View source for Talk:Nyquist plot

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{{Merged-to|Nyquist stability criterion|19 February 2018}}

== The dreaded cleanup ==
G'day, I placed the cleanup tag on this article because it is so close to being polished it seems to be a shame to leave it even just a little bit imperfect. I random articled here and read through with great interest because it is my field of work. A few things to fix up are:
*(perhaps) the order of the paragraphs 
*the flow of the article(It reads as a series of sentances/ideas strung together)
*Add a diagram of the Nyquist plot
Please understand that it is because I think the article is good that I want to "clean it up" so no one else will ever have cause to again. It was fluke that I made it here tonight, so we'll continue on Monday?
[[User:Flehmen|Flehmen]] [[user_talk:Flehmen|<sup>Work with me</sup>]] 01:25, 27 August 2005 (UTC)


==Need image==
{{Mathematical diagram requested}}

:: Done (as well as for [[Nichols plot]]). [[User:Engelec|Engelec]] 19:06, 9 November 2006 (UTC)

:: Should probably include more than one.  Explain that this one shows an instability while this other one does not, etc. — [[User:Omegatron|Omegatron]] 23:47, 26 March 2007 (UTC)
:::*I second the motion. Please offer pictures of a 'good' and a 'bad' case.  
:::*This article seems to cry out for a few more sentences of explanation. If this isn't possible, could a link be added to a complete description of how to use a Nyquist plot?  It would be OK to presuppose some knowledge of complex variables. [[User:EdJohnston|EdJohnston]] 16:07, 29 March 2007 (UTC)

== Is Nyquist plot the same as Cole-Cole? ==

I think they are and the article should mention Cole-Cole.
[[User:Physicsjock|Physicsjock]] ([[User talk:Physicsjock|talk]]) 23:21, 23 June 2009 (UTC)

:No, they are different projections of the same data, according to http://www.nonmet.mat.ethz.ch/education/courses/ceramic2/EIS.ppt  A mention (and comparison) in this article might still be useful though.  <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/142.150.147.133|142.150.147.133]] ([[User talk:142.150.147.133|talk]]) 14:23, 20 June 2011 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->
::I think they are two words for the same thing and found several sources that say that; here is one: https://electrochemistryresources.com/tag/impedance-data. Here is another one: https://www.hioki.com/global/learning/electricity/nyquist.html. That link of yours doesn't work, by the way. Do you have another source for the claim that they are different? [[User:Johncolton|Johncolton]] ([[User talk:Johncolton|talk]]) 19:38, 27 September 2022 (UTC)

== Method for creating Nyquist plot ==

A similar problem to other articles in controls, the article currently explains what the Nyquist plot is capable of but does not demonstrate how to (1) create the Nyquist plot or (2) actually do the analysis; thereby, making the article a nice abstract, but not a helpful page for those wanting to learn about Nyquist plots.  The analysis is covered in "Nyquist stability criterion" but the creation of the plot is nowhere to be found. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/139.121.201.254|139.121.201.254]] ([[User talk:139.121.201.254|talk]]) 19:58, 14 March 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

== loop gain? ==

"Nyquist plot of the open-loop system"

This is the [[loop gain]], right? — [[User:Omegatron|Omegatron]]&nbsp;([[User talk:Omegatron|talk]]) 03:53, 29 July 2015 (UTC)

== Merge with Nyquist stability criterion ==

Merge with [[Nyquist stability criterion]] has been suggested via a hatnote in 2016. I think this is a good idea. Concretely, it seems to make sense to merge this article into the other, since it is only instrumental for the criterion. Are there any objections? &mdash; [[User:SebastianHelm|Sebastian]] 14:31, 17 January 2018 (UTC)
:'''Support'''; merge to Nyquist stability criterion seems like the correct direction too; even if the plot can be used for other purposes, it is clear that the primary purpose is to check for stability. [[User:Klbrain|Klbrain]] ([[User talk:Klbrain|talk]]) 13:51, 24 January 2018 (UTC)
::{{done}} [[User:Klbrain|Klbrain]] ([[User talk:Klbrain|talk]]) 21:52, 19 February 2018 (UTC)