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1、汽車運(yùn)用工程44050104周青云1.31)繪制驅(qū)動(dòng)力與行駛阻力平衡圖利用Matlab畫圖，具體語句如下：n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.844;r=0.367;ig1=5.56;ua=0.377*r*n/(ig1*io);Ft1=Ttq*ig1*io*t/r;plot(ua,Ft1)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/100
2、0-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.844;r=0.367;ig2=2.769;ua=0.377*r*n/(ig2*io);Ft2=Ttq*ig2*io*t/r;plot(ua,Ft2)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.844;r=0.367;ig3=1.
3、644;ua=0.377*r*n/(ig3*io);Ft3=Ttq*ig3*io*t/r;plot(ua,Ft3)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.844;r=0.367;ig4=1.00;ua=0.377*r*n/(ig4*io);Ft4=Ttq*ig4*io*t/r;plot(ua,Ft4)holdon;n=600:1:4000;Ttq=-19.313+2
4、95.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.844;r=0.367;ig5=0.793;ua=0.377*r*n/(ig5*io);Ft5=Ttq*ig5*io*t/r;plot(ua,Ft5)汽車運(yùn)用工程44050104周青云holdon;m=3880;f=0.012;g=9.8;CdA=2.77;u=0:1:120;Ff=m*g*f;Fw=CdA*u.^2/21.15;Fr=Ff+Fw;Ft5=Ttq*ig5*io*t/r;Ff=
5、m*g*f;Fw=CdA*u.^2/21.15;Fr=Ff+Fw;plot(u,Fr)運(yùn)行生成圖像如下:2）求汽車最高車速,最大爬坡度及克服該坡度時(shí)相應(yīng)的附著率當(dāng)Ft=Ff+Fw時(shí),汽車處于穩(wěn)定狀態(tài),并達(dá)到最高車速由圖可知Ｕmax=101km/h最大爬坡度及附著率：一檔時(shí)有最大爬坡度,由驅(qū)動(dòng)力與阻力圖當(dāng)ua=8.037km/h時(shí):GsinFt-(Ff+Fw)最大?？芍篎t=13058N,Fr=316,F=Ft-Fr=12742N.由:Gsinα=F可得：α=19.2°.i=tanα=0.348貨車為后輪驅(qū)動(dòng)C2=i/(a/L+hg*i/L)其中L=3
6、.2m,a=1.947m,hg=0.9m.汽車運(yùn)用工程44050104周青云解得C2=0.49273）繪制加速度倒數(shù)曲線：利用Matlab畫圖，具體語句如下：n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;i0=5.83;t=0.844;r=0.367;ig1=5.56;Iw1=1.798;Iw2=3.598;If=0.218;m=3880;r=0.367;g=9.8;f=0.012;CdA=2.77;ua=0
7、.377*r*n/(ig1*io);Ft1=Ttq*ig1*io*t/r;dert=1+(Iw1+Iw2)/(m*r.^2)+If*ig1.^2*i0.^2*t/(m*r.^2);Ff=m*g*f;Fw1=CdA*ua.^2/21.15;Fr1=Ff+Fw1;a1=(dert*m)./(Ft1-Fr1);plot(ua,a1)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.874*(n/1000).^3-3.8445*(n/1000).^4;io=5.83;t=0.
8、844;r=0.367;ig2=2.769;Iw1=1.798;Iw2=3.598;If=0.
