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Failure threshold determination of rolling element bearings using vibration fluctuation and failure modes

Behzad, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.3390/app11010160
  3. Publisher: MDPI AG , 2021
  4. Abstract:
  5. One of the challenges in predicting the remaining useful life (RUL) of rolling element bearings (REBs) is determining a proper failure threshold (FT). In the literature, the FT is usually assumed to be a constant value of an extracted feature from the vibration signals. In this study, a degradation indicator was extracted to describe damage to REBs by applying principal component analysis (PCA) to their run-to-failure data. The relationship between this degradation indicator and the vibration peak was represented through a joint probability distribution using statistical copula models. The FT was proposed as a probability distribution based on the fluctuation increase in the vibration trend. A set of run-to-failure tests was conducted. Applying the proposed method to this dataset led to various FTs for the different failure modes that occurred. It is shown that, for inner race degradation, a higher FT can be assumed than for rolling element degradation. This could help extend the lives of REBs regarding the degrading elements. A dataset for an industrial machine was also analyzed and it is shown that the proposed model estimated a reasonable and proper FT in an actual case study. © 2020 by the authors. Licensee MDPI, Basel, Switzerland
  6. Keywords:
  7. Copula models ; Failure mode ; Failure threshold ; Principal component analysis ; Remaining useful life ; Rolling element bearing ; Vibration fluctuation
  8. Source: Applied Sciences (Switzerland) ; Volume 11, Issue 1 , 2021 , Pages 1-18 ; 20763417 (ISSN)
  9. URL: https://www.mdpi.com/2076-3417/11/1/160