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DIAGNOSING INTERMITTENT FAULTS

  • US 20080294578A1
  • Filed: 11/15/2007
  • Published: 11/27/2008
  • Est. Priority Date: 05/24/2007
  • Status: Active Grant
First Claim
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1. A method for diagnosing any combination of persistent and intermittent faults or intermittent faults in a system, comprising:

  • obtaining a behavior of a system by measuring or probing the system at particular points;

    investigating a predicted behavior of a modeled system of the system by drawing inferences based on at least conditional probabilities, prior observations and component models of the modeled system;

    comparing the predictions to their corresponding points in the system;

    determining if conflicts or deviations exist between the measured behavior and the predicted behavior;

    adjusting the conditional probabilities to more and more accurately reflect action faults in the system, so they will accept a possibility that a subsequent measurement and/or probing will produce a different value or output; and

    using the conflicts or deviations between the predicted behavior and the actual behavior to obtain a final result based on a new value or output.

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