汽车悬架运动学特性参数优化方法

管欣¹, 逄淑一¹, 詹军¹, 秦民², 高立新³

1.吉林大学汽车动态模拟国家重点实验室;2.一汽技术中心;3.奇瑞汽车股份有限公司



摘要:

为解决汽车悬架运动学特性参数优化难题,提出用数学语言描述悬架运动学特性参数的约束条件,及利用牛顿迭代法进行优化的方法.该方法能快速找出所需调整的设计变量,并能快速有效地搜索到最优解,适合于多设计变量、多目标函数的优化.针对某样车后悬架前束角及外倾角存在的问题,应用该方法对目标函数影响较大的设计硬点坐标值进行优化.结果表明,2次迭代后,使悬架运动学特性达到较为合理的设计状态.

关键词:  车辆工程  底盘调教  悬架优化  多目标优化

DOI：10.11918/j.issn.0367-6234.2011.01.029

分类号:U463.33

基金项目:国家高技术研究发展计划资助项目(2006AA110101);吉林省科技发展计划重点项目(2008006)



Optimization of suspension kinematics characteristic parameters

GUAN Xin¹, PANG Shu-yi¹, ZHAN Jun¹, QIN Min², GAO Li-xin³

1.State Key Laboratory of Automobile Dynamic Simulation,Jilin University,130022 Changchun,China;2.China FAW Group Corporation R & D Center,Changchun 110025,China;3.Chery Automobile Co. Ltd. 241009 Wuhu,Anhui,China)

Abstract:

To solve the problem of optimization of vehicle suspension kinematics,a new method to describe the kinematics constraint conditions by mathematics and to optimize the kinematics parameters by Newton iteration method is presented. With it,the proper variable of the suspension and the optimum solution can be found quickly,so that it is suitable to the optimization of suspension kinematics with multi-variable and multi-objective function. Taking a off-road vehicle’s problem in toe angle and camber angle as an example,the optimization results of hard-points coordinates show that the desired characteristics of the suspension kinematics can be achieved in two step iterations.

Key words:  vehicle engineering  chassis tuning  suspension optimization  multi-objective optimization