Snecma

Jean-Rémi André Masse

Xavier Flandrois

Christian Aurousseau

Maurice Georges Vernochet

Benjamin Pierre Lamoureux

Aziz Sif

Régis Michel Paul Deldalle

A method monitoring a servo-control loop, including: estimating monitoring parameters from operating data of the servo-control loop; obtaining indicators from the monitoring parameters; determining at least one signature from values of at least some of the indicators; and detecting and locating a degradation affecting the servo-control loop as a function of the at least one determined signature.

Method and a device for monitoring a servo-control loop of an actuator system for actuating variable-geometry components of a turbojet

A process for monitoring a machine including moving pieces, a lubrication system and an electromagnetic sensor fitted with a magnet and two electrodes is disclosed. The sensor is capable of collecting particles present in the lubrication system between the electrodes. The monitoring process includes a step for obtaining measurements of resistance between the electrodes of the sensor, taken during an operating period of the machine; a step for determining from said measurements a first autoregressive mathematical model characterizing the resistance; a step for comparison between the first model and a predetermined reference model; and a step for working out an opinion on maintenance of the machine as a function of the comparison result.

Monitoring particles in a lubrication system

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Saint Cloud, France

Jean-Rémi André Masse