METHOD AND DEVICE FOR ACOUSTICALLY DETECTING MALFUNCTION OF MOTOR HAVING ACTIVE NOISE CONTROL Russian patent published in 2018 - IPC G01M15/14 

FIELD: acoustics.

SUBSTANCE: 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.

EFFECT: technical result is a reduction of interference in the operation of the active monitoring system and an increase in the reliability of acoustic detection of at least one motor malfunction.

11 cl, 6 dwg