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.


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    Title :

    Active structural acoustic control of aircraft cabin noise using optimized actuator arrays - Laboratory tests


    Additional title:

    Aktive strukturelle akustische Minderung von Flugzeugkabinengeräuschen mit optimierter Anordnung der Aktuatoren - Laborversuche


    Contributors:
    Mathur, G.P. (author) / Tran, B.N. (author) / Simpson, M.A. (author)


    Publication date :

    1995


    Size :

    9 Seiten, 10 Bilder, 3 Tabellen, 3 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Active Structural Acoustic Control of Aircraft Cabin Noise Using Optimized Actuator Arrays - Laboratory Tests

    Mathur, G. P. / Tran, B. N. / Simpson, M. A. et al. | British Library Conference Proceedings | 1995



    Aircraft Cabin Noise Reduction Tests Using Active Structural Acoustic Control

    Mathur, G. / Tran, B. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1993