全时四轮驱动车动力分配比的分析及仿真  

Analysis and simulation on force distribution ratio of AWD vehicle

作　　者：戚烈[1] 吕新民[1] 王立星[1] 

机构地区：[1]西北农林科技大学机电学院,杨凌712100

出　　处：《机械设计与制造》2011年第8期181-183,共3页Machinery Design & Manufacture

基　　金：陕西省科技攻关项目(2003K03-G9-01)

摘　　要：建立了全时四轮驱动车在直线行驶和转弯时的力学模型,通过汽车行驶受力图分析了直线和转弯时的运动性能,主要包括在不同动力分配比下的直线加速、爬坡和转弯性能,计算了每种工况下的最佳动力分配。然后使用相平面法判断车辆的稳定性,对在不同转向角时的侧偏和横摆的收敛性进行分析,并且通过建立约束方程,找到在一定车速和一定转角时的驱动力范围。最后在ADAMS中建立了汽车模型,并将计算结果进行仿真和理论结果相比得出最优动力分配比。A simple dynamic model on all wheels drive vehicle is established.The motion performance of all wheels drive vehicle in straight line and turning is analyzed,including linear acceleration,hill climbing performance and turning performance under different force distributing ratio.Then the optimal power distribution for each working condition is calculated.By using phase-plane method the stability of vehicle is judged and the convergences of the yaw velocity and side slip angle following the change of steering angle and velocity is analyzed.Through constraint equations the driving force range in a certain speed and a certain angle is found.At last,a car model is built in ADAMS to obtain the optimal force distribution ratio by comparing the simulation with theoretical results.

关 键 词：全时四轮驱动车 动力分配 优化匹配 

分 类 号：TH16[机械工程—机械制造及自动化] U469[机械工程—车辆工程]