Airbus Helicopters

Institut National Des Sciences Appliquees De Lyon

Engie Green France

Maia Eolis

Hugo Andre

Hervé Morel

Jérémy Jouve

Mohamed El Badaoui

Didier Remond

Anas Had

Colin Lefebvre

A method and a device for detecting a fault in a mechanical system comprising a rotating member and a vibration sensor transmitting a temporal vibration signal. The method comprises processing the temporal vibration signals transmitted over a predetermined period in order to transform the temporal vibration signals firstly into angular vibration signals, then into frequency vibration signals. Next, series of amplitudes are generated, each series being associated with a specific frequency channel and comprising the amplitudes of the frequency vibration signals for this frequency channel. The frequency channels displaying an increasing trend consistent with the fault of interest are then identified. The frequency channels that display an increasing trend are then compared with characteristic frequencies of a known fault of interest in order to check for the possible presence of such a fault in the mechanical system.

Method and device for detecting a fault in a mechanical system comprising at least one rotating member

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Roanne, France

Hugo Andre