This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

NicholsGridLines

NicholsGridLines
is an option to NicholsPlot that specifies contours of constant magnitude and constant phase of the closed-loop system.
  • The following settings can be given:
Noneno contours drawn
Automaticcontours chosen automatically
{magnitude,phase}contours specified by magnitude and phase are drawn
  • The magnitude values are the absolute values.
  • The phase values are in radians.
  • The following settings can be given for magnitude and phase:
Noneno contours drawn
Automaticcontours chosen automatically
{c1,c2,...}draw the contours
{{c1,style1,r1},...}contours with specified styles and regions
  • The default style of a magnitude contour is Dashed, and the default style of a phase contour is Dotted.
  • The setting specifies that a point should be included if yields True.
Show the closed-loop magnitude and phase contours:
Show the closed-loop magnitude and phase contours:
In[1]:=
Click for copyable input
Out[1]=
Choose contours automatically:
Show specific magnitude and phase contours:
Use different contour styles:
Specify different regions:
Magnitude contours with specific dB values:
Specify contours with phase from -70 to 70 degrees in increments of 5:
The contours depend on the type of feedback:
A discrete-time system:
Estimate closed-loop magnitude and phase values at various frequencies:
New in 8