It would be nice to have the capability to specify a forbidden region and have that show up on the Nichols chart, but that doesn’t currently exist. If you (or someone else) would like to add it, that would be great.
-richard
> On 28 Jan 2020, at 10:57 , Patrick Dubus via python-control-discuss <pyt...@li...> wrote:
>
> Hello,
>
> I would like to know if you have foreseen to better identify the forbidden area into the black-Nichols chart as show into the attached file (bold line with closed loop gain at +2.3dB).
> ALternatively, do you know how to proceed ?
>
> Thanks for your help and for this very interesting module.
>
> Patrick.
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