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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Performance Verification of Deploy/Stow-type Calibration Mechanism with Dual-function of Launch Locking and Fail-Safe

단일장치로 발사환경구속 및 결함안전기능이 가능한 전개수납형 교정 메커니즘의 기능검증

  • Lee, Myeong-Jae (Department of Aerospace Engineering, Chosun University) ;
  • Kim, Tae-Gyu (Department of Aerospace Engineering, Chosun University) ;
  • Jo, Mun-Shin (Mechatronics Groups, Hanwha Thales) ;
  • Oh, Hyun-Ung (Department of Aerospace Engineering, Chosun University)
  • Received : 2016.02.22
  • Accepted : 2016.09.28
  • Published : 2016.10.01
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Abstract

Spaceborne imaging sensors require periodic calibrations using an on-board calibration device for an image quality of observation satellites. The on-board calibration device consists of a blackbody to provide uniform radiance temperatures and calibration mechanism with a function of stow and deploy to target the blackbody during the calibration. Among these devices, the calibration mechanism is required to implement a fail-safe function to prevent blocking of the main optical path when the mechanism stops at a certain position during on-orbit calibration. In addition, structural safety of the mechanical driving part of the mechanism within the launch environment must be guaranteed. In this study, we proposed a deploy/stow-type calibration mechanism that provides launch-lock and fail-safe function. The effectiveness of the functionality of the proposed mechanism was validated through functional test using engineering model.

우주용 영상센서의 비균일 출력특성 교정을 통한 영상품질향상을 목적으로 탑재교정장치가 요구된다. 탑재교정장치는 균일한 온도정보 제공을 위한 흑체를 비롯하여, 흑체로의 지향성 확보를 위하여 전개/수납 기능이 포함되는 교정 메커니즘으로 구성된다. 이 중, 교정 메커니즘은 궤도상에서 구동장치의 결함 발생 시 주광경로 확보를 위한 결함안전 기능이 요구된다. 추가적으로, 구동부에 대한 발사환경에서의 구조건전성 확보가 필수적이다. 본 논문에서는 단일장치로 발사환경 구속 및 결함안전 기능 구현이 가능한 전개수납형 교정 메커니즘을 제안하였다. 상기 제안한 메커니즘의 기능모델을 통한 동작 기능시험을 수행하여 설계의 유효성을 입증하였다.

Keywords

References

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