Patent ID: 6507789
Filing Date: 2003-01-14
Classification: G01M,G05B

Abstract:
A gear transmission condition monitoring method comprising the steps of:identifying gear mesh frequencies that are remote from interfering frequencies; forming a good operating condition baseline matrix by, for each of the identified gear mesh frequencies, obtaining a good operating condition signal indicative of gear transmission conditions over a segment of time and transforming the obtained good operating condition signal into a good operating condition time-frequency spectrum; forming a faulty operating condition baseline matrix by operating the gear transmission under a plurality of different faulty operating conditions while, for each of the identified gear mesh frequencies, obtaining a faulty operating condition signal over a segment of time and transforming the obtained faulty operating condition signal into a faulty operating condition time-frequency spectrum; and then, obtaining a test gear mesh frequency and a test signal over a segment of time, transforming the obtained test signal into a test time-frequency spectrum, and using the test gear mesh frequency, the good operating condition baseline matrix, and the faulty operating condition baseline matrix to examine the test time-frequency spectrum to monitor gear transmission conditions.