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Longlife Dependable Computers for Spacecrafts

  • Tadashi Takano
  • Takahiro Yamada
  • Hatsuhiko Kato
  • Toshiyuki Tanaka
  • Hirokazu Ihara
  • Nobuyasu Kanekawa
  • Hideo Maejima
Part of the Dependable Computing and Fault-Tolerant Systems book series (DEPENDABLECOMP, volume 4)

Abstract

Computers for spacecraft are being developed utilizing fault-tolerant configurations. To attain high dependability mostly using components available for commercial use, many fault-tolerance concepts are systematically combined. Besides adopting the conventional approaches such as spatial diversity based on the majority voting, the usage of ECC, watch dog timers and current limiter, we introduce some new concepts such as softwarevoting with inter-cell communication, time diversity based on the output feedback and stepwise negotiating voting. Most of the results were implemented on the flight model of On-Board Computer (here in after OBC) to be loaded on MUSES-A (Mu Space Experimental Satellite) which will be launched onto lunar swing-by orbit early in 1990. The design approach to construct a fault-tolerant computer system mostly using components in commercial use will be verified on MUSES-A as one of its mission apparatuses for experiment.

Keywords

Soft Error Onboard Computer Dependable Computer High Integration Density Ground Support Equipment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Wien 1991

Authors and Affiliations

  • Tadashi Takano
    • 1
  • Takahiro Yamada
    • 1
  • Hatsuhiko Kato
    • 2
  • Toshiyuki Tanaka
    • 2
  • Hirokazu Ihara
    • 2
  • Nobuyasu Kanekawa
    • 3
  • Hideo Maejima
    • 3
  1. 1.Institute of Space and Astronautical SciencesSaga mihara-Shi, Kanagawa 229Japan
  2. 2.Space Systems DivisionHITACHI Ltd.Totsukaku, Yo kohama-Shi 244Japan
  3. 3.HITACHI Research LaboratoryHITACHI Ltd.Hitachi-Shi, IbaragiJapan

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