Estimation of the Defect Width on the Outer Race of a Rolling Element Bearing under Time-Varying Speed Conditions

摘要: Fault diagnosis and failure prognostics for rolling element bearing are helpful preventing equipment predicting the remaining useful life (RUL) to avoid catastrophic failure. Spall size is an important fault feature RUL prediction, most research work has focused on estimating under constant speed conditions. However, estimation of defect width time-varying conditions still a challenge. In this paper, method proposed solve problem. To enhance entry exit events, edited cepstrum used remove determined components. The preprocessed signal resampled from time domain angular eliminate effect variation measure outer race. Next, transient impulse components extracted by local mean decomposition. points when roller passes over race were identified further processing with time-frequency analysis based continuous wavelet transform. can be calculated angle duration, which measured points. was validated experimentally.