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1、1.31)繪制驅(qū)動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).A2+40.874*(n/1000).A3-3.8445*(n/2000)44;io=5.83;t=0.844;r=0.367;igl=5.56;ua=0.377*r*n/(igl*io);Ftl=Ttq*igl*io*t/r;plot(ua,Ftl)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/
2、1000-165.44*(n/1000).A2+40.874*(n/1000).A3-3.8445*(n/1000).八4;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).A2+40.874*(n/1000).A3-3.8445*(nA000).A4;io=5.83
3、;t=0.844;r=0.367;ig3=1.644;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).A2+40.874*(n/1000).A3-3.8445*(n/1000).A4;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;p
4、lot(ua,Ft4)holdon;n=600:1:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).A2+40.874*(n/1000).A3-3.8445*(n/1000).A4;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)holdon;m=3880;f=0.012;g=9.8;CdA=2.77;u=0:l:120;Ff=m*g*f;F
5、w=CdA*u.A2/21.15;Fr=Ff+Fw;Ft5=Ttq*ig5*io*t/r;Ff=m*g*f;Fw=CdA*u.A2/21.15;Fr=Ff+Fw;plot(u,Fr)運行生成圖像如下:2)求汽車最高車速,最大爬坡度及克服該坡度時相應(yīng)的附著率當(dāng)Ft二Ff+Fw時,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:一檔時有最大爬坡度,由驅(qū)動力與阻力圖當(dāng)ua=8.037km/h時:Gsina=Ft?(Ff+Fw)最大。可知:rh:Ft=13058N,Fr=316,F=
6、Ft-Fr=12742N.Gsina=FPl得:a=19.2°.i=tana=0.348貨車為后輪驅(qū)動其中C2=i/(a/L+hg*i/L)L=3.2m,a=1.947m,hg=0.9m.解得C2=0?49273)繪制加速度倒數(shù)曲線:利JIJMatlab畫圖,具體語句如下:n=600:l:4000;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).A2+40.874*(n/1000)43?3.8445*(n/1000)44;i0=5.83;t=0.844;r=0.367;igl
7、=5.56;lwl=1.798;lw2=3.598;lf=0.218;m=3880;r=0.367;g=9.8;f=0.012;CdA=2.77;ua=0.377*r*n/(igl*io);Ftl=Ttq*igl*io*t/r;dert=l+(lwl+lw2)/(m*r.A2)+lf*igl.A2*iO.A2*t/(m*r.A2);Ff=m*g*f;Fwl=CdA*ua.A^Z21.15;Frl=Ff+Fwl;al=(dert*m)./(Ftl-Frl);plot(ua,al)holdon;n=600:l:40
8、00;Ttq=-19.313+295.27*n/1000-165.44*(n/1000).A2+40.874*(n/1000).人3-3.8445*(n/1000)44;io=5.83;t=0.844;r=0.367;ig2=2.769;lwl=1.798;lw2=3.598;lf=0.218;m=3880;r=0.367;g=9.8;f=0.012;CdA=2.77;ua=0.377