基于Kriging模型的某轻型货车悬架系统多目标优化  

Multi-Objective Optimization of Suspension System of a Light Truck Based on Kriging Model

作　　者：王中兴 王良模[1] 袁刘凯[2] 谢桃新[2] WANG Zhong-xing;WANG Liang-mo;YUAN Liu-kai;XIE Tao-xin(School of Mechanical Engineering,Nanjing University of Science and Technology,Jiangsu Nanjing 210094,China;Nanjing IVECO Automobile Co.,Ltd,Jiangsu Nanjing 211806,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]南京依维柯汽车有限公司,江苏南京2118062

出　　处：《机械设计与制造》2018年第A02期31-34,39,共5页Machinery Design & Manufacture

基　　金：江苏省产学研前瞻性联合研究项目(BY2015004-02)

摘　　要：针对底盘调校过程中操纵稳定性和行驶平顺性两个目标相互矛盾的问题,对某轻型货车悬架刚度阻尼进行优化匹配。在多体动力学软件ADAMS中建立整车的动力学模型,并通过操稳性道路试验验证模型的准确性。选取前后悬架的刚度、减震器阻尼曲线系数及后稳定杆的扭转刚度为优化变量,以汽车的操纵稳定性和行驶平顺性为优化目标,采用拉丁超立方试验设计拟合Kriging代理模型,利用遗传算法NSGA-Ⅱ对悬架系统进行多目标优化得到Pareto最优解集,并选取一个最优解进行ADAMS仿真验证。结果表明,汽车的行驶平顺性和操纵稳定性都得到了改善。In view of the trade-off between the handling stability and the ride comfort in the process of chassis tuning,a light truck’s suspension rate and absorbers damping curve have been matched.A virtual prototype vehicle model was been built through multi-body dynamic software ADAMS and the road test of handing stability was implemented to validate this model.Spring stiffness and shock absorb damping coefficients of the front and rear suspensions and rear anti-roll bar roll angular stiffness were taken as optimization parameters.The handling stability and ride comfort were taken as optimization objectives.The Kriging surrogate model was constructed based on Latin hypercube design.Then multi-objective optimization for suspension system was performed with NSGA-Ⅱgenetic algorithm,and the Pareto optimal was obtained,one of the optimal solutions was choosed to simulate with ADAMS model.The results indicated that,the vehicle handling stability and ride comfort were both developed.

关 键 词：悬架系统 操纵稳定性 平顺性 Kriging代理模型 NSGA-Ⅱ多目标优化 

分 类 号：TH16[机械工程—机械制造及自动化] TP461.3[自动化与计算机技术]