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• W2466079300 abstract "The detecting technique of the mechanical anomaly has been a hot topic in the scientific and engineering community. Vibration analysis has been frequently applied in the condition monitoring and fault diagnosis of rolling element bearings. Unfortunately, the vibration signals collected from a faulty bearing are generally nonstationary, nonlinear and with strong noise interference, so it is essential to obtain the fault features correctly. In this paper, a novel numerical analysis method that combines the singular value decomposition (SVD) and local mean decomposition (LMD) is proposed. SVD is a non-parametric technique which has been widely used to eliminate the noise and enhance the impulsive features, then LMD decompose the purified signal into a series of product functions (PFs), each of which is the product of an envelope signal and a purely frequency modulated FM signal. The envelope of a PF is the instantaneous amplitude (IA) and the derivative of the unwrapped phase of a purely flat frequency demodulated (FM) signal is the IF. After that the fault characteristic frequency of the roller bearing can be extracted by performing spectrum analysis to the instantaneous amplitude of PF component containing dominant fault information. Finally, the proposed method is applied to experimental data and the results show the effectiveness of the proposed technique in fault detection and diagnosis of rolling element bearing.DOI: http://dx.doi.org/10.5755/j01.mech.22.3.11962" @default.
• W2466079300 created "2016-07-22" @default.
• W2466079300 creator A5047486671 @default.
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• W2466079300 date "2016-06-21" @default.
• W2466079300 modified "2023-09-26" @default.
• W2466079300 title "Numerical and experimental analysis of vibratory signals for rolling bearing fault diagnosis" @default.
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• W2466079300 doi "https://doi.org/10.5755/j01.mech.22.3.11962" @default.
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