Compound Fault Feature Separation of Rolling Bearing Based on Complex Wavelet and Energy Operator Demodulation

摘要：

　　Compound fault feature separation is a difficult problem in diagnosis field of mechanical system.For the rolling bearing with compound fault on outer and inner race, feature separation technology based on complex wavelet transform and energy operator demodulation is introduced.Through continuous wavelet transform, coefficients of mixed fault signal can be achieved in different wavelet transform domain (i.e.real, imaginary, modulus and phase domain).Furthermore, wavelet power spectrum contours and time average wavelet energy spectrum are applied to extract the scales which hold rich fault information, and the wavelet coefficient slice of specific scale is also drawn.For wavelet coefficients in different domain, spectrum analysis and energy operator demodulation can be used successfully to separate mixed fault.The comparison of feature extraction effect between complex wavelet and real wavelet transform shows that complex wavelet transform is obviously better than the latter.

关键词： Complex wavelet Compound fault Energy operator demodulation Continuous wavelet transform

作者: Yang Yang Jian Yu Zhang Sui Zheng Zhang

作者单位: Key Laboratory of Advanced Manufacturing Technology,Beijing University of Technology,Beijing

会议类型: 国际会议

会议名称: the 2012 International Conference on Vibration, Structural Engineering and Measurement (2012年振动、结构工程与测量国际会议(ICVSEM2012))

会议地点: 上海

会议语种:英文

页码: 765-770

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）