汽车滑行阻力系数的测定方法研究  

Research on the Method to Determine Vehicle Coasting Resistance Coefficient

作　　者：朱卫东[1] 刘学琼[1] 田勇[1] 

机构地区：[1]东风汽车有限公司

出　　处：《汽车技术》2010年第6期40-42,共3页Automobile Technology

摘　　要：根据软件matlab的符号微分方程解法求出汽车滑行运动方程,将一定范围内的由滚动阻力系数和风阻系数计算出的滑行曲线和采样滑行曲线进行比较,找出了最能拟合采样滑行曲线的参数,该方法不需给定阻力系数的初始值就能找到各阻力系数的大小,阻力系数的精度由步长确定。通过计算实例表明,根据阻力系数计算的滑行数据与采样数据曲线重合,验证了拟合结果的正确性。Vehicle coasting motion equation is solved with matlab symbolic differential equation, the coasting curve calculated with rolling resistance coefficient and air drag coefficient is compared with sampling coasting curve, then the parameter which most fits the sampling coasting curve is found. With this method, the value of resistance coefficients can be found without the initial value of given resistance coefficient, with the accuracy of resistance coefficient is determined by step length. The example of calculation indicates that the coasting data calculated according to resistance coefficient is identical with the sampling data curve, proving credibility of the fitting result.

关 键 词：汽车 滑行 阻力系数 平均偏差 

分 类 号：U461.1[机械工程—车辆工程]