摘要： The traditional envelope analysis is an effective method for the fault detection of rolling bearings. However, all the resonant frequency bands must be examined during the bearing-fault detection process. To ameliorate the above deficiency, this paper presents a new concept based on the empirical mode decomposition (EMD) to choose an appropriate intrinsic mode function (IMF) for the subsequent envelope analysis. By virtue of the band-pass filtering nature of EMD, the resonant frequency bands of structure to be measured are captured in the IMFs. As impulses arising from rolling elements striking bearing faults modulate with structure resonance, appropriate IMFs are potentially able to characterize fault signatures, instead of always using IMF 1. In the study, dual- and triple-fault bearings are used to justify the proposed method and comparisons with the traditional envelope analysis are made. ► Using EMD associated with envelope analysis for multiple fault diagnosis of ball Bearings. ► Selection of the most appropriate IMFs from EMD for dual or triple bearing-fault diagnosis. ► Eliminating the need to investigate all resonant frequency bands when using envelope analysis. ► Detailed analysis and description of detection mechanism on ball bearing faults. 出版者： Elsevier Ltd 出版日期： 2013-04-01 出處： International journal of mechanical sciences, 2013-04, Vol.69, p.114-124 版權： 2013 Elsevier Ltd 識別號： ISSN: 0020-7403 識別號： EISSN: 1879-2162 識別號： DOI: 10.1016/j.ijmecsci.2013.01.035
