The paper presents the results of aircraft cabin noise reduction tests conducted in a full scale, furnished aft cabintest section of a DC-9 aircraft, using activ structural acoustic control (ASAC) techniques. The active control sources consisted of a set of 34 piezzoceramic 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 configurations 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 the noise reduction were achieved for several, but not all, excitation cases.
Active structural acoustic control of aircraft cabin noise using optimized actuator arrays - Laboratory tests
Aktive strukturelle akustische Minderung von Flugzeugkabinengeräuschen mit optimierter Anordnung der Aktuatoren - Laborversuche
1995
9 Seiten, 10 Bilder, 3 Tabellen, 3 Quellen
Conference paper
English
British Library Conference Proceedings | 1995
|Aircraft Cabin Noise Reduction Tests Using Active Structural Acoustic Control
British Library Conference Proceedings | 1993
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