摘要
为了提高赛车轮胎侧向附着合力及转向极限侧向加速度,提出了一种考虑轮胎侧偏特性的转向几何。通过分析轮胎侧偏角的影响,确定了整车转向瞬心位置,并建立了三自由度整车模型。结合轮胎力学模型,以最大化整车轮胎侧向附着合力为目标,采用隔代映射遗传算法对考虑轮胎侧偏特性的转向几何进行求解。整车仿真和试验结果表明,相比阿克曼转向几何,考虑轮胎侧偏特性的转向几何可以更有效地增大整车轮胎的侧向附着合力,提高赛车在极限工况下的转弯性能。
For improving the tire lateral resultant forces and lateral accelerations of racing cars,a steering geometry was proposed considering the effects of tire cornering characteristics.The instantaneous center of steering was defined by analyzing the impacts of tire slip angles,and a 3-DOF full vehicle model containing tire model was developed for steering simulation.The steering geometry was obtained via optimization of maximizing lateral resultant forces of tires by IP-GA.Simulations and tests were conducted to validate the theoretical basis of the present steering geometry.The results indicate that the maximum lateral resultant force is raised under the design using the present steering geometry compared with Ackerman steering geometry.Thus the steering performance within extreme condition could be improved.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2017年第9期1106-1111,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51205117)
关键词
转向几何
轮胎侧偏特性
轮胎侧向力
优化
赛车
steering geometry
tire cornering characteristic
tire lateral force
optimization
racing car
