| Using the SISO Design Tool and the LTI Viewer | ![]() |
Using the Right-Click Menu to Design Compensators
The quickest way to design compensators is to use the right-click menu. Ths SISO Design Tool includes right-click menus for all the views available in the tool. These views include the root-locus, open-loop Bode diagrams, Nichols plot, and the prefilter Bode diagrams. The menu items in each of these views are identical. The design constraints, however, differ, depending on which view you are accessing the menus from.
You can use the right-click menu to design a compensator by adding poles, zeros, lead, lag, and notch filters.
Adding Dynamics to Your Compensator
The Add menu options give you the ability to add dynamics to your compensator design, including poles, zeros, lead and lag networks, and notch filters. This figure shows the Add submenu.

The following pole/zero configurations are available:
In all but the integrator and differentiator, once you select the configuration, your cursor changes to an `x'. To add the item to your compensator design, 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.
| Prefilter Bode Diagram | Example: Adding a Complex Pair of Poles | ![]() |
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