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Method for computing the relative likelihood of failures

  • US 8,224,765 B2
  • Filed: 02/05/2009
  • Issued: 07/17/2012
  • Est. Priority Date: 02/05/2009
  • Status: Active Grant
First Claim
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1. A method for determining relative likelihood of a failure mode, the method comprising:

  • receiving evidence observations of a monitored system from monitors connected in a many-to-many relationship to the failure modes;

    generating a fault condition including states of all failure modes that are connected to the monitors, the fault condition being generated for a reference model of the monitored system based on the received evidence observations; and

    computing a relative probability of failure for each failure mode based on a false alarm probability, a detection probability, and a ratio of prior probabilities of a candidate hypothesis to a null hypothesis of no active failure modes.

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