Application of MODWPT Square Envelope Kurtosis Spectrum in Fault Diagnosis of the Rolling Bearing Acoustic Signal
In order to diagnose the Rolling Bearing under complex track-side noise environment,the original non-stationary signal can be decomposed into the sum of several sub-band components by maximum overlap discrete wavelet packet transform(MODWPT),and then square envelope Kurtosis spectrum is applied to each sub-band component,the frequency range of the fault impulse signal in the non-stationary signal is located quickly.Finally,the target frequency band is subjected to band-pass filtering and envelope demodulation to obtain the fault diagnosis result.Through the real data verification,the method can accurately locate the resonance frequency band of signal of the Rolling Bearing,and give the accurate fault information.
万方数据
维普
