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Optimal Design of the Flexure Mounts for Satellite Camera by Using Design of Experiments

실험계획법을 이용한 인공위성 주반사경 플렉셔 마운트의 최적 설계

  • 김현중 (한국과학기술원 기계공학과) ;
  • 서유덕 (한국과학기술원 기계공학과) ;
  • 윤성기 (한국과학기술원 기계공학과) ;
  • 이승훈 (한국항공우주연구원 광학탑재체 그룹) ;
  • 이덕규 (한국항공우주연구원 광학탑재체 그룹) ;
  • 이응식 (한국항공우주연구원 광학탑재체 그룹)
  • Published : 2008.08.01

Abstract

The primary mirror system in a satellite camera is an opto-mechanically coupled system for a reason that optical and mechanical behaviors are intricately interactive. In order to enhance the opto-mechanical performance of the primary mirror system, opto-mechanical behaviors should be thoroughly investigated by using various analysis procedures such as elastic, thermo-elastic, optical and eigenvalue analysis. In this paper, optimal design of the bipod flexure mounts for high opto-mechanical performance is performed. Optomechanical performances considered in this paper are RMS wavefront error under the gravity and thermal loading conditions and 1st natural frequency of the mirror system. The procedures of the flexure mounts design based on design of experiments and statistics is as follows. The experiments for opto-mechanical analysis are constructed based on the tables of orthogonal arrays and analysis of each experiment is carried out. In order to deal with the multiple opto-mechanical properties, MADM (Multiple-attribute decision making) is employed. From the analysis results, the critical design variables of the flexure mounts which have dominant influences on opto-mechanical performance are determined through analysis of variance and F-test. The regression model in terms of the critical design variables is constructed based on the response surfaceanalysis. Then the critical design variables are optimized from the regression model by using SQP algorithm. Opto-mechanical performance of the optimal bipod flexure mounts is verified through analysis.

Keywords

Flexure mount;Opto-mechanical analysis;Tables of orthogonal arrays;Response surface method;RMS wavefront error;MADM

References

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