Comparing controllers using Bode plot I know that Bode plot is used when determining the stability of the open loop system. But is it possible to compare controllers using Bode plot? In my example I have a process $1/Ls$ and a PI controller $ K_p + K_i/s $. If I change $K_p$ and $K_i$ I get the following picture. !Open loop PI controller + process From that I can conclude that the system is stable since phase does not cross -180°. Can I make any other conclusions about the process and/or controller's dynamic behavior (settling time, oscillations, etc.) by looking only at magnitude or phase plots

* Settling time, in general no (only for 2nd order).
* Oscillations, in general no.



From bode plots for open-loop systems you can determine the stability, phase margin and gain margin see

You can also determine the modulus margin by using the sensitivity function) of the system which is $1/(1 + L(s))$ with $L(s) = G(s)*C(s)$, $G(s)$ the plant, $C(s)$ the controller