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Performance monitoring and prognostics for aircraft pneumatic control valves

  • US 8,955,365 B2
  • Filed: 12/11/2009
  • Issued: 02/17/2015
  • Est. Priority Date: 12/23/2008
  • Status: Active Grant
First Claim
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1. A method of assessing the health of first and second pneumatic valves used onboard aircraft, comprising:

  • monitoring a first process controlled by a first pneumatic valve;

    monitoring a second process controlled by a second pneumatic valve;

    using an electronic controller, comparing the monitored first process controlled by the first pneumatic valve with the monitored second process controlled by the second pneumatic valve to derive residues with reduced common mode components; and

    using the at least one electronic controller, ascertaining at least one parameter associated with the health of at least one of the first pneumatic valve and the second pneumatic valve in response at least in part to said derived residue, including evaluating the residues derived from the first and second processes by comparing reference values against the residues with reduced common mode components.

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