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Apparatus and method for monitoring shaft cracking or incipient pinion slip in a geared system

  • US 6,449,564 B1
  • Filed: 11/23/1998
  • Issued: 09/10/2002
  • Est. Priority Date: 11/23/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for monitoring shaft cracking or incipient pinion slip in an operating system, the apparatus comprising:

  • a controller adapted to determine, at a first time, a first characteristic natural frequency of a first assembly of the operating system and a second characteristic natural frequency of a second coupled assembly of the operating system;

    the controller adapted to determine, at a second time, the first characteristic natural frequency of the first assembly and the second characteristic natural frequency of the second coupled assembly; and

    the controller adapted to compare the first and second characteristic natural frequencies determined at the first time to the first and second characteristic natural frequencies determined at the second time to detect a shift in the first and second characteristic natural frequencies in response to at least one of shaft cracking and incipient pinion slip.

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