Study on order analysis for condition monitoring wind turbine gearbox

Yanhui Feng, Yingning Qiu, David Infield, Jiawei Li, Wenxian Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)
38 Downloads (Pure)


A complex 3-stage gearbox design, in which one planetary
gear set at first stage and two sets of parallel gears at second
and third stage, is conventionally applied on the large wind
turbine configuration with Doubly Fed Induction Generator.
In this variable-speed wind turbine, it is hard to directly apply
conventional frequency analysis on condition monitoring of
the gearbox planetary stage. Proper signal processing and
analysis become crucial here for interpreting the conditions of
gears and bearings. In this paper, order analysis is studied for
condition monitoring the planetary stage of wind turbine
gearbox. The approach takes advantage of angular resampling
to achieve cyclo-stationary vibration signals and
lessen the effects due to speed changes. One key element in
the scheme is taking angular information to enable resampling
the time-domain signals into angular-domain signals.
A vibration signal model for gearbox planetary stage is firstly
described, and the scheme is then tested on simulated signals
to achieve fine frequency resolution. Time synchronous
averaging is applied as a pre-processing technique to enhance
the Signal to Noise Ratio (SNR) in order spectrum
Original languageEnglish
Title of host publicationProceedings of IET Renewable Power Generation conference, 2014
Number of pages4
Publication statusPublished - 2014


  • condition monitoring
  • order analysis
  • angular sampling
  • planetary gearbox
  • wind turbine

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