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Detection of chipped tooth in gears by the novel vibration residual technology

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Author(s): Len Gelman | Ian Jennions | I Petrunin

Journal: International Journal of Prognostics and Health Management
ISSN 2153-2648

Volume: 2;
Issue: 2;
Start page: 32;
Date: 2011;
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Keywords: gearbox damage detectio | chipped tooth | residual technology | likelihood ratio

ABSTRACT
Novel vibration residual technology is applied for the first time for detecting a partly-missing (chipped) tooth in a gearbox of the machine fault simulator (MFS). One stage gearbox consists of two bevel gears. The load on the gearbox was applied by a magnetic brake system. An advanced automatic technology for the time synchronous averaging of the raw gear vibrations has been employed; this technology does not require speed data. An advanced technique based on the likelihood ratio is developed for decision making. A partly missing tooth has been continuously detected throughout the whole test duration without false alarms and missed detections.
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