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Analysis of the Single Event Effect of the Science Technology Satellite-3 On-Board Computer under Proton Irradiation

과학기술위성 3호 온보드 컴퓨터의 양성자 빔에 의한 Single Event Effect 분석

  • 강동수 (충남대학교 컴퓨터공학과 대학원) ;
  • 오대수 (한국과학기술원 인공위성센터) ;
  • 고대호 (한국항공우주연구원) ;
  • 백종철 (AP 시스템(주)) ;
  • 김형신 (충남대학교 컴퓨터공학과) ;
  • 장경선 (충남대학교 컴퓨터공학과)
  • Received : 2011.07.12
  • Accepted : 2011.11.22
  • Published : 2011.12.01

Abstract

Field Programmable Gate Array(FPGA)s are replacing traditional integrated circuits for space applications due to their lower development cost as well as reconfigurability. However, they are very sensitive to single event upset (SEU) caused by space radiation environment. In order to mitigate the SEU, on-board computer of STSAT-3 employed a triple modular redundancy(TMR) and scrubbing scheme. Experimental results showed that upset threshold energy was improved from 10.6 MeV to 20.3 MeV when the TMR and the scrubbing were applied to the on-board computer. Combining the experimental results with the orbit simulation results, calculated bit-flip rate of on-board computer is 1.23 bit-flips/day assuming in the worst case of STSAT-3 orbit.

Keywords

STSAT-3;On-Board Computer;SEU;TMR;Scrubbing scheme

Acknowledgement

Supported by : National Research Foundation of Korea(NRF)

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