The vibration signal of rolling element bearing can be modulated in the event of fault. Teager energy operator has the obvious advantage of computing speed and demodulation accuracy compared with the Hilbert transform, but it is unable to show frequency resolution enough for visual inspection. Therefore, the method of multiple modulation zoom spectrum analysis (ZFFT) was proposed. A bearing simulator was used to collecte vibration signals of bearing inner race in normal, mild fault and severe fault conditions, extracted the envelope signals using the Teager energy operator and analyzed this envelope signals using ZFFT in order to gain the frequency of shaft speed and harmonics, BPFI (ball pass frequency, inner race) and harmonics, sidebands spaced. The results show that: with the increase of bearing inner race fault, the amplitudes of BPFI and sidebands spaced increase significantly and can be used as the fault characteristic parameters of bearing inner race point faults.
XIA Jun-zhong，ZHAO Lei，BAI Yun-chuan，YU Ming-qi，WANG Zhi-an.
Fault feature extraction of rolling element bearing based on Teager energy operator and ZFFT[J]. Journal of Vibration and Shock, 2017, 36(11): 106-110
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参考文献
[1] 郭宝良，段志善，郑建校，等．振动机械滚动轴承单点点蚀故障诊断研究，振动工程学报，2012，25（5）：610-618．
GUO Bao-liang，DUAN Zhi-shan，ZHENG Jian-xiao，et al．Fault diagnosis of single-point pitting corrosion for rolling bearing of vibrating machine[J]. Journal of Vibration Engineering，2012，25(5)：610-618．
[2] 王天金，冯志鹏，郝如江，等．基于Teager能量算子的滚动轴承故障诊断研究[J]．振动与冲击，2012，31（2）：1-5．
WANG Tian-jin，FENG Zhi-peng，HAO Ru-jiang，et al. Fault diagnosis of rolling element bearings based on Teager energy operator[J]. Journal of Vibration and Shock，2012，31（2）：1-5．
[3] Cheng J S，Yu D J，Yang Y．The application of energy operator demodulation approach based on EMD in machinery fault diagnosis[J]．Mechanical Systems and Signal Processing，2007，21(2)：668-677.
[4] Liang M, Bozchalooi I S．An energy operator approach to joint application of amplitude and frequency-demodulations for bearing fault detection[J]．Mechanical Systems and Signal Processing，2010，24(5)：1473–1494．
[5] Liu H M，Wang X，Lu C．Rolling bearing fault diagnosis based on LCD–TEO and multifractal detrended fluctuation analysis[J]．Mechanical Systems and Signal Processing，2015，60-61：273-288．
[6] 丁 康，潘成灏，李巍华．ZFFT与Chirp-Z变换细化选带的频谱分析对比[J]．振动与冲击，2006，25（6）：9-12．
DING Kang，PAN Cheng-hao，LI Wei-hua．Spectrum analysis comparison between ZFFT and Chirp-Z transform[J]．Journal of Vibration and Shock，2006，25（6）：9-12．
[7] Ma S H，MA Q S，Liu X B. Applications of chirp z transform and multiple modulation zoom spectrum to pulse phase thermography inspection [J]．NDT & E International，2013，54：1-8．
[8] 刘建敏，刘远宏，冯辅周，等．基于复调制细化包络谱和SVM的变速器齿轮故障诊断研究[J]．汽车工程，2014，36（5）：608-612．
LIU Jian-min，LIU Yuan-hong，FENG Fu-zhou，et al．A research on the fault diagnosis of transmission gears based on complex modulation zoom envelope spectrum and SVM[J]．Automotive Engineering，2014，36（5）：608-612．
[9] 夏均忠，刘远宏，李树珉，等．应用Hilbert变换和ZFFT提取变速器齿轮故障特征[J]．振动与冲击，2013，32（6）：63-66．
XIA Jun-zhong，LIU Yuan-hong，LI Shu-min，et al. Gearbox fault detection using Hilbert transform and ZFFT[J]. Journal of Vibration and Shock，2013，32(6)：63-66．
[10] Smith W A， Randall R B. Rolling element bearing diagnostics using the Case Western Reserve University data: A benchmark study[J]．Mechanical Systems and Signal Processing，2015，64-65：100-131．
[11] 冯志鹏，秦嗣峰．基于Hilbert振动分解和高阶能量算子的行星齿轮箱故障诊断研究[J]．振动与冲击，2016，35(5)：47-54．
FENG Zhi-peng，QIN Si-feng．Planetary gearbox fault diagnosis based on Hilbert vibration decomposition and higher order differential energy operator[J]．Journal of Vibration and Shock，2016，35(5)：47-54．
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