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 figure.

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

In this figure, 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 Structures

Clicking the FS button cycles through the default feedback structure and several other feedback structures. This figure shows the alternate feedback stuctures.

Figure 4-4: Alternate Feedback Structures

Importing Models into the SISO Design Tool

Loop Responses