Abstract
In this paper, two alternative front suspension systems and their influence on motorcycle nonlinear dynamics are investigated. Based on an existing high-fidelity motorcycle mathematical model, the front end is modified to accommodate both Girder and Hossack suspension systems. Both of them have in common a double wishbone design that varies the front end geometry on certain manoeuvrings and, consequently, the machine’s behaviour. The kinematics of the two systems and their impact on the motorcycle performance are analysed and compared to the well-known telescopic fork suspension system. Stability study for both systems is carried out by combination of nonlinear dynamical simulation and root-loci analysis methods.
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