G.P. Mathur, B.N. Tran, M.A. Simpson

This paper presents the results of aircraft cabin noise reduction tests conducted in a full scale, furnished aft cabin test section of a DC-9 aircraft, using active structural acoustic co11trol (ASAC) techniques. The active control sources consisted of a set of 34 piezoceramic actuators bonded to the fuselage skin, combined into 16 groups (since the system controller has 16 output drive channels). The purpose of these tests was to compare the reductions obtained using a baseline actuator configuration with several optimized configurations, for harmonic excitation of the structure at several frequencies using acoustic and/or vibration sources. The baseline configuration was guided by the modal characteristics of the acoustic cavity and fuselage structure. The optimized configurations were determined using a numerical optimization routine and clustering algorithm to a suitably defined cost function. The tests showed that significant increases in noise reduction were achieved for several, but not all, excitation cases.

First Joint CEAS/AIAA Aeroacoustics Conference, München, 1995

Conference Paper

englisch

21,0 x 29,7 cm, 9 Seiten

DGLR-Bericht, 1995, 1995-01, First Joint CEAS/AIAA Aeroacoustics Conference - Proceedings; S.605-613; 1995; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1995