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.
Improvements to car/caravan handling and high speed stability through computer simulation
Verbesserung des Handlings von Zugwagen und Caravan und der Stabilität bei höheren Geschwindigkeiten durch Computersimulation
1995
15 Seiten, 10 Bilder, 4 Tabellen, 12 Quellen
Aufsatz (Konferenz)
Englisch
Wohnwagen , Hochgeschwindigkeit , Stabilität , Rechnersimulation , Freiheitsgrad , Modellmethode , praktische Untersuchung , Luftreifen , Nichtlinearität , Last (mechanisch) , Masse (physikalische Größe) , Trägheit , Schwerpunkt , Schwingungsdämpfung , Spurweite , Fahrzeuganhänger , Anhängerkupplung
Simulation of coupled car and caravan handling behavior
Kraftfahrwesen | 1996
|Simulation of Coupled Car and Caravan Handling Behaviour
Taylor & Francis Verlag | 1996
|Simulation of Coupled Car and Caravan Handling Behaviour
Online Contents | 1996
|Simulation of coupled car and caravan handling behaviour
Tema Archiv | 1996
|British Library Conference Proceedings | 2006
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