Finding the zeros for a state space model is easy. Just convert the SS to TF and then find the roots of numerators from the transfer function.
But it's can be done this way too:
$$C\operatorname{adj}(sI-A)B +D\det(sI-A) = 0$$
My question is if there is an algorithm to solve this in MATLAB? I Know that there is a MATLAB command named zero and tzero. But I don't want to use that.
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$\begingroup$Here is the answer
Z = eig ([A B; C D] , [eye (size (A, 1)) B*0; C*0 D*0])
Z = Z(Z ~= 0 & isfinite(Z))% remove inf values Done.
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