Mechanics & Industry
Volume 15, Number 5, 2014
|Page(s)||377 - 382|
|Published online||28 August 2014|
Vibratory monitoring of gear transmissions in variable regime
1 Laboratoire de Mécanique
BP 32 El Alia, Alger, 16111
Bab Ezzouar, Algerie
2 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: firstname.lastname@example.org
Accepted: 15 May 2014
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.
Key words: Gears / instantaneous frequency / RMS value / spectral analysis
© AFM, EDP Sciences 2014
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