A. Concilio, F.S. Del Gatto, L. Lecce

This paper deals with some numerical and experimental activities related to the possibility of controlling sound transmission / radiation from elastic plates using multiple piezoelectric patches acting both as actuators and sensors. Starting from the available results on beam structures, an actuatfon and sensing model of piezoceramic patches bonded to an elastic plate was developed. Based on these results, a global numerical FEM model of the plate, with piezoelectric devices and a control system was set up. Experimental results achieved on a simple aluminum cantilever rectangular plate, show good agreement with the numerical simulations. Such a validated model of piezoceramic patches, has been employed for a numerical active noise control system applied to a double wall partition, which may be viewed as a simplified model of the combination of a trim panel and an aircraft fuselage skin panel. This stuctural-acoustic system was modelled via FEM. A feedforward control algorithm based on the LMS technique was employed. The implemented cost function takes into account either global vibrational energy {Ev) or free-field sound power radiation (SWR). Some preliminary results on the best positioning of the piezoceramic patches have been achieved.

DGLR/AIAA 14th Aeroacoustics Conference, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 9 Seiten

DGLR-Bericht, 1992, 1992-03, DGLR/AIAA 14th Aeroacoustics Conference - Proceedings; S.692-700; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1992