Specifications

Menu Bar
13-13
•Open-Loop Nyquist — The open-loop Nyquist plot for your system
•
Open-Loop Nichols — The open-loop Nichols plot for your system
Customizing Loop Responses
If you choose Custom from the list of loop responses, the Response Plot Setup
window opens.
Figure 13-7: Response Plot Setup Window
This window has many options for creating more specialized response plots,
but to use it properly you should be familiar with the basic features of the LTI
Viewer. If you are not, see Analyzing Models in GettingStartedwiththe
Control System Toolbox or “LTI Viewer” in the online documentation.
Loop diagram. At the top of the Response Plod Setup window is a loop diagram.
This block diagram shows the feedback structure of your system. The diagram
in Figure 13-7 shows the default configuration; the compensator is in the
forward path. If your system has the compensator in the feedback path, this
window correctly displays the alternate feedback structure.
The loop block diagram shows the arrangement of the components of your
system and the input/output structure. When selecting open- and closed-loop
responses in the Contents of Plots panel, refer to the loop diagram for
definitions of the responses.
Note that window lists two transfer functions next to the loop diagram: