The open-loop Bode diagram displays magnitude and phase plots for your system.
Bode Magnitude Plot
This plot displays the Bode magnitude of the open-loop system. Grab the curve with your mouse and drag it up and down to increase or decrease the compensator gain. Use the right-click menus to add dynamics to your compensator and to display grids, gain margins, etc.
Bode Phase Plot
This curve displays the Bode phase response of the open-loop system.
Gain and Phase Margins
The open-loop Bode magnitude and phase plots automatically display gain and phase margins of the open-loop control system. The display also shows the frequencies at which the magnitude and phase cross 0 db and -180 respectively. If the gain or phase margin is infinite, Inf is displayed.
Brown Stems
When the gain or phase margin is finite, a brown stem appears to represent the margin.
Working With the Bode Diagram
Use the right-click menu to perform basic tasks, such as adding compensator dynamics, in the Bode diagram.
Example
See Bode Diagram Design for an example of designing a compensator using Bode diagram techniques.