Table 1: The characteristics of different fault feature extraction method.

MethodCharacteristic

WTThe choice problem for basis functions exists and the different vibration will show the characteristics of different waveforms.

EMDIt lacks rigorous theoretical basis and there is a serious phenomenon of modal aliasing in the decomposition process.

VMDIt solves the problem of mode mixing in EMD, but there are parameter optimization problems in VMD.

BEMDIt can detect synchronous features contained in the two-dimensional signal and comprehensively extract the information of fault signal.