Accurate road profiles are useful in vehicle design, such as for simulation of durability and ride quality. Laser/inertial profilometers typically record 1 mm wide profiles. The question is how well such a profile matched perceived vehicle wheel roughness. The objective here was to create a more representative wheel track longitudinal profile. Simulated and measured wheel vibration was compared on a 6 km long road. Simulations were made for several definitions of the profile. Results for single laser sensor profiles showed reasonable likeness to truck perceived roughness. By far the best likeness (14.5% better) was achieved when the profile was based on triangular 25%-50%-25% weighted data from three sensors in the wheel track. Clearly, vehicle engineers can benefit from using multiple laser profile sensors, instead of a single sensor. This will improve test accuracy, thus reducing vehicle design project lead times and costs. However, it is possible that part of the improvement could be a consequence of more averaging of shortwave longitudinal roughness, rather than a systematic averaging across the tyre width. An extension of this work should seek to study to what extent three repeat runs produced by a single sensor would predict vehicle motion. Further work should also seek the best likeness that could be produced when the tyre model is optimised. In this work, a simple 300 mm base-length moving average has been used. A good method could be to throw out everything from the profile that would correspond to content over about 25 Hz.


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    Titel :

    Comparing road profiles with vehicle perceived roughness


    Weitere Titelangaben:

    Vergleich von Straßenprofilen mit fahrzeugempfundener Rauheit


    Beteiligte:
    Ahlin, Kjell (Autor:in) / Granlund, Johan (Autor:in) / Lindström, Fredrik (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2004


    Format / Umfang :

    17 Seiten, 12 Bilder, 1 Tabelle, 15 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Comparing road profiles with vehicle perceived roughness

    Ahlin,K. / Granlund,J. / Lindstroem,F. et al. | Kraftfahrwesen | 2004


    Comparing road profiles with vehicle perceived roughness

    Ahlin,K. / Granlund,J. / Lindstroem,F. et al. | Kraftfahrwesen | 2004


    Modelling of road profiles using roughness indicators

    Johannesson,P. / Rychlik,I. / SP Tech.Res.Inst.of Sweden,SE et al. | Kraftfahrwesen | 2014


    Modelling of road profiles using roughness indicators

    Johannesson, Pär | Online Contents | 2014