method and device for acoustic detection of a malfunction of an engine equipped with active noise control

摘要

A method and device for acoustic detection of a malfunction of an engine equipped with an active noise control The present invention relates to a method of acoustic detection of at least one malfunction (dis) of a motor, the motor generating a primary noise po which is handled by an active noise control system which outputs to the noise reduction targets an acoustic signal pc produced by at least one trigger and which is connected by a transfer function to a y signal produced by the said active noise control system, said dysfunction (dis) having an identifiable acoustic signature on the primary noise po at the noise reduction targets, characterized in that it comprises the following steps: acquisition of said y signal produced by the active control; Identifying the possible onset of the dysfunction through a surveillance system that exploits the knowledge of y and h and issues a warning message if appropriate.