Decomposition of Gear Motion Signals and Its Application to Gearbox Diagnostics

[+] Author and Article Information
W. J. Wang

Department of Mechanical and Manufacturing Engineering, De Montfort University, Leicester LEI 9BH, England

P. D. McFadden

Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, England

J. Vib. Acoust 117(3A), 363-369 (Jul 01, 1995) (7 pages) doi:10.1115/1.2874462 History: Received December 01, 1992; Online February 26, 2008


The decomposition of gear motion and the related dynamic measurements for the condition monitoring and fault diagnosis of gearboxes are described. The motion error signal is separated according to fundamental frequencies into the harmonic error and the residual error, which are used to quantify the gear condition. High-order accelerations, such as jerk, are considered and shown to be more sensitive to some classes of early damage to gear teeth. Analysis of the time domain average of a gearbox casing vibration signal enables early detection of gear damage. Several methods to represent and enhance the fault information in the signal are introduced, based on the representation of different forms of the motion errors.

Copyright © 1995 by The American Society of Mechanical Engineers
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