Huang, HuanBaddour, NatalieLiang, Miang2018-11-052018-11-05May-18978-1-77355-023-7http://hdl.handle.net/10315/35217http://dx.doi.org/10.25071/10315/35217Oscillatory Behavior-based Signal Decomposition (OBSD) is a new technique which decomposes a signal according to oscillatory behavior, instead of frequency bands. It has been used for bearing fault signature extraction under constant speed conditions, where the bearing fault-induced vibration signal can be regarded as a low oscillatory component and the interference can be regarded as a high oscillatory component. However, its effectiveness for bearing fault signature extraction under time-varying speed conditions has not been evaluated. Theoretically, the OBSD is a frequency-independent method and should thus be effective under time-varying speed conditions. In this paper, the performance of the OBSD for bearing fault signature extraction under time-varying speed conditions is examined. The results show that the OBSD can be effectively utilized to extract the bearing fault signature under time-varying speed conditions.Mechatronics, Robots and ControlenBearing fault feature extractionTime-varying speedOscillatory behavior-based signal decompositionMechatronicsRobots and ControlArticle