Bearing Fault Detection on Wind Turbine Gearbox Vibrations Using Generalized Likelihood Ratio-Based Indicators: Preprint

Kayacan Kestel, Cedric Peeters, Jerome Antoni, Shawn Sheng, Jan Helsen

Research output: Contribution to conferencePaper


Studies in condition monitoring literature often aim to detect rolling element bearing faults because they have one of the biggest shares among defects in turbo machinery. Accordingly, several prognosis and diagnosis methods have been devised to identify fault signatures from vibration signals. The underlying idea behind traditional indicators often revolves around tracking both cyclostationarity and abnormal impulses in the vibration signals without distinguishing the two. A recently proposed method to capture the rolling element bearing degradation lays out the groundwork for new indicator families utilizing generalized likelihood ratio test. This novel approach exploits the cyclostationarity and the impulsiveness of vibration signals independently in order to estimate the most suitable indicators for a given fault. However, the method has yet to be tested on complex experimental vibration signals such as those of a wind turbine gearbox. In this study, the approach is applied to the NREL Wind Turbine Gearbox Condition Monitoring Round Robin Study data set for bearing fault detection purposes. The data set is measured on an experimental test rig of a wind turbine gearbox, hence the complexity of the vibration signals is similar to a real case. Furthermore, the new indicators are also tested with signals that carry multiple fault signatures. The outcome demonstrates that the proposed method is capable of distinguishing between healthy and damaged vibration signals measured on a complex wind turbine gearbox.
Original languageAmerican English
Number of pages12
StatePublished - 2022
EventASME Turbo Expo 2022 - Rotterdam, The Netherlands
Duration: 13 Jun 202217 Jun 2022


ConferenceASME Turbo Expo 2022
CityRotterdam, The Netherlands

Bibliographical note

See NREL/CP-5000-85016 for paper as published in proceedings

NREL Publication Number

  • NREL/CP-5000-81777


  • condition monitoring
  • cyclostationary
  • fault detection
  • impulsiveness
  • likelihood ratio test


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