Application of an improved kurtogram method for fault diagnosis of rolling element bearings

被引:457
作者
Lei, Yaguo [1 ]
Lin, Jing [1 ]
He, Zhengjia [1 ]
Zi, Yanyang [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
Kurtogram; Wavelet packet transform; Rolling element bearings; Fault diagnosis; SPECTRAL KURTOSIS;
D O I
10.1016/j.ymssp.2010.12.011
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Kurtogram, due to the superiority of detecting and characterizing transients in a signal, has been proved to be a very powerful and practical tool in machinery fault diagnosis. Kurtogram, based on the short time Fourier transform (STFT) or FIR filters, however, limits the accuracy improvement of kurtogram in extracting transient characteristics from a noisy signal and identifying machinery fault. Therefore, more precise filters need to be developed and incorporated into the kurtogram method to overcome its shortcomings and to further enhance its accuracy in discovering characteristics and detecting faults. The filter based on wavelet packet transform (WPT) can filter out noise and precisely match the fault characteristics of noisy signals. By introducing WPT into kurtogram, this paper proposes an improved kurtogram method adopting WPT as the filter of kurtogram to overcome the shortcomings of the original kurtogram. The vibration signals collected from rolling element bearings are used to demonstrate the improved performance of the proposed method compared with the original kurtogram. The results verify the effectiveness of the method in extracting fault characteristics and diagnosing faults of rolling element bearings. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1738 / 1749
页数:12
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