System for monitoring the health of a helicopter

Abstract

The invention relates to a system for monitoring the health of a helicopter, comprising a helicopter and a device for determining a change in state of the engine that is configured to collect data measured by engine sensors and external conditions during a stable flight phase and to process said measured data in the following way: comparing said measured data with a reference model of the engine, determining, at each time interval, an instantaneous discrepancy between each item of data measured and each item of data estimated by the reference model of the engine, determining, throughout the stable flight phase, an overall discrepancy between the measured data and the data estimated by the reference model of the engine, determining, at each time interval of the stable flight phase, an intrinsic residual corresponding to a difference between the instantaneous discrepancy and the overall discrepancy, determining a deviating portion corresponding to the part of the intrinsic residual that does not satisfy a predetermined criterion, each deviating portion containing an item of information relating to a pilot action that is not recorded, and determining a corrected residual corresponding to the instantaneous discrepancy from which the deviating portion has been subtracted, the corrected residual being analysed in order to determine whether the state of the engine has changed.

Description

technical field [0001] The invention relates to a system for monitoring the health of a helicopter, in particular making it possible to detect changes in the state of the helicopter's engines. The invention also relates to the method implemented by the system. [0002] The invention finds application in the field of ground maintenance of aircraft, especially helicopters. Background technique [0003] In the field of ground maintenance of helicopters, it is known to control the health of the helicopter's engine, that is to say the operating state of the engine, in order to determine especially when maintenance is required. In general, methods for controlling the health of an engine include comparing the input and output of the engine to a reference model under constant external conditions. The reference model can be a physical model based on physical laws, a learning model constructed from real data, or a model that relies on a combination of a physical model and a learning...

AI Technical Summary

Problems solved by technology

However, this method cannot automatically detect unrecorded pilot actions

[0008] Thus, in the method of document FR3003032, as in most known methods for monitoring the health of an engine, the pilot action is interpreted as a change in the state of the engine, with the consequence of generating false alarms and sending the helicopter for maintenance while the engine actually There are no faults requiring repair on

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