Weak fault feature extraction for bearing based on order cepstrum enhanced by teager energy operator
The bearing’s fault feature is easier to be exposed and difficult to be extracted during speedup of a gearbox. In order to solve this problem, the enhancement of the order cepstrum based on Teager energy operator was presented. First, calculated the Teager energy operator of signal resampled by even angle-interval. Then the outcome of Teager energy operator was studied with the order cepstrum analysis, that was the order cepstrum enhanced by Teager energy operator. The signals of exfoliation fault at outside and inside ring of rolling bearing during speedup were analyzed. The results show that Teager energy operator can effectively enhance impulse components and restrain non-impulse components. Order cepstrum can identify impulse fault feature from the interference accurately and extract the weak fault feature of the bearing.
1. Department of Military Automobile，Military Transportation University，Tianjin 300161, China；
2.The Library of Military Transportation University，Tianjin 300161, China
Abstract：The bearing’s fault feature is easier to be exposed and difficult to be extracted during speedup of a gearbox. In order to solve this problem, the enhancement of the order cepstrum based on Teager energy operator was presented. First, calculated the Teager energy operator of signal resampled by even angle-interval. Then the outcome of Teager energy operator was studied with the order cepstrum analysis, that was the order cepstrum enhanced by Teager energy operator. The signals of exfoliation fault at outside and inside ring of rolling bearing during speedup were analyzed. The results show that Teager energy operator can effectively enhance impulse components and restrain non-impulse components. Order cepstrum can identify impulse fault feature from the interference accurately and extract the weak fault feature of the bearing.
杨青乐1，梅检民1，肖 静2，张玲玲1，肖云魁1. Teager能量算子增强倒阶次谱提取轴承微弱故障特征[J]. 振动与冲击, 2015, 34(6): 1-5.
YANG Qing-le 1，MEI Jian-min 1，XIAO Jing 2，ZHANG Ling-ling1，XIAO Yun-kui1. Weak fault feature extraction for bearing based on order cepstrum enhanced by teager energy operator. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(6): 1-5.
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