zero output continuously in closed loop
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Hi I am getting zero output continuously in closed loop in the following simlink model. I gave step inputs of magnitude 1 at t=1 sec. The matlab function code is:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/158453/image.png)
function [q_v_dot, q4_dot,w_bi_dot] = sc_dyn(q_v,q4,w_bi,tau)
I=[0.0027 0 0;0 0.0107 0;0 0 0.0101];
w_bi_dot = inv(I)*(tau - Smtrx(w_bi)*(I*w_bi));
q_v_dot =(1/2)*(q4*eye(3)+Smtrx(q_v))*w_bi;
q4_dot = -(1/2)*q_v'*w_bi;
end
function S=Smtrx(i)
S = [0 -i(3) i(2);i(3) 0 -i(1);-i(2) i(1) 0];
end
Please let me know why I am getting zero, even if I give step input?
Regards
valli
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