多轴非线性轮胎车辆操纵稳定性分析  

Analysis on Control Stability of Multi-Axle and Nonlinear-Tire Vehicles

作　　者：陈建凯[1] 丁宏刚 张小江[1] 高秀华[1] 

机构地区：[1]吉林大学机械科学与工程学院 [2]徐州重型机械有限公司

出　　处：《工程机械》2011年第4期27-30,50,共5页Construction Machinery and Equipment

基　　金：江苏省科技成果转化专项项目(BA2007038)

摘　　要：建立多轴转向车辆的二自由度非线性轮胎的整车动力学方程,分析多轴车辆转向性能评价参数与车速的关系。分析结果表明:多轴转向车辆的行驶稳定性主要取决于车身质心的位置、轴的分布、轴的质量及轮胎的侧偏刚度等因素。采用非线性轮胎模型对整车机械转向进行仿真分析,比线性轮胎模型更接近实际车辆的运动情况。仿真结果表明:车身的横摆角速度、质心偏离角、侧向加速度都随车速的提高而不断增大。全轮转向比前轮转向和前三轴转向的转向半径小,车辆具有更好的通过性。但随着车速的提高,全轮转向的车辆易出现甩尾现象,会降低车辆的行驶稳定性。This is to formulate a binary dynamic equation for the complete vehicle using binary non-linear tires to steer with multi axles,and to analyze the relationship of evaluation data for steering performance of a multi-axle vehicle as with data of the vehicle speed.The analysis results show that travel stability of the multi-axle steering vehicle depends mainly on factors which include gravity center position of the car-body,axle distribution,mass of the axle,and side-ward decline rigidity of the tire.Findings tell that simulation analysis on the whole vehicle steering function with non-linear tire model is closer to actual travel condition of such a vehicle than that with linear tire model.Results from the simulation show that angular velocity in lateral oscillation,deflection angle off mass center,and slip acceleration can continuously increase along with vehicle speed increases.All-wheel steering has shorter turning radius than steering with front wheels or with 3 front axle wheels that the former has better trafficability for the vehicle itself.However,the vehicle with all-wheel steering tends to perform a 'tail throwing' that would decrease travel stability of the vehicle.

关 键 词：多轴转向 非线性 横摆角速度 侧偏角 质心偏离角 侧向加速度 

分 类 号：U461.6[机械工程—车辆工程]