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9999311
Vehicle Gearbox Fault Diagnosis Based On Cepstrum Analysis
Abstract:
Research on damage of gears and gear pairs using vibration signals remains very attractive, because vibration signals from a gear pair are complex in nature and not easy to interpret. Predicting gear pair defects by analyzing changes in vibration signal of gears pairs in operation is a very reliable method. Therefore, a suitable vibration signal processing technique is necessary to extract defect information generally obscured by the noise from dynamic factors of other gear pairs.This article presents the value of cepstrum analysis in vehicle gearbox fault diagnosis. Cepstrum represents the overall power content of a whole family of harmonics and sidebands when more than one family of sidebands is present at the same time. The concept for the measurement and analysis involved in using the technique are briefly outlined. Cepstrum analysis is used for detection of an artificial pitting defect in a vehicle gearbox loaded with different speeds and torques. The test stand is equipped with three dynamometers; the input dynamometer serves asthe internal combustion engine, the output dynamometers introduce the load on the flanges of the output joint shafts. The pitting defect is manufactured on the tooth side of a gear of the fifth speed on the secondary shaft. Also, a method for fault diagnosis of gear faults is presented based on order Cepstrum. The procedure is illustrated with the experimental vibration data of the vehicle gearbox. The results show the effectiveness of Cepstrum analysis in detection and diagnosis of the gear condition.
Digital Object Identifier (DOI):

References:

[1] Norton, M.P., "Fundamentals of vibration and noise analysis for engineers" Chap.8, 2005.
[2] Hans Konstantin-Hansen and HenrikHerlufsen, "Envelope and Cepstrum Analyses for Machinery Fault Identification", SOUND & VIBRATION, Brüel and Kjaer, N وrum, Denmark, pp. 10-12 MAY 2010.
[3] Xinyan Zhang et al. "Summarization and Study of Fault Diagnosis Technology of the Main Components of Wind Turbine Generator System", ICSET, IEEE, pp. 1223-1226, 2008.
[4] Childers, D.G., Skinner, D.P. &Kemerait, R.C., "The Cepstrum: A Guide to Processing". IEEE Proc. Vol. 65, No. 10, pp. 1428-1443, October 1977.
[5] R. B. Randall and J. Hee1981 Brüel el &Kjaer technical Review No. 3, 3}40. Cepstrum analysis.
[6] B.D. Forrester, "Advanced Vibration Analysis Techniques for Fault Detection and Diagnosis in Geared Transmission Systems", Ph.D. Thesis, Swinburne University of Technology, Australia, 1996.
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