Talk:Control Systems/Realizations

Realization Conditions
Why is a system G(s) realizable if and only if the degree of the denominator is greater than or equal to the degree of the numerator? Fragapanagos (discuss • contribs) 19:09, 13 January 2015 (UTC)
 * A system with a numerator of higher degree than the denominator is not physically admissible; it is a non-causal system. This said, I do not think that statement is accurate. In order to be realized in this specific form, the system has also to be controllable.MaskedAce (discuss • contribs) 19:05, 6 June 2017 (UTC)

Error in C Matrix
As far as I know, it should be $$ C = [N_1 \; N_2 \; \cdots \;  N_r] $$. In addition, the boxed text should read "p is the number of inputs, q that of outputs and r is the order of the model (number of states)". MaskedAce (discuss • contribs) 19:05, 6 June 2017 (UTC)