Method and apparatus for vibration-based automatic condition...

Details Method and apparatus for vibration-based automatic condition... Method and apparatus for vibration-based automatic condition...

2008-12-02

2011-11-29

Chu, Chris (Department: 2815)

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

Self-shifting or selectively adjustable mass

C416S035000, C416S144000, C415S015000, C290S044000

Reexamination Certificate

active

08066486

ABSTRACT:
Method and apparatus for vibration-based automatic condition monitoring of a wind turbine, comprising the steps of: determining a set of vibration measurement values of the wind turbine; calculating a frequency spectrum of the set of vibration measurement values; calculating a cepstrum of the frequency spectrum; selecting at least one quefrency in the cepstrum, and detecting an alarm condition based upon an amplitude of the cepstrum at the selected quefrency, and a wind turbine therefor.

REFERENCES:
patent: 5219454 (1993-06-01), Class
patent: 6320272 (2001-11-01), Lading et al.
patent: 6525518 (2003-02-01), Garnaes
patent: 6966754 (2005-11-01), Wobben
patent: 7330396 (2008-02-01), Wu
patent: 7819624 (2010-10-01), Bonnet
patent: 2005/0096873 (2005-05-01), Klein

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