In an overview the noise and vibration problems of a helicopter are discussed with respect to the major sources and the regions most seriously affected. The helicopter main rotor is identified for playing a dominant role under these aspects. Therefore it is analyzed concerning its noise and vibration generating mechanisms in further detail. Subsequently the different passive, active, and adaptive concepts for suppression, respectively reduction are surveyed. Due to its conceptual advantages with a high degree of structural integration the adaptive blade twist with piezoelectric fiber composites to provide the actuation authority is chosen for a close-up examination and is presented through the sequencing modeling steps.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Adaptive concepts to reduce noise and vibrations of helicopter rotors


    Contributors:


    Publication date :

    2002


    Size :

    15 Seiten, 13 Bilder, 16 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The Practical Implementation of an Actively Controlled Flap to Reduce Vibrations in Helicopter Rotors

    Millott, T. A. / Friedmann, P. P. / American Helicopter Society | British Library Conference Proceedings | 1993


    Tabs Reduce Helicopter-Blade Vibrations

    Campbell, T. G. | NTRS | 1985


    High-speed noise of helicopter rotors

    Shenoy, K. R. | NTRS | 1982


    Design of helicopter rotors to noise constraints

    Schaeffer, E. G. / Sternfeld, H., Jr. | NTRS | 1978