However, due to the limitations of the clustering algorithm itself, the reconstruction information could not be completely reflected. Therefore, the feature resolution and accuracy of the clustering algorithm are poor when detecting the charac-teristics of vibrationsignals.Through empirical mode decomposition(EMD)algorithm,Lietal.[1]decomposed vibration signals and diagnosed mechanical faults of OLTC through its frequency domain characteristics.However,due to the significant Mode Mixing effect of EMD algorithm when processing instantaneous nonlinear signals,the decomposition results are not very accurate