汽车理论课后习题Matlab程序详解

1、ÉÂÎ÷Àí¹¤Ñ§ÔºÑî·É»ª1. / 341.3 È·¶¨Ò»ÇáÐÍ»õ³µµÄ¶¯Á¦ÐÔÄÜ£¨»õ³µ&

2、#191;É×°ÓÃ4µ²»ò5µ²±äËÙÆ÷£¬ÈÎÑ¡ÆäÖеÄÒ»ÖÖ½øÐÐÕû³µÐÔÄܼÆËã

3、;£©£º1£©»æÖÆÆû³µÇý¶¯Á¦ÓëÐÐÊ»×èÁ¦Æ½ºâͼ¡£2£©ÇóÆû³µ×î¸

4、23;³µËÙ£¬×î´óÅÀƶȼ°¿Ë·þ¸ÃƶÈʱÏàÓ¦µÄ¸½×ÅÂÊ¡£3£©»æÖ&#

5、198;Æû³µÐÐÊ»¼ÓËٶȵ¹ÊýÇúÏߣ¬ÓÃͼ½â»ý·Ö·¨ÇóÆû³µÓÃ2µµÆð²&

6、#189;¼ÓËÙÐÐÊ»ÖÁ70km/hµÄ³µËÙ£­Ê±¼äÇúÏߣ¬»òÕßÓüÆËã»úÇóÆû³µÓÃ2

7、µµÆð²½¼ÓËÙÐÐÊ»ÖÁ70km/hµÄ¼ÓËÙʱ¼ä¡£ÇáÐÍ»õ³µµÄÓйØÊý¾Ý£ºÆ

8、ûÓÍ·¢¶¯»úʹÓÃÍâÌØÐÔµÄTq-nÇúÏßµÄÄâºÏ¹«Ê½Îª 23419.313295.27()165.44()40.874()3.8445()1000100010001000qnnnnT=?+?+?

9、2;½ÖУ¬TqΪ·¢¶¯»úת¾Ø£¨N?m£©nΪ·¢¶¯»úתËÙ£¨r/min£©¡£ ·¢¶¯»úµÄ

10、5;îµÍתËÙnmin=600r/min,×î¸ßתËÙnmax=4000r/min¡£ ×°ÔØÖÊÁ¿ 2000kg Õû³µÕû±¸ÖÊÁ¿ 1800kg ×ÜÖÊÁ&

11、#191; 3880kg ³µÂְ뾶 0.367m ´«¶¯Ïµ»úеЧÂÊ ¦Çt=0.85 ¹ö¶¯×èÁ¦ÏµÊý f=0.013 ¿ÕÆø×èÁ

12、6;ϵÊý¡ÁÓ­·çÃæ»ý CDA=2.77m2 Ö÷¼õËÙÆ÷´«¶¯±È i0=5.83 ·ÉÂÖת¶¯¹ßÁ¿ If=0.218kg?m2 ¶þÇ

13、6;ÂÖת¶¯¹ßÁ¿ Iw1=1.798kg?m2 ËĺóÂÖת¶¯¹ßÁ¿ Iw2=3.598kg?m2 ±äËÙÆ÷´«¶¯±È ig(Êý¾ÝÈçÏ

14、4;±í)¢ñµµ ¢òµµ ¢óµµ ¢ôµµ ¢õµµ Ëĵµ±äËÙÆ÷ 6.09 3.09 1.71 1.00 - Îåµµ±äËÙÆ÷ 5.56 2.769 1.644

15、 1.00 0.793 Öá¾à L=3.2m ÖÊÐÄÖÁÇ°Öá¾àÀ루ÂúÔØ£© a=1.974m ÖÊÐĸߣ¨ÂúÔØ£© hg=0.9m½â£

16、6;Matlab³ÌÐò£º (1) ÇóÆû³µÇý¶¯Á¦ÓëÐÐÊ»×èÁ¦Æ½ºâͼºÍÆû³µ×î¸ß³µËÙ

17、;³ÌÐò£º n=600:10:4000;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000).2+40.874*(n/1000).3-3.8445*(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*

18、ig(1)*i0*nT/r;Ft2=Tq*ig(2)*i0*nT/r;Ft3=Tq*ig(3)*i0*nT/r;2. / 34Ft4=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;ua=0:5:120;Ff=G*f;Fw=CDA*ua.2/21.15;Fz=Ff+Fw;plot(ua1,Ft1,ua2,Ft2,ua3,Ft3,ua4,Ft

19、4,ua5,Ft5,ua,Fz);title('Çý¶¯Á¦-ÐÐÊ»×èÁ¦Æ½ºâͼ');xlabel('ua(km/s)');ylabel('Ft(N)');gtext('Ft1'),gtext('Ft2'),gtext('Ft3'),gtext('Ft4'),gtext(

20、9;Ft5'),gtext('Ff+Fw');zoom on;x,y=ginput(1);zoom off;disp('Æû³µ×î¸ß³µËÙ=');disp(x);disp('km/h');Æû³µ×î¸ß³µËÙ=99.3006km/h3. / 34(2)ÇóÆ

21、51;³µ×î´óÅÀƶȳÌÐò£ºn=600:10:4000;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000).2+40.874*(n/1000).3-3.8445*(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;C

22、DA=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;ua1=0.377*r*n/ig(1)/i0;Ff=G*f;Fw1=CDA*ua1.2/21.15;Fz1=Ff+Fw1;Fi1=Ft1-Fz1;Zoom on;imax=100*tan(asin(max(Fi1/G);disp('Æû³µ×î´óÅÀƶÈ=');d

23、isp(imax);disp('%');Æû³µ×î´óÅÀƶÈ=35.2197%(3)Çó×î´óÅÀƶÈÏàÓ¦µÄ¸½×ÅÂʺÍÇóÆ&#

24、251;³µÐÐÊ»¼ÓËٶȵ¹ÊýÇúÏß³ÌÐò£ºclearn=600:10:4000;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000).2+40.874*(n/1000).3-3.8445*(n/1000).4;m=3880;g=9.8;nmin=600;nmax=4000;G=m*g;ig

25、=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=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.

26、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;4. / 34Fw4=CDA*ua4.2/21.15;Fw5=CDA*ua5.2/21.15;Ff=G*f;deta1=1+(Iw1+Iw2)/(m*r2)+(If*ig(1)2*i02*nT)/(m*r2);deta2=1+(Iw1+Iw2)/(m*r2)+(If*ig(2)2*i02*nT)/(m*r2);deta3=1+(Iw1+Iw2)/(m*r2)+(If*ig(3)2*i02*nT)/

27、(m*r2);deta4=1+(Iw1+Iw2)/(m*r2)+(If*ig(4)2*i02*nT)/(m*r2);deta5=1+(Iw1+Iw2)/(m*r2)+(If*ig(5)2*i02*nT)/(m*r2);a1=(Ft1-Ff-Fw1)/(deta1*m);ad1=1./a1;a2=(Ft2-Ff-Fw2)/(deta2*m);ad2=1./a2;a3=(Ft3-Ff-Fw3)/(deta3*m);ad3=1./a3;a4=(Ft4-Ff-Fw4)/(deta4*m);ad4=1./a4;a5=(Ft5-Ff-Fw5)/(deta5*m);ad5=1./a5;plot(ua1,ad

28、1,ua2,ad2,ua3,ad3,ua4,ad4,ua5,ad5);axis(0 99 0 10);title('Æû³µµÄ¼ÓËٶȵ¹ÊýÇúÏß');xlabel('ua(km/h)');ylabel('1/a');gtext('1/a1');gtext('1/a2');gtext('1/a3

29、9;);gtext('1/a4');gtext('1/a5');a=max(a1);af=asin(max(Ft1-Ff-Fw1)/G);C=tan(af)/(a/L+hg*tan(af)/L);disp('¼ÙÉèºóÂÖÇý¶¯£¬×î´óÅÀƶÈÏàÓ¦µ&#

30、196;¸½×ÅÂÊ=');disp(C);¼ÙÉèºóÂÖÇý¶¯£¬×î´óÅÀƶÈÏàÓ¦µÄ¸½×ÅÂÊ=0.42195. / 34(4) >>cl

31、earnT=0.85;r=0.367;f=0.013;CDA=2.77;i0=5.83;If=0.218;Iw1=1.798;Iw2=3.598;L=3.2;a=1.947;hg=0.9;m=3880;g=9.8;G=m*g; ig=5.56 2.769 1.644 1.00 0.793;nmin=600;nmax=4000;u1=0.377*r*nmin./ig/i0;u2=0.377*r*nmax./ig/i0;deta=0*ig;for i=1:5deta(i)=1+(Iw1+Iw2)/(m*r2)+(If*(ig(i)2*i02*nT)/(m*r2);endua=6:0.01:99;N

32、=length(ua);n=0;Tq=0;Ft=0;inv_a=0*ua;delta=0*ua;Ff=G*f;Fw=CDA*ua.2/21.15;for i=1:Nk=i;if ua(i)<=u2(2)n=ua(i)*(ig(2)*i0/r)/0.377;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000)2+40.874*(n/1000)3-3.8445*(n/1000)4;Ft=Tq*ig(2)*i0*nT/r;inv_a(i)=(deta(2)*m)/(Ft-Ff-Fw(i);delta(i)=0.01*inv_a(i)/3.6;elseif ua(

33、i)<=u2(3)n=ua(i)*(ig(3)*i0/r)/0.377;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000)2+40.874*(n/1000)3-3.8445*(n/1000)4;Ft=Tq*ig(3)*i0*nT/r;inv_a(i)=(deta(3)*m)/(Ft-Ff-Fw(i);delta(i)=0.01*inv_a(i)/3.6;elseif ua(i)<=u2(4)n=ua(i)*(ig(4)*i0/r)/0.377;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000)2+40.874*(n

34、/1000)3-3.8445*(n/1000)4;Ft=Tq*ig(4)*i0*nT/r;inv_a(i)=(deta(4)*m)/(Ft-Ff-Fw(i);delta(i)=0.01*inv_a(i)/3.6;elsen=ua(i)*(ig(5)*i0/r)/0.377;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000)2+40.874*(n/1000)3-3.8445*(n/100Î人Àí¹¤´óѧ6. / 340)4;Ft=Tq*

35、ig(5)*i0*nT/r;inv_a(i)=(deta(5)*m)/(Ft-Ff-Fw(i);delta(i)=0.01*inv_a(i)/3.6;enda=delta(1:k);t(i)=sum(a);endplot(t,ua);axis(0 80 0 100);title('Æû³µ2µµÔ­µØÆð²½»»µ²¼ÓËÙʱ¼

36、8;ÇúÏß');xlabel('ʱ¼ät£¨s£©');ylabel('ËÙ¶Èua£¨km/h£©');>> ginputans =25.8223 70.073725.7467 70.0737ËùÒÔÆû³µ2µµÔ­&#

37、181;ØÆð²½»»µ²¼ÓËÙÐÐÊ»ÖÁ70km/hµÄ¼ÓËÙʱ¼äԼΪ25.8s7. 7ÒÑÖª»õ³µ×°ÓÃÆû

38、;ÓÍ·¢¶¯»úµÄ¸ººÉÌØÐÔÓëÍòÓÐÌØÐÔ¡£¸ººÉÌØÐÔÇúÏßµÄÄâºÏ¹«

39、;ʽΪ£º44332210eeeePBPBPBPBBb+=ÆäÖУ¬bΪȼÓÍÏûºÄÂÊg/(kW?h)£»PeΪ·¢¶¯»ú¾»¹¦ÂÊ£¨kW£

40、9;£»ÄâºÏʽÖеÄϵÊýËæתËÙn±ä»¯¡£µ¡ËÙÓͺÄsmLQid/299.0=£¨µ¡ËÙתËÙ400r/min

41、£©¡£ Î人Àí¹¤´óѧ8. / 34¼ÆËãÓë»æÖÆÌâ1.3Öлõ³µµÄ1£©Æû³µ¹¦ÂÊƽ

42、ºâͼ¡£2£©×î¸ßµµÓë´Î¸ßµµµÄµÈËٰٹ«ÀïÓͺÄÇúÏß¡£»òÀûÓÃ

43、;¼ÆËã»úÇó»õ³µ°´JB3352-83¹æ¶¨µÄÁù¹¤¿öÑ­»·ÐÐÊ»µÄ°Ù¹«ÀïÓͺġ£&#

44、188;ÆËãÖÐÈ·¶¨È¼ÓÍÏûºÄÖµbʱ£¬Èô·¢¶¯»úתËÙÓ븺ºÉÌØÐÔÖиø&

45、#182;¨µÄתËÙ²»ÏàµÈ£¬¿ÉÓÉÏàÁÚתËÙµÄÁ½¸ùÇúÏßÓòåÖµ·¨ÇóµÃ&

46、#161;£½â£ºMatlab³ÌÐò£º(1) Æû³µ¹¦ÂÊƽºâͼ³ÌÐò£ºclearn=600:10:4000;Tq=-19.313+295.27*(n/1000)-165.44*(n/1000).2+40.874*(n/1000).3-3.8445*(n/1000).4

47、;m=3880;g=9.8;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;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;Pe1=Tq.*ig(1)*i0.*ua1./(3600*r);Pe2=Tq.*ig(

48、2)*i0.*ua2./(3600*r);Pe3=Tq.*ig(3)*i0.*ua3./(3600*r);Pe4=Tq.*ig(4)*i0.*ua4./(3600*r);Pe5=Tq.*ig(5)*i0.*ua5./(3600*r);ua=0:0.35:119;Ff=G*f;Fw=CDA*ua.2/21.15;Pf=Ff*ua/3600;Pw=Fw.*ua/3600;Pe0=(Pf+Pw)./nT;Pe=max(Pe1);plot(ua1,Pe1,ua2,Pe2,ua3,Pe3,ua4,Pe4,ua5,Pe5,ua,Pe0,ua,Pe);axis(0 119 0 100);title('

49、;Æû³µ¹¦ÂÊƽºâͼ');xlabel('ua(km/h)');ylabel('Pe(kw)');gtext('1'),gtext('2'),gtext('3'),gtext('4'),gtext('5'),gtext('(Pf+Pw)/et'),gtext('Pe');9. / 34£

50、¨2£©×î¸ßµµÓë´Î¸ßµµµÄµÈËٰٹ«ÀïÓͺÄÇúÏß³ÌÐò£ºclearn=600:1:4000;m=3880;g=9.8;G=m*g;ig=5

51、.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;n0=815 1207 1614 2012 2603 3006 3403 3804;B00=1326.8 1354.7 1284.4 1122.9 1141.0 1051.2 1233.9 1129.7;B10=-416.46 -303.98 -189.75 -121.59 -98.893 -73.714 -84.478 -45.291;B20=72.379 3

52、6.657 14.524 7.0035 4.4763 2.8593 2.9788 0.71113;B30=-5.8629 -2.0553 -0.51184 -0.18517 -0.091077 -0.05138 -0.047449- 0.00075215;B40=0.17768 0.043072 0.0068164 0.0018555 0.00068906 0.000350320.00028230 -0.000038568;B0=spline(n0,B00,n);B1=spline(n0,B10,n);B2=spline(n0,B20,n);B3=spline(n0,B30,n);B4=spl

53、ine(n0,B40,n);Ff=G*f;ua4=0.377*r*n/ig(4)/i0;ua5=0.377*r*n/ig(5)/i0;9 / 34Fz4=Ff+CDA*(ua4.2)/21.15;Fz5=Ff+CDA*(ua5.2)/21.15;Pe4=Fz4.*ua4./(nT*3.6*1000);Pe5=Fz5.*ua5./(nT*3.6*1000);for i=1:1:3401b4(i)=B0(i)+B1(i)*Pe4(i)+B2(i)*Pe4(i).2+B3(i)*Pe4(i).3+B4(i)*Pe4(i).4;b5(i)=B0(i)+B1(i)*Pe5(i)+B2(i)*Pe5(i)

54、.2+B3(i)*Pe5(i).3+B4(i)*Pe5(i).4;endpg=7.0;Q4=Pe4.*b4./(1.02.*ua4.*pg);Q5=Pe5.*b5./(1.02.*ua5.*pg);plot(ua4,Q4,ua5,Q5);axis(0 100 10 30);title('×î¸ßµµÓë´Î¸ßµµµÈËٰٹ«ÀïÓ&#

55、205;ºÄÇúÏß');xlabel('ua(km/h)');ylabel('°Ù¹«ÀïÓͺģ¨L/100km£©');gtext('4'),gtext('5');3.1¸Ä±ä1.3ÌâÖÐÇáÐÍ

56、»õ³µµÄÖ÷¼õËÙÆ÷´«¶¯±È£¬×ö³ö0iΪ5.17¡¢5.43¡¢5.83¡¢6.17¡¢6.33ʱµÄȼÓ;­&#

57、188;ÃÐÔ¡ª¼ÓËÙʱ¼äÇúÏߣ¬ÌÖÂÛ²»Í¬0iÖµ¶ÔÆû³µÐÔÄܵÄÓ°Ïì¡£ Îä

58、;ººÀí¹¤´óѧ10 / 34½â£ºMatlab³ÌÐò£ºÖ÷³ÌÐò£ºi0=5.17,5.43,5.83,6.17,6.33; %ÊäÈëÖ÷´«¶¯±ÈµÄ

59、2;ý¾Ýfor i=1:1:5y(i)=jiasushijian(i0(i); %Çó¼ÓËÙʱ¼äendy;for i=1:1:5b(i)=youhao(i0(i); %Çó¶ÔÓ¦i0µÄÁù¹¤¿ö°Ù¹«ÀïÓͺÄe

60、ndb;plot(b,y,'+r')hold onb1=linspace(b(1),b(5),100);y1=spline(b,y,b1); %Èý´ÎÑùÌõ²åÖµplot(b1,y1); %»æÖÆȼÓ;­¼ÃÐÔ-¼ÓËÙʱ¼ä&

61、#199;úÏßtitle('ȼÓ;­¼ÃÐÔ¡ª¼ÓËÙʱ¼äÇúÏß');xlabel('°Ù¹«ÀïÓͺÄ(L/100km)');ylabel('¼Ó

62、03;Ùʱ¼äs');gtext('i0=5.17'),gtext('i0=5.43'),gtext('i0=5.83'),gtext('i0=6.17'),gtext('i0=6.33');×Ó³ÌÐò£º(1) function y=jiasushijian(i0) %Çó¼ÓËÙʱ¼

63、;äµÄ´¦Àíº¯Êýn1=linspace(0,5000); %ÏÈÇó¸÷¸öµµÎ»µÄÇý¶¯Á¦nmax=4000;nmin=600;r=0.367;yita=0.85;CDA=2.77;f=0.013;G=(3880)*9.8;ig=6.09,3.09,1.71,1.00;%

64、i0=5.83for i=1:1:4 %iΪµµÊýuamax(i)=chesu(nmax,r,ig(i),i0); %¼ÆËã¸÷¸öµµÎ»µÄ×î´óËÙ¶ÈÓë×îСËÙ¶Èuamin(i)=chesu(nm

65、in,r,ig(i),i0);ua(i,:)=linspace(uamin(i),uamax(i),100);n(i,:)=zhuansu(ua(i,:),r,ig(i),i0); %¼ÆËã¸÷¸öµµÎ»µÄתËÙ·¶Î§Ttq(i,:)=zhuanju(n(i,:); %Çó³ö¸÷µµ&#

66、206;»µÄת¾Ø·¶Î§Ft(i,:)=qudongli(Ttq(i,:),ig(i),i0,yita,r); %Çó³öÇý¶¯Á¦F(i,:)=f*G+CDA*(ua(i,:).2)/21.15; %Çó³ö¹ö¶¯×èÁ¦ºÍ¿

67、ÕÆø×èÁ¦µÄºÍdelta(i,:)=1+(1.798+3.598+0.218*(ig(i)2)*(i02)*yita)/(3880*r2); %Çóת¶¯ÖÊÁ¿»»ËãϵÊýa(i,:)=1./(delta(i,:).*3880./(Ft(i,:)-F(i,:); %Çó&#

68、179;ö¼ÓËÙ¶ÈF2(i,:)=Ft(i,:)-F(i,:);end%ÏÂÃæ·Ö¸÷¸öµµÎ»½øÐлý·Ö£¬Çó³ö¼ÓËÙʱ¼ätemp1(1,:)=

69、ua(2,:)/3.6;11 / 34temp1(2,:)=1./a(2,:);n1=1;for j1=1:1:100if ua(3,j1)>max(ua(2,:)&&ua(3,j1)<=70temp2(1,n1)=ua(3,j1)/3.6;temp2(2,n1)=1./a(3,j1);n1=n1+1;endendn2=1;for j1=1:1:100if ua(4,j1)>max(ua(3,:)&&ua(4,j1)<=70;temp3(1,n2)=ua(4,j1)/3.6;temp3(2,n2)=1./a(4,j1);n2=n2+1;e

70、ndendy=temp1(1,1)*temp1(2,1)+qiuji(temp1(1,:),temp1(2,:)+qiuji(temp2(1,:),temp2(2,:)+qiuji(temp3(1,:),temp3(2,:);end(2) function ua=chesu(n,r,ig,i0); %ÓÉתËÙ¼ÆËã³µËÙua=0.377*r.*n/(ig*i0);(3) function n=zhuansu(ua,r,ig,i0); %Ç

71、óתËÙn=ig*i0.*ua./(0.377*r);end(4) function y=zhuanju(n); %Çóת¾Øº¯Êýy=-19.313+295.27.*(n./1000)-165.44.*(n./1000).2+40.874.*(n./1000).3-3.8445.*(n./1000).4;(5) function y=qudongli(Ttq,ig,i0,yita,r); %ÇóÇý

72、¶¯Á¦º¯Êýy=(ig*i0*yita.*Ttq)/r;end(6) function p=qiuji(x0,y0) %Çó»ý·Öº¯Êýn0=size(x0);n=n0(2);x=linspace(x0(1),x0(n),200) ;y=spline(x0,y0,x); %²åÖµ% figure;plot(x,y);p=trapz(x,y) ;end12 / 34(7

73、) %Çó²»Í¬i0ϵÄÁù¹¤¿öÓͺÄfunction b=youhao(i0);global f G CDA yita m r If Iw1 Iw2 pg B0 B1 B2 B3 B4 n %ÉùÃ÷È«¾Ö±äÁ¿ig=6.09,3.09,1.71,1.00;r=

74、0.367;yita=0.85;CDA=2.77;f=0.013;%i0=5.83;G=(3880)*9.8;If=0.218;Iw1=1.798;Iw2=3.598;m=3880; %Æû³µµÄ»ù±¾²ÎÊýÉ趨n0=815 1207 1614 2012 2603 3006 3403 3804;B00=1326.8 1354.7 1284.4 1122.9 1141.0 1051.2 1233.9 1129

75、.7;B10=-416.46 -303.98 -189.75 -121.59 -98.893 -73.714 -84.478 -45.291;B20=72.379 36.657 14.524 7.0035 4.4763 2.8593 2.9788 0.71113;B30=-5.8629 -2.0553 -0.51184 -0.18517 -0.091077 -0.05138 -0.047449- 0.00075215;B40=0.17768 0.043072 0.0068164 0.0018555 0.00068906 0.00035032 0.00028230- 0.000038568;n=

76、600:1:4000;B0=spline(n0,B00,n);B1=spline(n0,B10,n);B2=spline(n0,B20,n); %ʹÓÃÈý´ÎÑùÌõ²åÖµ£¬±£Ö¤ÇúÏߵĹ⻬Á¬ÐøB3=spline(n

77、0,B30,n);B4=spline(n0,B40,n);ua4=0.377*r.*n./(i0*ig(4); %Çó³ö·¢¶¯»úתËÙ·¶Î§ÄÚ¶ÔÓ¦µÄIII¡¢IVµµ³µËÙF4=f*G+CDA*(ua4.2)/21.15; %Ç&

78、#243;³ö¹ö¶¯×èÁ¦ºÍ¿ÕÆø×èÁ¦µÄºÍP_fw4=F4.*ua4./(yita*3.6*1000); %Çó³ö×èÁ¦¹¦ÂÊfor i=1:1:3401 %ÓÃÄâº

79、Ϲ«Ê½Çó³ö¸÷¸öȼÓÍÏûºÄÂÊb4(i)=B0(i)+B1(i)*P_fw4(i)+B2(i)*(P_fw4(i)2+B3(i)*(P_fw4(i)3+B4(i)*(P_fw4(i)4;endpg=7.06; %ÆûÓ͵ÄÖضÈÈ¡

80、;7.06N/Lua4_m=25,40,50; %ÔÈËٽ׶εijµËÙs_m=50,250,250; %ÿ¶ÎÔÈËÙ×ß¹ýµÄ¾àÀëb4_m=spline(ua4,b4,ua4_m); %²åÖµµÃ&#

81、179;ö¶ÔÓ¦ËٶȵÄȼÓÍÏûºÄÂÊF4_m=f*G+CDA*(ua4_m.2)/21.15; %³µËÙ¶ÔÓ¦µÄ×èÁ¦P_fw4_m=F4_m.*ua4_m./(yita*3.6*1000); %·¢

82、2;¯»ú¹¦ÂÊQ4_m=P_fw4_m.*b4_m.*s_m./(102.*ua4_m.*pg) ;Q4_a1=jiasu(40,25,ig(4),0.25,ua4,i0);Q4_a2=jiasu(50,40,ig(4),0.2,ua4,i0);Qid=0.299;tid=19.3;s=1075;Q_i=Qid*tid; %Çó³ö¼õËٽ׶εÄȼ

83、1;ÍÏûºÄÁ¿Q4all=(sum(Q4_m)+Q4_a1+Q4_a2+Q_i)*100/s; %IVµµÁù¹¤¿ö°Ù¹«ÀïȼÓÍÏûºÄÁ¿b=Q4all;(8)¼ÓËٽ׶δ

84、66;Àíº¯Êý13 / 34function q=jiasu(umax,umin,ig,a,ua0,i0);global f G CDA yita m r If Iw1 Iw2 pg B0 B1 B2 B3 B4 n; %i0 ;ua1=umin:1:umax; %°ÑËٶȷ¶Î§ÒÔ1km/hΪ¼ä¸ô½øÐ

85、8;»®·Ödelta=1+(Iw1+Iw2)/(m*r2)+(If*ig2*i02*yita)/(m*r2);P0=(G*f.*ua0./3600+CDA.*ua0.3/76140+(delta*m.*ua0/3600)*a)/yita;P=(G*f.*ua1/3600+CDA.*ua1.3/76140+(delta*m.*ua1/3600)*a)/yita;dt=1/(3.6*a) ; %ËÙ¶ÈÿÔö¼Ó1km/hËùÐ

86、;èÒªµÄʱ¼äfor i=1:1:3401 %ÖØÐÂÀûÓÃÄâºÏ¹«Ê½Çó³öbÓëuaµÄ¹Øϵb0(i)=B0(i)+B1(i)*P0(i)+B2(i)*(P0(i)2+B3(i)*(P0(i)3+B4(i)*

87、(P0(i)4;endb1=interp1(ua0,b0,ua1); %²åÖµ³ö¸÷¸öËٶȽڵãµÄȼÓÍÏûºÄÂÊQt=P.*b1./(367.1.*pg); %Çó³ö¸÷¸öËÙ

88、¶È½ÚµãµÄȼÓÍÏûºÄÂÊi1=size(Qt);i=i1(2);Qt1=Qt(2:i-1);q=(Qt(1)+Qt(i)*dt./2+sum(Qt1)*dt; %Çó¸Ã¼ÓËٽ׶εÄȼÓÍÏû

89、86;ÄÁ¿4.34.34.34.3Ò»ÖÐÐÍ»õ³µ×°ÓÐÇ°ºóÖƶ¯Æ÷·Ö¿ªµÄË«¹Ü·Öƶ¯Ïµ£¬

90、98;äÓйزÎÊýÈçÏ£ºÔØºÉ ÖÊÁ¿£¨kg£© ÖÊÐĸßhg/m Öá¾àL/mÖÊÐÄÖÁÇ°Öá

91、90;àÀëa/mÖƶ¯Á¦·ÖÅäϵÊý¦Â¿ÕÔØ 4080 0.845 3.950 2.100 0.38ÂúÔØ 9290 1.170 3.950 2.950 0.381£© ¼ÆËã²¢»æÖÆ&#

92、192;ûÓø½×ÅϵÊýÇúÏߺÍÖƶ¯Ð§ÂÊÇúÏß2£© ÇóÐÐÊ»³µËÙUa£½30km/h£¬ÔÚ?

93、63;½0.80·ÃæÉϳµÂÖ²»±§ËÀµÄÖƶ¯¾àÀë¡£¼ÆËãʱȡÖÆÎ人Àí¹¤´ó

94、;ѧ14 / 34 ¶¯Ïµ·´Ó¦Ê±¼ä'2¦Ó£½0.02s£¬Öƶ¯¼õËÙ¶ÈÉÏÉýʱ¼ä''2¦Ó£½0.02s¡£

95、3£© ÇóÖƶ¯ÏµÇ°²¿¹Ü·Ëð»µÊ±Æû³µµÄÖƶ¯¾àÀës£¬Öƶ¯Ïµºó²

96、91;¹Ü·Ëð»µÊ±Æû³µµÄÖƶ¯¾àÀë's¡£½â£ºMatlab³ÌÐò£º(1) ÇóÀûÓø½×ÅÏ

97、;µÊýÇúÏߺÍÖƶ¯Ð§ÂÊÇúÏß³ÌÐò£º clear k=4080;hgk=0.845;Lk=3.950;ak=2.10;betak=0.38;bk=Lk-ak;%¿ÕÔØʱµÄ²ÎÊýmm=

98、9290;hgm=1.170;Lm=3.950;am=2.950;betam=0.38;bm=Lm-am;%ÂúÔØʱµÄ²ÎÊýz=0:0.01:1.0;figure(1);fai=z;fai_fk=betak*z*Lk./(bk+z*hgk);%¿ÕÔØʱǰÖáµÄ¦Õffai_fm=betam*z*Lm./(bm+z*hgm)

99、;%ÂúÔØʱǰÖáµÄ¦Õffai_rk=(1-betak)*z*Lk./(ak-z*hgk);%¿ÕÔØʱºóÖáµÄ¦Õrfai_rm=(1-betam)*z*Lm./(am-z*hgm);%ÂúÔØʱºóÖ

100、5;µÄ¦Õrplot(z,fai_fk,'b-',z,fai_fm,'r',z,fai_rk,'b-',z,fai_rm,'r',z,fai,'k');title('ÀûÓø½×ÅϵÊýÓëÖƶ¯Ç¿¶ÈµÄ¹&#

101、216;ϵÇúÏß');xlabel('Öƶ¯Ç¿¶È(z/g)');ylabel('ÀûÓø½×ÅϵÊý¦Õ');gtext('¦Õr(¿ÕÔØ)'),gtext('¦

102、3;r(ÂúÔØ)'),gtext('¦Õ=z'),gtext('¦Õf(¿ÕÔØ)'),gtext('¦Õf(ÂúÔØ)');figure(2);Efk=z./fai_fk*100;%¿ÕÔØʱǰÖáµÄÖƶ

103、;¯Ð§ÂÊEfm=z./fai_fm*100;Erk=z./fai_rk*100;Erm=z./fai_rm*100;plot(fai_fk,Efk,'b',fai_fm,Efm,'r',fai_rk,Erk,'b',fai_rm,Erm,'r');axis(0 1 0 100);title('Ç°.ºóÖƶ¯Ð§ÂÊÇúÏ

104、;ß');xlabel('¸½×ÅϵÊý¦Õ');ylabel('Öƶ¯Ð§ÂÊ%');gtext('Ef'),gtext('Er'),gtext('Er'),gtext('ÂúÔØ'),gtext('¿ÕÔØ&#

105、39;); Î人Àí¹¤´óѧ15 / 34(2)ÎʺÍ(3)ÎʳÌÐò£ºclearmk=4080;hgk=0.845;Lk=3.950;ak=2.10;betak=0.38;bk=Lk-ak;%¿ÕÔØʱµÄÎ人

106、2;í¹¤´óѧ16 / 34²ÎÊýmm=9290;hgm=1.170;Lm=3.950;am=2.950;betam=0.38;bm=Lm-am;%ÂúÔØʱµÄ²ÎÊýz=0:0.01:1;fai_fk=betak*z*Lk./(bk+z*hgk);%¿ÕÔØʱǰÖ

107、áµÄ¦Õffai_fm=betam*z*Lm./(bm+z*hgm);%ÂúÔØʱǰÖáµÄ¦Õffai_rk=(1-betak)*z*Lk./(ak-z*hgk);%¿ÕÔØʱºóÖáµÄ¦Õrfai_rm=(1-betam)*z*Lm./(am-z*hgm)

108、;%ÂúÔØʱºóÖáµÄ¦ÕrEfk=z./fai_fk*100;%¿ÕÔØʱǰÖáµÄÖƶ¯Ð§ÂÊEfm=z./fai_fm*100;Erk=z./fai_rk*100;Erm=z./fai_rm*100;t1=0.02;t2=0.02;ua0=

109、30;fai=0.80;g=9.8;ak1=Erk(81)*g*fai/100;am1=Erm(81)*g*fai/100;Sk1=(t1+t2/2)*ua0/3.6+ua02/(25.92*ak1);%Öƶ¯¾àÀëSm1=(t1+t2/2)*ua0/3.6+ua02/(25.92*am1);disp('¿ÕÔØʱ£¬Æû³µÖƶ¯¾

110、;àÀëSk1=');disp(Sk1);disp('ÂúÔØʱ£¬Æû³µÖƶ¯¾àÀëSm1=');disp(Sm1);ak2=fai*g*ak/(Lk+fai*hgk);am2=fai*g*am/(Lm+fai*hgm);ak3=fai*g*bk/(Lk-fai*hgk);am3=fai*g*bm/(Lk-fai*hgm);Sk2=(

111、t1+t2/2)*ua0/3.6+ua02/(25.92*ak2);%Öƶ¯¾àÀëSm2=(t1+t2/2)*ua0/3.6+ua02/(25.92*am2);Sk3=(t1+t2/2)*ua0/3.6+ua02/(25.92*ak3);Sm3=(t1+t2/2)*ua0/3.6+ua02/(25.92*am3);disp('¿ÕÔØʱ£¬Ç°Öƶ¯Æ

112、÷Ë𻵣¬Æû³µÖƶ¯¾àÀëSk2=');disp(Sk2);disp('ÂúÔØʱ£¬Ç°Öƶ¯Æ÷Ë𻵣¬Æû³µ

113、;Öƶ¯¾àÀëSm2=');disp(Sm2);disp('¿ÕÔØʱ£¬ºóÖƶ¯Æ÷Ë𻵣¬Æû³µÖƶ¯¾àÀëSk3=');disp(

114、Sk3);disp('ÂúÔØʱ£¬ºóÖƶ¯Æ÷Ë𻵣¬Æû³µÖƶ¯¾àÀëSm3=');disp(Sm3);¿ÕÔØʱ£¬Æû

115、³µÖƶ¯¾àÀëSk1=7.8668ÂúÔØʱ£¬Æû³µÖƶ¯¾àÀëSm1=5.6354Î人Àí¹¤´óѧ17 / 34¿ÕÔØʱ£¬Ç°Öƶ¯Æ÷Ë𻵣¬Æû³µÖƶ¯¾àÀëSk2=10.0061ÂúÔØʱ&#