Patent ID: 8275507
Filing Date: 2012-09-25
Classification: F02K,F05D,G05B

Abstract:
1. A method of monitoring a thrust reverser of a turbojet, the reverser being actuated under the control of an electric motor, said method consisting in determining, using a processor, a maintenance notice for said thrust reverser on the basis of a weighted combination of a plurality of provisional maintenance notices, each relating to a category of parameters associated with at least one phase of an operating cycle of the thrust reverser, the category being selected from: a category of parameters representative of a duration of said phase; a category of parameters representative of energy seen by the electric motor during said phase; a category of parameters representative of a torque seen by the electric motor at a predefined instant of said phase; and a category of parameters representative of a duration during which a setpoint speed of rotation for the electric motor differs from a speed of rotation of the motor as measured during said phase; each provisional notice relating to a parameter category being generated by analyzing values obtained during at least one operating cycle of the thrust reverser, for at least one identified parameter of said category, relative to a degradation threshold associated with said parameter, wherein the analysis for an identified parameter in a category comprises estimating a variation in the value of said parameter over successive operating cycles of the thrust reverser on the basis of values that have been obtained for said parameter, wherein during the analysis, it is also determined whether, for a determined operating cycle of the thrust reverser, an estimated value or an obtained value for said parameter for said cycle crosses the degradation threshold associated with said parameter, and wherein during analysis, if it is determined that the estimated value or the obtained value for the parameter for the determined operating cycle crosses the degradation threshold, then the number of operating cycles remaining for the thrust reverser to perform before reaching a breakdown parameter associated with the parameter is estimated, once the degradation threshold has been crossed.