A smart trim panel used as a secondary source for active noise control in aircraft is developed and tested. The smart trim panel is a rectangular segment of aircraft trim panel which is suspended by a flexible support. This support converts the stiff trim panel into flexibly mounted pistons which can be driven by light-weight and low-profile force actuators. The smart trim panel has many advantages as an acoustic source over traditional loudspeakers: it is of lower profile, lower mass, and requires only a simple modification of materials already installed on aircraft. The static and dynamic properties of a smart trim panel are studied, verifying that when subjected to low-frequency (< 500 Hz) excitation, it vibrates in the efficiently radiating piston mode. Real-time active noise control experiments are conducted in a laboratory-scale fuselage model using the smart trim panels as secondary sources. Global attenuation of sound pressure levels of up to 15 dB is realized.


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    Title :

    Experimental study of smart segmented trim panels for aircraft interior noise control


    Additional title:

    Experimentelle Untersuchung von intelligenten, segmentierten Trimmpaneelen für die Regelung des Innengeräusches in Flugzeugen


    Contributors:
    Hirsch, S.M. (author) / Meyer, N.E. (author) / Westervelt, M.A. (author) / King, P. (author) / Li, F.J. (author) / Petrova, M.V. (author) / Sun, J.Q. (author)

    Published in:

    Journal of Sound and Vibration ; 231 , 4 ; 1023-1037


    Publication date :

    2000


    Size :

    15 Seiten, 12 Bilder, 34 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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