Abstract
Motorcycling is a fascinating kind of transportation. While the riders’ direct exposure to the environment and the unique driving dynamics are essential to this fascination, they both cause a risk potential which is several times higher than when driving a car.
This chapter gives a detailed introduction to the fundamentals of motorcycle dynamics and shows how its peculiarities and limitations place high demands on the layout of dynamics control systems, especially when cornering. The basic principles of dynamic stabilization and directional control are addressed along with four characteristic modes of instability (capsize, wobble, weave, and kickback). Special attention is given to the challenges of braking (brake force distribution, dynamic over-braking, kinematic instability, and brake steer torque induced righting behavior).
It is explained how these challenges are addressed by state-of-the-art brake, traction, and suspension control systems in terms of system layout and principles of function. It is illustrated how the integration of additional sensors – essentially roll angle assessment – enhances the cornering performance in all three categories, fostering a trend to higher system integration levels.
An outlook on potential future control systems shows exemplarily how the undesired righting behavior when braking in curves can be controlled, e.g., by means of a so-called brake steer torque avoidance mechanism (BSTAM), forming the basis for predictive brake assist (PBA) or even autonomous emergency braking (AEB). Finally, the very limited potential of brake and chassis control to stabilize yaw and roll motion during unbraked cornering accidents is regarded, closing with a promising glance at roll stabilization through a pair of gimbaled gyroscopes.
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Acknowledgments
The authors would like to thank Jörg Reissing, Alfred Eckert, and Jürgen Bachmann, who, as co-authors of the first two editions, made a huge contribution towards the writing of this chapter. Special thanks also go to all our contacts at BMW Motorrad, KTM, Honda, Bosch, and Continental for providing us with technical information and images.
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Schröter, K., Pleß, R., Seiniger, P. (2016). Vehicle Dynamics Control Systems for Motorcycles. In: Winner, H., Hakuli, S., Lotz, F., Singer, C. (eds) Handbook of Driver Assistance Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-12352-3_42
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DOI: https://doi.org/10.1007/978-3-319-12352-3_42
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