灵敏度在车辆动力学分析中的应用  

Application of Sensitivity Method in Vehicle Dynamics

作　　者：唐传茵[1] 郭立新[1] 李华[2] 计伟 

机构地区：[1]东北大学,辽宁沈阳110004 [2]沈阳农业大学,辽宁沈阳110161 [3]抚顺安仪救生装备有限公司,辽宁抚顺113006

出　　处：《计算机仿真》2008年第11期278-281,共4页Computer Simulation

基　　金：国家自然科学基金(10402008)

摘　　要：针对系统时变与非时变参数对系统变量的影响问题,建立了四分之一车辆系统动力学模型,借助Matlab交互式高级编程语言编写函数文件实现算法,建立了路面激励仿真模型与悬架仿真模型;并以此为基础,利用灵敏度分析方法,采用一阶标准灵敏度函数形式,通过四分之一车体模型实例计算,分析在路面激励下,车身速度、车身位移与车轮位移的标准灵敏度响应,分析系统结构参数的改变对结构动态特性变化的敏感程度,提高了设计效率并减少了设计成本。Aimed at the effect of variable coefficients and the constant coefficients on the system, a quarter - car two degree of freedom suspension vibration model is established, with the aid of matlab interactive senior programmable language. The algorithm is gained through function file, and the simulation model of the road noise and the suspen- sion system is obtained. Moreover, the one order standard sensitivity function is adopted, the actual model of one quarter - car two degree of freedom suspension system is designed, and the standard sensitivity response of vehicle body velocity, body displacement and the tire displacement is analyzed, the sensitive degree of the change of the structure dynamic characteristics variation is studied. The results indicate that the method can improve the design efficiency and reduce the cost of the design.

关 键 词：灵敏度 车辆模型 仿真分析 

分 类 号：U461.4[机械工程—车辆工程]