Influence of Road Camber on Motorcycle Stability

被引:10
|
作者
Evangelou, Simos [1 ,2 ]
Limebeer, David J. N. [1 ]
Rodriguez, Maria Tomas [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Elect & Elect Engn, London SW7 2AZ, England
[2] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2AZ, England
来源
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME | 2008年 / 75卷 / 06期
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1115/1.2937140
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
This paper studies the influence of road camber on the stability of single-track road vehicles. Road camber changes the magnitude and direction of the tire force and moment vectors relative to the wheels, as well as the combined-force limit one might obtain from the road tires. Camber-induced changes in the tire force and moment systems have knock-on consequences for the vehicle's stability. The study makes use of computer simulations that exploit a high-fidelity motorcycle model whose parameter set is based oil a Suzuki GSX-R1000 sports machine.. In order to study camber-induced stability trends for a range of machine speeds and roll angles, we study the machine dynamics as the vehicle travels over the surface of a right circular cone. Conical road surfaces allow the machine to operate at a constant steady-state speed, a constant roll angle, and a constant road camber angle. The local road-tire contact behavior is analyzed by approximating the cone surface by moving tangent planes located under the road wheels. There is novelty in the way in which adaptive controllers are used to center the vehicle's trajectory on a cone, which has its apex at the origin of the inertial reference frame.. The results show that at low speed both the weave- and wobble-mode stabilities are at a maximum when tire machine is perpendicular to the road surface. This trend is reversed at high speed, si. lice the weave- and wobble-mode dampings are minimized by running conditions in which to he wheels are orthogonal to the road. As a result, positive camber which is often introduced by road builders to aid drainage and enhance the friction limit of four-wheeled vehicle tires, might be detrimental to the stability of two-wheeled machines. [DOI: 10.1115/1.2937140]
引用
收藏
页码:0610201 / 06102012
页数:12
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