NDLI: Vibratory monitoring of a spalling bearing defect in variable speed regime

Content Provider	EDP Sciences
Author	Khalid Ait Sghir Fabrice Bolaers Olivier Cousinard Jean-Paul Dron
Abstract	Rotating machines monitoring in a non-stationary regime, characterized by the operating parameters (speed, load) variation, presents a particular challenge. The speed variation has an impact on the vibratory response given by the accelerometers and therefore masks any defect that may be detected by classical indicators (for example RMS value). To overcome this problem, a new indicator is proposed. For this, a signal accelerometer and a signal from an optical encoder are acquired simultaneously. An algorithm to estimate the instantaneous speed from the signal delivered by the optical encoder is applied. Then, each sample of the accelerometer signal is divided by its corresponding instantaneous speed sample. The RMS value is then applied to the resulting signal. A model simulation signal is used to test the proposed method. A test rig is performed to extract signals of different degradation states of thrust bearings in variable speed regime. The results show a correlation between the proposed RMS value and the thrust bearings state in variable regime.
Ending Page	136
Starting Page	129
Page Count	8
File Format	HTM / HTML PDF
ISSN	22577777
Alternate Webpage(s)	https://www.mechanics-industry.org/articles/meca/abs/2013/02/mi120108/mi120108.html
e-ISSN	22577750
Issue Number	2
Journal	Mechanics & Industry
Volume Number	14
DOI	10.1051/meca/2013060
Language	English
Publisher	EDP Sciences
Publisher Date	2013-01-01
Access Restriction	Subscribed
Rights Holder	© AFM, EDP Sciences 2013
Subject Keyword	Rolling fatigue contact spalling thrust roller bearing monitoring vibratory analysis instantaneous speed Rolling fatigue contact / spalling / thrust roller bearing / monitoring / vibratory analysis / instantaneous speed
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Materials Science Mechanical Engineering

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