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GUI for Understanding Nyquist Plots

4.5 | 2 ratings Rate this file 8 Downloads (last 30 days) File Size: 20 KB File ID: #33248 Version: 1.0
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GUI for Understanding Nyquist Plots


Erik (view profile)


This is a GUI designed to help learn about Nyquist plots.

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This program is a GUI that starts with a transfer function, and then displays the evolution of the Nyquist plot, including excursions around poles on the jw axis. It shows the path in "s" and in "G(s)H(s)" including places where the plots go to infinity (this is missing from Matlab's "nyquist" command, and can cause confusion).

When the plot is done, an explanation is given about why the system is shown to be stable or unstable.

The program is meant to me a learning tool, not a general tool for making Nyquist plots (Matlab's "nyquist" command already does that well).

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As it stands the commenting is poor, but if you have problems, please contact me (

Required Products Control System Toolbox
MATLAB release MATLAB 7.12 (R2011a)
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Comments and Ratings (2)
29 May 2016 Scotland

26 Nov 2014 Xiaochen

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