tiange 发表于 2007-11-22 14:56

请教Riccati方程的解为何总是出错

syms x12 x11 x22 x21 k11 k12 k13 k14 k21 k22 k23 k24;
L=1.8;
a1=1.875/1.8;
a2=4.964/1.875;
Ka=0.0002646;
A=;
b112=sin(a1*x12)-sinh(a1*x12)+(sin(a1*L)+sinh(a1*L))*(cosh(a1*x12)-cos(a1*x12))/(cos(a1*L)+cosh(a1*L));
b111=sin(a1*x11)-sinh(a1*x11)+(sin(a1*L)+sinh(a1*L))*(cosh(a1*x11)-cos(a1*x11))/(cos(a1*L)+cosh(a1*L));
B11=b112-b111;
b122=sin(a1*x22)-sinh(a1*x22)+(sin(a1*L)+sinh(a1*L))*(cosh(a1*x22)-cos(a1*x22))/(cos(a1*L)+cosh(a1*L));
b121=sin(a1*x21)-sinh(a1*x21)+(sin(a1*L)+sinh(a1*L))*(cosh(a1*x21)-cos(a1*x21))/(cos(a1*L)+cosh(a1*L));
B12=b122-b121;
b212=sin(a2*x12)-sinh(a2*x12)+(sin(a2*L)+sinh(a2*L))*(cosh(a2*x12)-cos(a2*x12))/(cos(a2*L)+cosh(a2*L));
b211=sin(a2*x11)-sinh(a2*x11)+(sin(a2*L)+sinh(a2*L))*(cosh(a2*x11)-cos(a2*x11))/(cos(a2*L)+cosh(a2*L));
B21=b212-b211;
b222=sin(a2*x22)-sinh(a2*x22)+(sin(a2*L)+sinh(a2*L))*(cosh(a2*x22)-cos(a2*x22))/(cos(a2*L)+cosh(a2*L));
b221=sin(a2*x21)-sinh(a2*x21)+(sin(a2*L)+sinh(a2*L))*(cosh(a2*x21)-cos(a2*x21))/(cos(a2*L)+cosh(a2*L));
B22=b222-b221;
B=Ka*;
K=;
AA=A-B*K;
BB=;
R=;
Q=;
=care(AA,BB,Q,R)

[ 本帖最后由 eight 于 2007-11-22 16:31 编辑 ]

eight 发表于 2007-11-22 16:31

请先耐心看看置顶帖《聚宝盆》，然后重新整理你的问题

[ 本帖最后由 ChaChing 于 2010-6-14 00:47 编辑 ]
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