differential equation 2DOF
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function homework2 = main2(t,X1,X2)
global m1 c1 k1 m2 c2 k2
M=[m1 0;0 m2];
C=[c1+c2 -c2; -c2 c2];
K=[k1+k2 -k2; -k2 k2];
F=[3*cos(t);10*cos(3*t)];
X=[X1;X2];
homework2=M*X(3)+C*X(2)+K*X(1)-F;
end
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tspan= 0:0.1:50 ;
X0 = [0 0;0 0] ;
[t, X] = ode45(@main2, tspan, X0);
plot(X1,X2)
I do it here and it 's ain't working....
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