Journal
SENSORS
Volume 21, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s21010182
Keywords
data-driven method; Bayesian model; Metropolis-Hastings algorithm; remaining useful life prediction
Funding
- National Natural Science Foundation of China [51975110]
- Liaoning Revitalization Talents Program [XLYC1907171]
- Fundamental Research Funds for the Central Universities [N2003005]
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This paper introduces a data-driven method for predicting the remaining useful life (RUL) of bearings based on Bayesian theory. Time-domain features are extracted from bearing vibration signals and a Bayesian model is established to predict RUL with high accuracy.
Bearings are some of the most critical industrial parts and are widely used in various types of mechanical equipment. Bearing health status can have a significant impact on the overall equipment performance, and bearing failures often cause serious economic losses and even casualties. Thus, estimating the remaining useful life (RUL) of bearings in real time is of utmost importance. This paper proposes a data-driven RUL prediction method for bearings based on Bayesian theory. First, time-domain features are extracted from the bearing vibration signal and data are fused to build a health indicator (HI) and a state model of bearing degradation. Then, according to Bayesian theory, a Bayesian model of state parameters and bearing life is established. The parameters of the Bayesian model are updated and bearing RUL is predicted by the Metropolis-Hastings algorithm. The method was validated by the XJTU-SY bearing open datasets and the prediction results are compared with the existing methods. Accuracy of the proposed method was demonstrated.
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