Advances In The Modelling Of Motorcycle Dynamics

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Starting from an existing sophisticated motorcycle dynamics model, which permits simulation of reasonably general motions and stability, modal and response computations for modest perturbations from any trim condition, improvements are described. The benefits show the predictions of the model to be in general agreement with observations of motorcycle behaviour from the field and they suggest that frame flexibility remains an essential design and style and evaluation region, in spite of improvements in frame styles more than current years. In distinct, the "Magic Formula" motorcycle tyre model is utilised and full sets of parameter values for modern tyres are derived by identification strategies. The new model is utilized 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 therapy of the monoshock rear suspension mechanism with sample results, (e) parameter values describing a modern higher efficiency machine and rider, (f) steady-state equilibrium and power checking and (g) steering handle. Motorcycle rider parameters have considerable influences on the behaviour, with benefits constant with a commonly held view, that lightweight riders are additional probably to suffer oscillation difficulties than heavyweight ones.

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