Transient modeling and parameter identification based on wavelet and correlation filtering for rotating machine fault diagnosis

• Published in: Mechanical systems and signal processing Vol. 25; no. 4; pp. 1299 - 1320
• Main Authors: Wang, Shibin, Huang, Weiguo, Zhu, Z.K.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-05-2011; Elsevier
• Subjects: Applied sciences; Bearings, bushings, rolling bearings; Correlation filtering; Drives; Exact sciences and technology; Fault detection; Fault diagnosis; Faults; Filtering; Fundamental areas of phenomenology (including applications); Gears; Industrial metrology. Testing; Mathematical models; Measurement and testing methods; Mechanical engineering. Machine design; Parameter identification; Physics; Rotating machine; Rotating machines; Solid mechanics; Structural and continuum mechanics; Transient modeling; Vibration; Wavelet; Fault diagnosis; Rotating machine; Parameter identification; Correlation filtering; Transient modeling; Transient response; Correlation; Filtering; Vibration; Localized mode; Bearing(mechanics); Rolling contact; Modeling; Correlation method; Transients; Wavelet transformation; Time interval; System identification; Fault diagnostic; Gear box; Defect detection
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2010.10.013

At constant rotating speed, localized faults in rotating machine tend to result in periodic shocks and thus arouse periodic transients in the vibration signal. The transient feature analysis has always been a crucial problem for localized fault detection, and the key aim for transient feature analysis is to identify the model and its parameters (frequency, damping ratio and time index) of the transient, and the time interval, i.e. period, between transients. Based on wavelet and correlation filtering, a technique incorporating transient modeling and parameter identification is proposed for rotating machine fault feature detection. With the proposed method, both parameters of a single transient and the period between transients can be identified from the vibration signal, and localized faults can be detected based on the parameters, especially the period. First, a simulation signal is used to test the performance of the proposed method. Then the method is applied to the vibration signals of different types of bearings with localized faults in the outer race, the inner race and the rolling element, respectively, and all the results show that the period between transients, representing the localized fault characteristic, is successfully detected. The method is also utilized in gearbox fault diagnosis and the effectiveness is verified through identifying the parameters of the transient model and the period. Moreover, it can be drawn that for bearing fault detection, the single-side wavelet model is more suitable than double-side one, while the double-side model for gearbox fault detection. This research proposed an effective method of localized fault detection for rotating machine fault diagnosis through transient modeling and parameter detection.