ZHENG Jin-de, PAN Hai-yang, QI Xiao-li, et al. Enhanced Empirical Wavelet Transform Based Time-Frequency Analysis and Its Application to Rolling Bearing Fault Diagnosis[J]. Acta Electronica Sinica, 2018, 46(2): 358-364.
ZHENG Jin-de, PAN Hai-yang, QI Xiao-li, et al. Enhanced Empirical Wavelet Transform Based Time-Frequency Analysis and Its Application to Rolling Bearing Fault Diagnosis[J]. Acta Electronica Sinica, 2018, 46(2): 358-364. DOI: 10.3969/j.issn.0372-2112.2018.02.014.
Empirical wavelet transform is a recently proposed method for non-stationary signal analysis. In view of its shortcomings
an enhanced empirical wavelet transform (EEWT) is proposed in this paper. Meanwhile
combining the new definition of instantaneous frequency
a new time-frequency analysis method for non-stationary signal is put forward. Firstly
EEWT is used to decompose a non-stationary signal into a number of intrinsic mode functions (IMFs) that have compact support set spectrum. Secondly
the time-frequency distribution of original signal can be obtained by demodulating each IMF Also
the proposed method is applied to analyze experiment data of rolling bearing by comparing with Hilbert-Huang transform (HHT) and the results show that the proposed method can effectively diagnose the faults of rolling bearings and get a better effect than that of HHT.