Specifications

Root Locus Right-Click Menus
13-27
•Complex Zero
•Differentiator (zero at 0)
•
Lead
•Lag
•Notch
In all but the integrator and differentiator, once you select the configuration,
yourcursor changestoan ‘x’.Toadd theitemtoyour compensatordesign,place
the x at the desired location on the plot and left-click your mouse. You will see
the root locus design automatically update to include the new compensator
dynamics.
The notch filter has three adjustable parameters. For a discussion about how
to add and adjust notch filters, see Adding a Notch Filter in Getting Started
with the Control System Toolbox.
Delete Pole/Zero
Select Delete Pole/Zero to delete poles and zeros from your compensator
design. When you make this selection, your cursor changes to an eraser. Place
the eraser over the pole or zero you want to delete and left-click your mouse.
Note the following:
•You can only delete compensator poles and zeros. Plant (
G in the feedback
structure panel) poles and zeros cannot be altered.
•If you delete one of a pair of poles or zeros, the other member of the pair is
also removed.
Edit Compensator
Edit Compensator opens the Edit Compensator window, which you can use
to change the compensator gain and add or remove compensator poles and
zeros from your design. See “Edit” for a discussion of this window.