Snecma

Aziz Sif

Jean-Remi Andre Masse

Xavier Flandrois

Christian Aurousseau

Benjamin Pierre Lamoureux

Regis Michel Paul Deldalle

Jean-Rémi André Masse

Hicham Janati Idrissi

Francis Marquisseau

Régis Michel Paul Deldalle

Regis Michel 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 method for monitoring a control device of a fuel metering valve of an aircraft turbojet engine, the control device supplying a control current to a servo valve in order to modify the position of the fuel metering valve. The method includes determining the position of the fuel metering valve during a flight of the aircraft, determining the travelling speed of the fuel metering valve, and determining the control current when the travelling speed of the fuel metering valve is zero. A mean control current is calculated when the travelling speed of the fuel metering valve is zero, the mean control current forming an indicator of deterioration of the control device. The deterioration indicator is compared with a reference base of indicators with deterioration so as to infer the type of deterioration from it, and an abnormality score is calculated for the deterioration indicator. The abnormality score is compared with a decision threshold of abnormality characteristic of the type of deterioration, and an alarm is released in case of violation of the decision threshold of abnormality.

Method for monitoring a control device of a fuel metering valve of a turbojet engine

A method for monitoring a servo-control loop () of an actuator system () for actuating variable-geometry components of a turbojet, said method comprising:

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Vigneux sur Seine, France

Aziz Sif