Author(s)

F. Moriconi, P. Mandurino & L. Mori

Abstract

In this paper a technique is presented for the active structural acoustic control of harmonic sound radiated from an electrical machine. In the study, we consider the noise radiated by the heat-exchanger enclosure of a large size induction motor; the sound is radiated harmonically by the enclosure panels, excited by structure borne vibrations. The control source is a spatially distributed piezoelectric ceramic patch actuator attached to the enclosure panels, and the sensor is a vibration transducer or a microphone. A digital controller and digital processing software are designed based on a feedback algorithm. The paper describes: the fun

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