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A Study on Motorcycle-Rider System Simulations
Technical Paper
2002-32-1798
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English
Abstract
It is necessary to predict motorcycle performance at an early stage of development to minimize the period for designing, experimenting, and tuning. In order to do that, we have developed a motorcycle model with a mechanical dynamic simulation program. This model includes the bodies of a motorcycle, aerodynamic forces, tire forces, engine characteristics, simplified gear trains and driving chains, and rider operations. With this program, we have conducted motion simulation on steady state turn and disturbance response tests with two kinds of tire stiffness. We have also conducted experiment on the steady state turn and disturbance response tests to validate the program. In this paper, we analyze the results of the simulation and experiment. As a result, it is confirmed that the simulation results accord with the experimental results, and we have found that the steer angle and bank angle at the steady state turn depend on tire stiffness. The frequencies and damping ratios at the disturbance response tests are also affected by tire stiffness. We have also conducted simulations on disturbance response tests with different crankshaft rotating directions and found that the stability is affected by the direction. In this case, simulations are effective because these tests cannot easily be experimented.
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KUBOTA, T., YAGI, E., SAKAMOTO, M., TAKATA, S. et al., "A Study on Motorcycle-Rider System Simulations," SAE Technical Paper 2002-32-1798, 2002.Also In
References
- Imaizumi H. Fujioka T. Motorcycle-Rider System Dynamics by Multibody Dynamics Analysis -2nd Report: Parameter Studies on Wobble Mode Dynamics by Experiments and Simulations- Trans. of JSAE 29 3 1998
- Imaizumi H. Fujioka T. Motorcycle-Rider System Dynamics on Multibody Dynamics Analysis -7th Report: Motorcycle Handling and Stability Analysis- Proc. of JSAE Spring Convention No.69-1 2001