Advances In The Modelling Of Motorcycle Dynamics

Starting from an existing sophisticated motorcycle dynamics model, which enables simulation of reasonably common motions and stability, modal and response computations for smaller perturbations from any trim situation, improvements are described. The final results show the predictions of the model to be in common agreement with observations of motorcycle behaviour from the field and they suggest that frame flexibility remains an vital design and style and analysis area, regardless of improvements in frame designs over current years. In specific, the "Magic Formula" motorcycle tyre model is utilised and total sets of parameter values for contemporary tyres are derived by identification methods. The new model is utilised for steady turning, stability, style parameter sensitivity and response to road forcing calculations. These concern (a) tyre/road get in touch with geometry, (b) tyre shear force and moment descriptions, as functions of load, slip and camber, (c) tyre relaxation properties, (d) a new analytic treatment of the monoshock rear suspension mechanism with sample final results, (e) parameter values describing a contemporary higher performance machine and rider, (f) steady-state equilibrium and 2008 Gsxr 600 Plastics energy checking and (g) steering handle. Motorcycle rider parameters have significant influences on the behaviour, with benefits consistent with a normally held view, that lightweight riders are a lot more most likely to suffer oscillation issues than heavyweight ones.

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