantee reliability of electronic equipment during the mission, the junction temperature of EEE parts is considered a significant and important design factor, and subsequently must be secured within the allowable range. Therefore, the notation of the thermal analysis considering the derating is indispensable, and a proper thermal mathematical model should be constructed for this case. In this study, the thermal design and thermal analysis are performed to confirm the temperature requirement of the APD. In addition, we noted that the validity of the thermal model, according to each of the identified modeling methods, was therefore compared through the thermal analysis utilized in this case.

APD (Antenna Pointing Driver)는 차세대 중형위성에 탑재되는 위성 데이터 전송용 2축 짐벌식 X-밴드 안테나를 구동하기 위한 전장품이다. 전장품에 탑재된 EEE (Electrical, Electronic and Electromechanical) 소자의 열소산은 소자의 효율과 수명, 신뢰도에 직접적으로 영향을 미치게 되며, 종국에는 소자 자체의 파손으로 위성 전체 시스템의 실패를 초래할 수 있다. 임무기간동안 전장품의 신뢰성을 보장하기 위해 EEE 소자의 접합온도는 중요한 설계요소가 되며, 허용범위 내에서 확보되어야 한다. 따라서 사전에 소자의 감쇄비를 고려한 열해석이 반드시 수행되어야하며, 이를 위해 적절한 열해석모델을 구축하여야한다. 본 논문에서는 APD의 온도 요구조건 만족여부를 확인하기 위해 열설계 및 열해석을 수행하였으며, 이와 더불어 각 모델링 기법에 따른 열해석모델의 유효성을 비교, 분석하였다.

Keywords

References

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