Matlab程序代码
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作汽车驱动力——行驶阻力平衡图并确定车辆最高车速及爬坡度
将数据点导入Matlab，并执行以下命令：
[Ft 为相应各挡位的驱动力；Ua 为相应各挡位的速度；f 为阻力曲线；]
// x=0:0.02:240;
f=150.92*(1+x.^2/19400)+0.030*x.^2;
Ua1=[11.4,15.2,19.0,22.8,26.6,30.4,34.2,38.0,41.8,45.6]
Ft1=[4855,5355,5826,6283,5998,5998,5998,6083,5842,5712]
p1=polyfit(Ua1,Ft1,2);
y1=polyval(p1,Ua1,2);
Ua2=[19.2,25.6,32.0,38.4,44.8,51.2,57.6,64.0,70.4,76.8]
Ft2=[2898,3196,3477,3750,3580,3580,3580,3630,3486,3409]
p2=polyfit(Ua2,Ft2,2);
y2=polyval(p2,Ua2);
Ua3=[28.8,38.4,48.0,57.6,67.2,76.8,86.4,96.0,105.6,115.2]
Ft3=[1931,2130,2317,2499,2385,2385,2385,2419,2323,2271]
p3=polyfit(Ua3,Ft3,2);
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