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AssigneeSnecma
InventorGeoffroy Nicq
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The present invention relates to a method for acoustically detecting at least one malfunction (DYS) of a motor, the motor generating a primary noise Po that is treated by an active noise control system emitting, at the noise reduction targets, an acoustic signal Pc produced by at least one actuator and connected by a transfer function H to a signal Y produced by said active noise control system, said malfunction (DYS) having an acoustic signature identifiable in the primary noise Po at the noise reduction targets, characterised in that it comprises the following steps: acquisition of said signal Y produced by the active control system; identification of the appearance, if any, of a malfunction by a monitoring means that uses the knowledge of Y and H and emits an alert message if warranted.
Method for acoustically detecting at least one malfunction of an engine, the engine generating a primary noise Po which is processed by an active noise control system by emitting, towards the noise reduction targets, an acoustic signal Pc which is produced by at least one actuator and is linked by a transfer function H to a signal Y for said at least one actuator, which signal is produced by said active noise control system, said malfunction having an acoustic signature which can be identified in the primary noise Po in the region of the noise reduction targets, of the method comprising:
Device for acoustically detecting at least one malfunction of an engine, the engine generating a primary noise Po, which device is arranged to be used in the presence of an active noise control system which emits, towards the noise reduction targets, an acoustic signal Pc which is produced by at least one actuator and is linked by a transfer function H to a control signal Y for said at least one actuator, which signal is produced by said active noise control system, said malfunction having an acoustic signature which can be identified in the primary noise Po at the noise reduction targets, the device comprising:
Dependencies are inferred from the claim text.