In this article we present the results of a research project of Volkswagen AG and Fraunhofer IWU. It shows new approaches in the development of active mass dampers for transmission applications. The proposed active controlled system enables to reduce the interior sound pressure level of the rear axle gear mesh order by more than 5 dB. By detailed pre-examination of the drivetrain vibrations and transfer paths we gained new insights into the phenomenon of rear axle gear whine. In order to develop solutions to realise the damping of the vibrations we designed and constructed a test bench which consists of the main components of the rear axle unit and its bearings. The vibration phenomenon was replicated by synthetic excitation. Thus we could acquire an adequate control concept combined with a corresponding actuator and experimentally established control parameters. Validations on an experimental vehicle under synthetic excitation and finally under real driving conditions adduced the evidence for the functionality of the proposed system.


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    Title :

    Aktive Geräuschminderung am Hinterachsgetriebe


    Contributors:
    Eulert, S. (author) / Bräunig, J. (author) / Lührs, G. (author) / Bucht, A. (author) / Kunze, H. (author)

    Conference:

    2011


    Publication date :

    2011


    Size :

    15 pages


    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    German




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