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Theses

Modélisation électro-mécanique de transmissions par engrenages : Applications à la détection et au suivi des avaries

Abstract : The fault diagnosis in geared transmissions has been traditionally based on vibration monitoring but the implementation of sensors can be expensive and, in some applications, present technical difficulties. In this thesis, an original way of detecting faulty gears driven by electrical motors is proposed based on the monitoring of the motor currents. The corresponding electromechanical coupled system is numerically simulated by combining i) an electrical dynamic model of asynchronous motors (Kron’s model and permeance network model) and ii) a mechanical dynamic model of spur and helical gears (3D lumped parameter model) including the shafts and bearings. Some classic motor defects (rotor eccentricity) and gear faults (tooth spalls) are considered and an iterative solution technique is presented which makes it possible to solve the coupled electromechanical problem. A number of results are presented, which illustrate the possibility of tooth fault detection by stator current measurements with regard to the position and dimensions of the defect. Based on these simulations, it is concluded that motor current signature analysis can be a viable tool for the detection of localized gear faults such as tooth pitting.
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https://tel.archives-ouvertes.fr/tel-00743722
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Submitted on : Friday, October 19, 2012 - 5:37:14 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:29 PM

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  • HAL Id : tel-00743722, version 1

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Nabih Feki. Modélisation électro-mécanique de transmissions par engrenages : Applications à la détection et au suivi des avaries. Autre. INSA de Lyon, 2012. Français. ⟨NNT : 2012ISAL0041⟩. ⟨tel-00743722⟩

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