Getting Started

Feedback Structure

The SISO Design Tool by default assumes that the compensator is in the forward path, i.e., that the feedback structure looks like this picture.

Figure 4-3: The Default Feedback Structure -- Compensator in the Forward Path

In this picture, the lettered boxes represent the following:

• G -- plant
• H -- sensor dynamics
• F -- prefilter
• C -- compensator

The default values for F, H, and C are all 1. Note that this means that by default, the compensator has unity gain. G contains the DC motor model, sys_dc.

Alternative Feedback Structure

Clicking the FS button toggles between the default feedback structure and a feedback structure that places the compensator in the feedback path. This picture shows the alternate feedback stucture.

Figure 4-4: Alternate Feedback Structure with the Compensator in the Feedback Loop

Importing Models into the SISO Design Tool

Loop Responses