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Diagnostic trend analysis

  • US 5,951,611 A
  • Filed: 11/18/1996
  • Issued: 09/14/1999
  • Est. Priority Date: 11/18/1996
  • Status: Expired due to Term
First Claim
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1. A diagnostic trend analysis method for analyzing engine trend data for aircraft engines, the method comprising the steps of:

  • calculating appropriate trend parameters from raw trend data;

    eliminating wild points associated with the calculated trend parameters;

    detecting abnormal shifts and changes at a most recent point for each trend parameter and differentiating between a real change in engine performance and a faulty measurement or data scatter;

    evaluating the abnormal shifts and changes in each trend parameter; and

    using the evaluation to filter out spurious data and provide accurate maintenance recommendations for real engine trend shifts.

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