Hi all,

First, congratulations for the wonderful work you've done by maintaining and creating the library!

I have found some issues working with DTLTI systems. More specifically, I am trying to simulate the step response of a DT system directly from its state-space representation. This realization is computed directly in the DT domain, without a sampling process. As you can see in the image below, there is a problem since the step response is blowing up. My intuition is that there is a bug since the DT system is being treated as if it were CT, but it is DT.

Exactly the same happens when the dt parameter is set to None. When I try to evaluate whether the SS representation is DT or CT, I get that it's being taken as both.

I would appreciate any guidelines on how to fix this. I can do it myself and pull it :)

Kind regards,

Sergio Dorado-Rojas