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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Design of the Active Optical Compensation Movements for Image Stabilization of Small Satellite

소형 위성 영상안정화를 위한 능동형 광학 보정장치 설계

  • Hwang, Jai Hyuk (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Yang, Ji Youn (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Park, Jean Ho (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Jo, Jeong Bin (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Kang, Myoung Soo (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Bae, Jae Sung (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2015.02.23
  • Accepted : 2015.04.03
  • Published : 2015.05.01
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Abstract

This paper describes the design of the active optical compensation movements(at focal plane, secondary mirror) for the image stabilization of a small satellite camera. The movements can correct optical misalignment on-line and directly compensate vibration disturbances in the focal plane. Since the devices are installed inside the space camera, it has an remarkable advantage to deal with the structural deformation of a space camera effectively. In this paper, the requirements of the active optical compensation movements for 1m GSD small satellite camera have been analyzed. Based on the established requirements, the design of the active compensation movements have been conducted. The designed active optical compensation system can control 5 axes movements independently to compensate micro-vibration disturbances in the focal plane and to refocus the optical misaligned satellite camera.

본 논문에서는 소형 위성 카메라의 영상안정화를 위해 진동외란 보상 및 궤도상 광학정렬이 가능한 능동형 광학 보정장치의 설계에 대해 연구하였다. 능동형 광학 보정장치는 초점면부 보정장치와 부경 보정장치로 이루어져 있다. 초점면부 보정장치는 영상센서에 유입되는 진동 외란을 초점면부에서 직접 보상하는 장치이다. 또한 부경 보정장치는 초점면부 보정장치와 협력하여 궤도상에서 능동적으로 광학정렬을 수행할 수 있는 장치이다. 본 논문에서는 해상도 1 m급 소형 위성에 적용 가능한 능동형 광학 보정장치 설계를 위해 소형 고해상도 위성 카메라의 요구도를 분석하고, 진동 외란 보상과 궤도상 광학정렬이 능동적으로 가능하도록 초점면부 보정장치와 부경 보정장치의 요구도를 선정하였다. 선정된 요구도를 기준으로 본 연구에서 설계된 능동형 광학 보정장치는 초점면부에서 진동외란 보상 및 초점조절, 부경에서 틸트 및 디스페이싱 보상이 가능하므로 독립적으로 5축 제어가 가능한 시스템이다.

Keywords

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