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1、不同转速下的燃油消耗率与扭矩的曲线拟合clear allbe1=222.8,220.4,232.4,228.5,227.8,232.6,248.5,245.9,272.4,329.7;Ttq1=399.8,354.1,318.5,278.1,236.2,203.6,185.3,157.2,117.2,80.8;T1=80:320/9:400;%转换矩阵格式Be1=interp1(Ttq1,be1,T1,spline);%n=1400r/min时燃油消耗率与扭矩的曲线拟合be2=222.0,221.7,235.4,226.5,230.5,236.8,249.1,276.1,407.9,487.0。

2、;Ttq2=409.1,365.7,328.3,284.1,243.7,203.2,164.3,123.9,83.5,39.7;T2=39:371/9:410;Be2=interp1(Ttq2,be2,T2,spline);be3=226.0,225.3,226.4,233.9,242.1,283.3,253.9,271.4,323.5,468.6;Ttq3=408.3,368.3,328.3,289.0,244.4,208.8,167.7,132.1,89.5,46.1;T3=46:363/9:409;Be3=interp1(Ttq3,be3,T3,spline);be4=206.5,231。

3、.1,231.1,233.0,242.0,244.9,265.0,299.8,398.0,596.8;Ttq4=425.6,380.3,332.7,290.9,244.4,205.1,160.2,114.5,68.8,30.7;T4=30:396/9:426;Be4=interp1(Ttq4,be4,T4,spline);be5=234.7,259.8,235.5,237.6,242.8,292.3,277.9,308.7,396.2,605.9;Ttq5=420.7,379.6,334.6,291.6,244.4,202.8,157.5,116.0,74.1,37.8;T5=37:384/9。

4、:421;Be5=interp1(Ttq5,be5,T5,spline);be6=174.2,242.2,252.1,287.4,253.6,263.6,290.6,316.8,378.0,518.8;Ttq6=404.6,360.5,322.7,283.0,243.3,205.5,162.1,124.7,86.8,52.4;T6=52:353/9:405;Be6=interp1(Ttq6,be6,T6,spline);be7=256.9,253.7,253.5,260.0,303.8,280.7,300.6,346.6,435.6,812.9;Ttq7=378.0,344.7,310.3,2。

5、64.3,226.1,186.8,154.2,115.3,76.3,34.1;T7=34:344/9:378;Be7=interp1(Ttq7,be7,T7,spline);be8=257.9,295.3,282.4,288.7,301.9,329.7,357.0,475.4,580.3,1080.1;Ttq8=315.6,275.5,242.5,210.3,178.5,145.6,118.6,72.6,52.8,22.4;T8=22:294/9:316;Be8=interp1(Ttq8,be8,T8,spline);B=Be1;Be2;Be3;Be4;Be5;Be6;Be7;Be8;N=14。

6、00*ones(10,1);1600*ones(10,1);1800*ones(10,1);2000*ones(10,1);2200*ones(10,1);2400*ones(10,1);2600*ones(10,1);2800*ones(10,1);Ttqn=T1;T2;T3;T4;T5;T6;T7;T8;G=ones(80,1),N,Ttqn,N.2,N.*Ttqn,Ttqn.2;A=GB;%A为6*1矩阵n,Ttq=meshgrid(1400:2800,100:600);%生成n-Ttq平面上的自变量“格点”矩阵be=A(1)+n.*A(2)+Ttq*A(3)+n.2*A(4)+n.*T。

7、tq*A(5)+Ttq.2*A(6);Pe=Ttq.*n/9550;%外特性实验数据拟合Nw=1403,1597,1797,1986,2102,2199,2303,2400,2507,2598,2700,2802;Ttqw=474,497,515,526,528.8,522.8,509.5,492.2,471.2,448.4,408.3,357.4;n0=1400:2800;Ttqw_N=interp1(Nw,Ttqw,n0,spline);h=repmat(Ttqw_N,501,1);ii=find(Ttqh);%确定超出边界的“格点”下标be(ii)=NaN;%强制为非数Pe(ii)=Na。

8、N;%强制为非数%绘制等燃油消耗率曲线和等功率曲线三维拟合图subplot(1,2,1);mesh(n,Ttq,be);hold on;mesh(n,Ttq,Pe);axis(1000,3000,100,600,0,500);hold on;xlabel(n(r/min)ylabel(Ttq(N*m)zlabel(Pe(KW) be(g/(KW*h)title(等燃油消耗曲线和等功率曲线的三维拟合图)%绘制边界线(外特性曲线)subplot(1,2,2);plot(n0,Ttqw_N,LineWidth,2);axis(1400,2800,100,550);xlabel(n(r/min);ylabel(Ttq(N*m);title(万有特性曲线);hold on;%绘制等油耗率曲线的二维图B=contour(n,Ttq,be,11);%画等位线，并给出标识数据clabel(B);%把“等位值”沿等位线随机标识hold on;%绘制等功率曲线的二维图P=contour(n,Ttq,Pe,11);%画等位线，并给出标识数据clabel(P);%把“等位值”沿等位线随机标识legend(等油耗曲线,等功率曲线,外特性曲线)hold off(注：文档可能无法思考全面，请浏览后下载，供参考。可复制、编制，期待你的好评与关注。