Hi Luis,
You need to use UnitStep[t]
, not UnitStep
y1 = OutputResponse[TransferFunctionModel[sys1, s], UnitStep[t], {t, 0, 5}]
Plot[y1, {t, 0, 5}]
I think you need to increase the range of t
to see anything interesting.
y1 = OutputResponse[TransferFunctionModel[sys1, s], UnitStep[t], {t, 0, 10000}]
Plot[y1, {t, 0, 10000}]
![enter image description here](https://community.wolfram.com//c/portal/getImageAttachment?filename=10439plot.png&userId=1398218)