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Vibratory monitoring of gear transmissions in variable regime

Published online by Cambridge University Press:  28 August 2014

M. Merzoug ,
K. A. Sghir ,
A. Miloudi  and
J. P. Dron
M. Merzoug*
Affiliation:
Laboratoire de Mécanique Avancée, USTHB, BP 32 El Alia, Alger, 16111 Bab Ezzouar, Algerie
K. A. Sghir
Affiliation:
Groupe de Recherche en Science Pour l’Ingénieur, Université de Reims Champagne Ardenne, UFR Sciences Exactes et Naturelles, Moulin de la Housse, BP 1039, 51687 Reims Cedex, France
A. Miloudi
Affiliation:
Laboratoire de Mécanique Avancée, USTHB, BP 32 El Alia, Alger, 16111 Bab Ezzouar, Algerie
J. P. Dron
Affiliation:
Groupe de Recherche en Science Pour l’Ingénieur, Université de Reims Champagne Ardenne, UFR Sciences Exactes et Naturelles, Moulin de la Housse, BP 1039, 51687 Reims Cedex, France
*
a Corresponding author: moustaphamerzoug@yahoo.fr
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Abstract

This paper falls within the context of diagnosis of rotating machines in speed variable regime. Based on simulation signals, this work has the purpose to find relevant indicators for the diagnosis of gear transmissions in a variable regime. Two indicators are proposed; the first indicator is the RMS value applied to the vibration signal divided by its corresponding instantaneous frequency. The second is the normalised gear frequency by averaging speed. The gear frequency and averaging speed are estimated from the spectrogram. To test the proposed indicators simulate signals have been used. These signals are the results of a dynamic modelling of the gears transmission and are calculated by using the Newmark integration diagram. This dynamic modelling takes into account the eccentricity defect.

Keywords

Gearsinstantaneous frequencyRMS valuespectral analysis
Type
Research Article
Information
Mechanics & Industry , Volume 15 , Issue 5 , 2014 , pp. 377 - 382
Copyright
© AFM, EDP Sciences 2014

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