4X4汽车动力学建模分析研究  

Research the Nonlinear Dynamic Model of the 4X4 Vehicle

作　　者：陈轶杰[1] 郑冠慧[1] 鞠海洁[1] 郭建娟[1] 韩小玲[1] 

机构地区：[1]中国北方车辆研究所,北京100072

出　　处：《控制工程期刊（中英文版）》2013年第3期206-212,共7页Scientific Journal of Control Engineering

基　　金：受北京市科技新星计划支持资助（20108090）.

摘　　要：开展了4X4整车动力学建模研究，运用拉格朗日定理推导并整理出质量、阻尼和刚度矩阵，通过对微分方程组进行傅立叶变换得出了模型的传递函数。针对车辆随机激励的路面输入进行了分析，考虑了4轮车辆中各轮路面激励的相干性，给出了相干函数，推导了普遍的四轮车辆输入功率谱矩阵，为开展仿真分析奠定了基础。提出了车辆悬架系统的性能评价体系，并完成了频域解析式推导，最后通过编程计算仿真分析了不同路面时频域的响应谱，给出了在不同路况和车速下车体所受的振动加速度随阻尼比的变化规律，为开展零部件设计提供了理论依据。The nonlinear dynamic modeling of 4X4 vehicle was researched in this article, the mass, damping and stiffness matrices were deduced through the lagrange theorem. On the other, the model transfer function was got by fourier transform of differential equations. The random excitation coherence function of 4 wheels and the power spectrum matrix were researched for the model simulation. The performance evaluation system of vehicle suspension system was derived, and the regular of vibration acceleration of the vehicle body in different road conditions and vehicle speeds by damping ratio were given, it provides theoretical basis for the design of components

关 键 词：车辆动力学 随机激励 功率谱密度 振动加速度 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]