Nichols Chart

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Nichols Chart

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The Nichols command computes the Nichols chart of a system.



20-sim automatically generates a range of logarithmically displayed frequencies, based on the system dynamics. With the Plot Properties command (right mouse menu), you can change this horizon and recalculate the Nichols chart (click the Nichols command again). The magnitude part of the plot can be displayed in decibels (dB) or in absolute values. The phase part can be displayed in radians or degrees.

Plot Options

Using the right mouse menu, you can use several options:

Plot Properties: Set the plot properties.
Numerical Values: Inspect numerical values.
Magnitude (dB): Display magnitude in decibels
Magnitude (-): Display magnitude in absolute values.
Phase (rad): Display phase in radians.
Phase (deg): Display phase in degrees.
Frequency (rad/sec): Display frequency in radians per second.
Frequency (Hz): Display frequency in Hz.
Phase/Gain Margins: Display the gain and phase margins.
Modulus Margin: Display the Modulus Margin.
Copy to Clipboard: Copy the plot to the windows clipboard.
Print: Print the plot.
Zoom in: Show a detail of the plot.
Zoom out: Show a larger portion of the plot.
Zoom Normal: Show the complete plot.