26-04-2012 дата публикации
Номер: US20120101706A1
A method for monitoring a servo-control loop () of an actuator system () for actuating variable-geometry components of a turbojet, said method comprising: 1322252122. A monitoring method for monitoring a servo-control loop () of an actuator system () for actuating variable-geometry components of a turbojet , the actuator system () comprising at least a servovalve () , and first and second actuators ( , ) , said method comprising:{'b': 20', '1', '17', '4', '14', '2, 'an estimation step (E) of estimating a plurality of monitoring parameters (m-m) from operating data (d-d) of the servo-control loop ();'}{'b': '30', 'an evaluation step (E) of evaluating a plurality of indicators (i_EVS, i_EVA, i_EVB, i_CID, i_CINT, i_EPA, i_EPB, i_SOMA, i_SOMB, and i_EWRAP) from the monitoring parameters;'}{'b': '40', 'an evaluation step (E) for evaluating at least one signature matrix, each signature matrix being representative of the values of at least some of the indicators; and'}{'b': '50', 'a detection and location step (E) of detecting and locating a degradation affecting the servo-control loop as a function of said at least one signature matrix;'}{'b': '20', 'claim-text': [{'b': 1', '2', '21', '22, 'a category of parameters representative of positions (VSV, VSV, VSVsel) of the actuators (, );'}, {'b': '25', 'a category of parameters representative of coefficients of autoregressive models used for predicting actuator positions as a function of a control current (iCMD) of the servovalve (); and'}, {'b': 25', '3, 'a category of parameters representative of the control current (iCMD) of the servovalve () or an integral current of the servo-control loop ().'}], 'wherein, during the estimation step (E), an estimate is made of a plurality of parameters selected from at least one of the following categories24713. A monitoring method according to claim 1 , wherein at least one of said parameters (m-m) is estimated from an autoregressive model depending on at least one exogenous variable ( ...
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