| 摘要 |
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 comprising: a step for determining the position of the fuel metering valve during a flight of the aircraft; a step for determining the travelling speed of the fuel metering valve; a step for determining the control current when the travelling speed of the fuel metering valve is zero; a step for calculating a mean control current when the travelling speed of the fuel metering valve is zero, the mean control current forming an indicator of deterioration of the control device; a step for comparing the deterioration indicator with a reference base of indicators with deterioration so as to infer the type of deterioration from it; a step for calculating an abnormality score for the deterioration indicator; a step for comparing the abnormality score with a decision threshold of abnormality characteristic of the type of deterioration; and a step for releasing an alarm in case of violation of the decision threshold of abnormality.
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