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求助,编写的矩阵微分方程组,然后在运行的时候报错:错误使用 + 矩阵维度必须一致。之后我将式子中求导的项去掉了,然后仍然要求维度必须一致,请问这该如何解决。程序如下:
" y6 X9 j& F/ I. n# ?. Dopt=odeset;opt.RelTol=1e-8;* C c/ h" E# N. W* S; X7 g) F
Tmh=0;Tmp=0;Mh=4100;Ihx=4032;Ihy=3461;Ihz=4980;Ihxy=31;Ihxz=637;Ihyz=26;Mp=1500;Ipx=117;Ipy=861;
7 W* A: m) k v0 e9 u' ~Ipz=754;Ipxy=0.615;Ipxz=152;Ipyz=14.5;
' i @: L' z( t, Fg=9.81;xh=0.237;yh=0.013;zh=0.404;xp=0.5;yp=0;zp=0;xhp=0;yhp=0;zhp=0.96;xch=0;ych=0;zch=0.9;u=12*sin((pi/3)*t);
" I$ c1 U `& l3 T9 [! L. X# sv=0;w=12*sin((pi/3)*t);2 |# [. n& D/ g/ Z: \$ q
p=12*sin((pi/3)*t);q=12*sin((pi/3)*t);r=12*sin((pi/3)*t);theta=12*sin((pi/3)*t);varphi=12*sin((pi/3)*t);Ch=100;Cp=90;Kp=100;$ S/ r# A$ S& f. H( b. I' R3 V6 e
A=p*cos(x(1))*cos(x(2))+q*sin(x(1))*cos(x(2))-r*sin(x(2));, X, {, C' h! k, t ^- m
B=p*cos(x(1))*sin(x(2))+q*sin(x(1))*sin(x(2))+r*cos(x(2)); N" X& R+ b, h) [
E=-p*sin(x(1))+q*cos(x(1));- Y( v ? W, B7 B' U# s
F=p*cos(x(1))+q*sin(x(1));& R: \: ?3 p3 i2 V. ^* ^8 A
e=-diff(p)*sin(x(1))+diff(q)*cos(x(1));
- K; F" n, N+ h% `2 h2 If=diff(p)*cos(x(1))+diff(q)*sin(x(1));
, g0 S/ ~" a: o& rTcwh=Mh.*xh.*(v+xch.*r-zch.*p+xh.*r-zh.*f)+Mh.*yh.*(u-r.*ych+q.*zch-r.*yh+zh.*e)+....( {6 g2 v$ [- _
Mh.*zh.*F.*(u-r.*ych+q.*zch-r.*yh+zh.*E)+Mh.*zh.*E.*(v+r.*xch-p.*zch+r.*xh-zh.*F)-Mh.*xh.*F.*(w-q.*xch+p.*ych-E.*xh+yh.*F)...& U; ?: v9 g. P
-Mh.*yh.*E.*(w-q.*xch+p.*ych-E.*xh+yh.*F)...& e" _' d: H. \7 N/ d) D
+Mp.*((diff(u)-diff(r).*ych+diff(q).*zch-diff(r).*yhp+zhp.*e).*(-yhp-cos(x(2)).*yp)+(diff(v)+xch.*diff(r)-zch.*diff(p)+...' S% v7 x0 q3 {; h
xhp.*diff(r)-zhp.*f+b.*xp-a.*zp).*(xhp+xp.*cos(x(2))+sin(x(2)).*zp)+(diff(w)-diff(q).*xch+diff(p).*ych-e.*xhp+yhp.*f-xp.*e+...5 K. s; Y- C7 }& Q$ l5 d7 c7 b
yp^2.*sin(x(2)).*a)-((u-r.*ych+q.*zch-r.*yhp+zhp.*E-yp.*B+zp.*E).*(-(zhp+zp).*F-yp.*sin(x(2)).*E)+(v+r.*xch-p.*zch+r.*xhp-zhp.*F+...
& ~/ \4 d5 `( }6 ] xp.*B-zp.*A).*(-zhp.*E+xp.*sin(x(2)).*E-zp.*cos(x(2)).*E)+(w-q.*xch+p.*ych-E.*xhp+yhp.*F-xp.*E+yp.*A)*(xhp*F+yhp*E+xp*F+yp*cos(x(2))*E)))...
# _; U& x/ d6 U* x5 h) r +Ihxz*f+Ihyz*e+Ihz*diff(r)-Ihx*E*F+Ihy*E*F+Ihxy*F^2+Ihxy*E^2-Ihxz*r*E+Ihyz*r*F-Ipx*sin(x(2))*a+Ipz*cos(x(2))*b-...* X! j. O4 X8 u# C
Ipxy*sin(x(2))*e-Ipxz*sin(x(2))^2*f+Ipxz*cos(x(2))*a+Ipyz*cos(x(2))*e-Ipx*cos(x(2))*E*A+Ipy*E*F-Ipz*A*E*sin(x(2))-...
* {, j- c( o- n( V6 v" i Ipxy*cos(x(2))*E^2+Ipxy*A*F-Ipxz*cos(x(2))*B*E-Ipxz*sin(x(2))*A*E+Ipyz*B*F-Ipyz*sin(x(2))*E^2;, F" C3 b8 e9 f4 v1 I: c
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