Adaptive resonance demodulation method and its application in the fault diagnosis of&nbsp; railway bearings

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (18) : 86-93.

Adaptive resonance demodulation method and its application in the fault diagnosis of railway bearings

LIU Wenpeng1,2，YANG Shaopu2，LI Qiang1，LIU Yongqiang2，GU Xiaohui2

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Abstract

Resonance demodulation is one of the most advantageous methods in rolling bearing diagnosis, but the determination of demodulation frequency band is always a huge challenge.In order to solve the problem that the traditional kurtogram based methods can’t identify the optimal resonant frequency band to perform the envelope analysis under the condition of complex interference, a new adaptive resonant demodulation method based on autocorrelation spectrum kurtogram was proposed.The kurtosis of autocorrelation spectrum of the squared envelope of a filtered signal was used as an index to generate a new kurtogram.The validity and superiority of the method under complex working conditions were verified by the experimental signals of a high-speed railway bearing under three different working conditions of no-load, static load and dynamic load and also by a railway truck bearing experimental signal.The proposed method performs a high engineering application value.

Key words

rolling element bearing / fault diagnosis / resonance demodulation / kurtogram / autocorrelation spectrum

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LIU Wenpeng，YANG Shaopu，LI Qiang，LIU Yongqiang，GU Xiaohui. Adaptive resonance demodulation method and its application in the fault diagnosis of railway bearings[J]. Journal of Vibration and Shock, 2021, 40(18): 86-93

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