用matlab绘制汽车的行驶加速度曲线.docx

1、用matlab绘制汽车的行驶加速度曲线n=600:10:4000;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000)2+40.874*(n/1000).A3-3.8445 *(n/1000)/4;m=3880;g=9.8;nmin=600;nmax=4000;G=m*g;ig=5.56 2.769 1.644 1.00 0.793;nT=0.85;r=0.367; f=0.013;CDA=2.77;i0=5.83;L=3.2;a=1.947;hg=0.9;If=0.218;Iw1=1.798;Iw2=3.598;Ft1=Tq*ig(1)*i0*nT/r;Ft2

2、Tq*ig(2)*i0*nT/r;Ft3=Tq*ig(3)*i0*nT/r;Ft4=Tq*ig(4)*i0*nT/r;Ft5=Tq*ig(5)*i0*nT/r;ua1=0.377*r*n/ig(1)/i0;ua2=0.377*r*n/ig(2)/i0;ua3=0.377*r*n/ig(3)/i0;ua4=0.377*r*n/ig(4)/i0;ua5=0.377*r*n/ig(5)/i0;Fw1=CDA*ua1/2/21.15;Fw2=CDA*ua2/2/21.15;Fw3=CDA*ua3/2/21.15;Fw4=CDA*ua4.A2/21.15;Fw5=CDA*ua5.A2/21.15;Ff

3、G*f;deta1=1+(Iw1+Iw2)/(m*rA2)+(If*ig(1)A2*i0A2*nT)/(m*rA2);deta2=1+(Iw1+Iw2)/(m*rA2)+(If*ig(2)A2*i0A2*nT)/(m*rA2);deta3=1+(Iw1+Iw2)/(m*rA2)+(If*ig(3)A2*i0A2*nT)/(m*rA2);deta4=1+(Iw1+Iw2)/(m*rA2)+(If*ig(4)A2*i0A2*nT)/(m*rA2);deta5=1+(Iw1+Iw2)/(m*rA2)+(If*ig(5)A2*i0A2*nT)/(m*rA2); a1=(Ft1-Ff-Fw1)/(deta1*m);a2=(Ft2-Ff-Fw2)/(deta2*m);a3=(Ft3-Ff-Fw3)/(deta3*m);a4=(Ft4-Ff-Fw4)/(deta4*m);a5=(Ft5-Ff-Fw5)/(deta5*m); plot(ua1,a1,ua2,a2,ua3,a3,ua4,a4,ua5,a5);t i t le ( 汽车的行驶加速度曲线 ) ;xlabel(ua/(km*hA-1);ylabel(a/m*s-2); gtext(n),gtext(d),gtext(o),gtext(6),gtext(o);