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Systems and methods for health monitoring of complex systems

  • US 8,437,904 B2
  • Filed: 09/28/2007
  • Issued: 05/07/2013
  • Est. Priority Date: 06/12/2007
  • Status: Active Grant
First Claim
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1. A method to evaluate a condition of an aircraft engine precooler, comprising:

  • receiving, in a processor-based health management system, a plurality of raw signals indicative of observation states of a plurality of operating variables associated with the aircraft engine precooler;

    smoothing the plurality of raw signals collected during a flight to obtain a per-flight diagnosis;

    performing, in the processor-based health management system, a joint probability analysis of the plurality of signals using a diagnostic model to generate a predictive failure prediction for the aircraft engine precooler; and

    reporting the predictive failure prediction to an aircraft health management system, wherein performing, in the processor-based health management system, a joint probability analysis of the plurality of signals using a diagnostic model to generate a predictive failure prediction for the aircraft engine precooler comprises;

    identifying a plurality of predictor nodes in a predictive failure model; and

    evaluating a predictive probability of failure based on the plurality of predictor nodes.

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