Nyquist Plot Using MATLAB

Drawing the nyquist plot is very simple using MATLAB. Consider the following transfer function for our example:

eq11

First define the transfer function:

  1. Define the numerator
  2. Define the denominator
  3. Define the transfer function as num/den

Then use the “nyquist” command to have MATLAB draw the nyquist plot.

nyquist-matlab

 

nyquist-matlab2