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System and method for gearbox health monitoring

  • US 7,945,397 B2
  • Filed: 04/02/2009
  • Issued: 05/17/2011
  • Est. Priority Date: 04/02/2009
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • an input interface configured to receive an input signal associated with at least one stage of a gearbox;

    a processor configured to identify a fault in the gearbox using the input signal; and

    an output interface configured to provide an indicator identifying the fault;

    wherein the processor is configured to identify the fault by;

    determining a family of frequencies related to at least one failure mode of the gearbox, the family of frequencies including a gear mesh frequency and its harmonics comprising a first signal representing a harmonic from a first element in the gearbox and a second signal representing a sideband related to a second element within the gearbox;

    decomposing the input signal using the family of frequencies;

    reconstructing a gear signal using the decomposed input signal; and

    comparing the reconstructed gear signal to a baseline signal.

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