基于多运动场耦合的转向系统多目标优化设计  

Multi-Objective Optimization Design on Steering System Based on Multi-Motion-Field Coupling

作　　者：石博强[1] 唐歌腾[2] 余国卿[1] 张文明[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]交通运输部公路科学研究院运输车辆运行安全技术交通行业重点实验室,北京100088

出　　处：《北京理工大学学报》2015年第6期580-584,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51075029);北京市自然科学基金资助项目(3093022)

摘　　要：考虑悬挂缸的动刚度特性及轮胎的非线性特性,将转向机构、悬挂、轮胎三运动场进行耦合处理,建立转向系统多目标优化数学模型,对400t重型矿用自卸车转向系统进行更精确地优化设计.应用物理规划法,构建转向系统物理规划优化设计模型,通过遗传算法进行模型求解及初步筛选,最后对车辆进行紧急双移线试验,仿真分析其操纵稳定性,实现转向系统优化解集合的最终筛选,为最优解的确定提供了一种新方法.In order to gain more precise optimization design of the 400 t heavy-duty mining dump truck＇s steering system, meanwhile considering dynamic stiffness characteristic of suspension cylinder and nonlinear characteristic of tire, this paper coupled steering mechanism, suspension and tire these three motion fields, then established the mathematical model of steering system for multi-objective optimization. With the use of physical programming method, the physical programming optimal design model of steering system was established, and the optimal solution and preliminary screening were achieved with genetic algorithm. At last, the Trucksim were used to handle stability simulations, which is the emergency double-lane change test. It ultimately selected the optimal solution for design of steering system, and provided a new method for determining the optimal solution.

关 键 词：多运动场耦合 多目标优化 物理规划 遗传算法 操纵稳定性 

分 类 号：TH122[机械工程—机械设计及理论]