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Citation: Wei Chuanfeng, Li Yunze, Wang Jun, et al. Design on inference engine of the spacecraft thermal fault diagnosis expert system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(01): 60-62. (in Chinese)

Design on inference engine of the spacecraft thermal fault diagnosis expert system

  • Received Date: 18 Aug 2003
  • Publish Date: 31 Jan 2005
  • When a spacecraft is on mission, various unpredictable faults often occur. It is very important that spacecrafts should be capable of diagnosing thermal faults automatically because most of them are difficult to be repaired on orbit, which requires a credible inference engine. And many rules and cases for fault diagnosis can be obtained after the spacecraft thermal test fault analysis. Those cases are difficult to describe in exact rules, but they are the most important experience in the spacecraft test. Combined with the rule-based reasoning and the case-based reasoning, the hybrid inference engine was produced, and the corresponding conflict resolutions were given. In rule-based reasoning, similarity judgement is used to resolve the conflict, and the numerical method differs from the non- numerical one. In case-based reasoning, the method of priority, ranking and credibility can be used; and the method of ranking is preferred to resolve the conflict if the number of all the cases is little.

     

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