基于分叉理论的前轮外倾角对极限工况下车辆转向行驶稳定性影响研究  

Study on Effects of the Front Wheel Camber Angle on Vehicle Steering Stability in Critical Situations Based on Bifurcation Theory

作　　者：肖怀阳[1] 魏道高[1] 蒋艮生[1] 

机构地区：[1]合肥工业大学汽车与工程机械学院,安徽合肥230009

出　　处：《汽车工程学报》2011年第2期101-105,共5页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金资助项目(51050002)

摘　　要：为了探索车轮外倾角对车辆极限行驶工况下转向失稳影响的规律,开展了影响汽车行驶稳定性方面的研究。建立了含有外倾角的横向横摆二自由度车辆模型,以魔术公式表达轮胎侧向力,用非线性数值方法得到了车辆β～ω相图以及鞍结点的位置,分析了车轮外倾角对于吸引子跃迁行为的影响。结果表明,在极限工况下,4°的外倾角会使稳定转角范围减少约50%,丰富了车辆极限工况下的失稳机理,为车轮外倾角的主动控制提供了理论依据。To explore the influence of wheel camber angle on vehicle steering stability in critical situations, a two-degree-of-freedom vehicle handling mathematical model was built with taking camber angles into consideration. Tile model was simulated in tile yaw rate and sideslip angle domain by using numerical analysis. The response of saddle-node with varying camber angles was obtained. It is concluded that as the camber angle is increased to 4o, the stability domain is decreased to 50% and the handling quality declines as well. This finding can provide a theoretical basis for active control of vehicle camber angle.

关 键 词：车轮外倾角 转向行驶 稳定性 鞍结分叉 

分 类 号：U461.61[机械工程—车辆工程]