Timeline for Pade Approximation of dead time
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 14, 2018 at 2:35 | comment | added | Tendero | There's something that is not clear to me. Sorry if this question is kind of silly. But given for example the transfer function $H(s)=s^2/(s+1)$, one can find a ROC such that the system is both causal and stable. However, the transfer function is improper. As far as I understand from your comment in my answer above, this is not possible. So where am I making the mistake? | |
| Mar 13, 2018 at 19:50 | comment | added | Matt L. | @Tendero: Yes (to your first question). Examples of causal and unstable, or non-causal and stable systems are easy to find: just put a pole in the right half-plane and you'll have a causal unstable system or a non-causal stable system, e.g. $H(s)=1/(s-1)$ | |
| Mar 13, 2018 at 14:10 | comment | added | Tendero | This system is unstable for both causal and noncausal cased, right? That impulse would appear no matter what. Are there any examples where a system can be either causal and unstable OR noncausal and stable, depending on the ROC? | |
| Jan 16, 2018 at 13:49 | history | answered | Matt L. | CC BY-SA 3.0 |