It is well known that car/caravan combination system can be unstable at high speed. This study addresses the problem of high speed instability through simulation using a twenty four degree of freedom coputer model and experimental testing of an instrumented car and caravan. The mathematical model developed for this study included the effect of tyre nonlinear behavior, axle lateral load transfer and compliance at the tow-ball in a dynamic model. The model accounted for roll, pitch, yaw, bounce, lateral and longitudinal degrees of freedom for both the car and caravan. Using an adjustable frame built on to a standard, single axle chassis, the effect of caravan mass and inertia on lateral directional stability was measured experimentallay. Having obtained good correlation between simulation and experiment, the destablilising effect of caravan design parameters such as mass, inertia, centre of gravity height, secondary suspension rate and damping, wheel track and axle longitudinal position were investigated through simulation. It was found that caravan mass, yaw inertia, axle longitudinal position and tow-ball load were the most important parameters to influence stability. The car/caravan combination system stability was less sensitive to changes in secondary suspension parameters and other inertial properties, although handling characteristics such as roll steer and roll over capacity were affected.


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    Titel :

    Improvements to car/caravan handling and high speed stability through computer simulation


    Weitere Titelangaben:

    Verbesserung des Handlings von Zugwagen und Caravan und der Stabilität bei höheren Geschwindigkeiten durch Computersimulation


    Beteiligte:
    Fratila, D. (Autor:in) / Darling, J. (Autor:in)


    Erscheinungsdatum :

    1995


    Format / Umfang :

    15 Seiten, 10 Bilder, 4 Tabellen, 12 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Simulation of coupled car and caravan handling behavior

    Fratila,D. / Darling,J. / Univ.of Bath,School of Mech.Engng.,GB | Kraftfahrwesen | 1996


    Simulation of Coupled Car and Caravan Handling Behaviour

    FRATILA, D. / DARLING, J. | Taylor & Francis Verlag | 1996



    Simulation of coupled car and caravan handling behaviour

    Fratila, D. / Darling, J. | Tema Archiv | 1996


    AVEC060078 Smart Caravan Chassis Design, Matching Low-Speed Manoeuvrability with High-Speed Stability

    Pauwelussen, J. / Merts, M. / van Dijk, M. et al. | British Library Conference Proceedings | 2006