User`s guide

6 The LTI Viewer
6-4
Getting Started Using the LTI Viewer: An Example
This section contains a brief introduction to the LTI Viewer through an
example that leads you through the following steps:
1 LoadtwoLTI models into theLTIViewer,initializedwith the stepresponses
and Bode plots of both models.
2 Us e the right-click menu to display markers for
- The settling time on the step responses
- The peak magnitude response on the Bode plots
3 Use the mouse to display the values of these response characteristics on the
plots.
4 Import a third LTI model to the LTI Viewer for comparison.
5 Use t he right-click menu to zoom in on a plot.
Suppose you have a set of compensators you’ve designed to control a system,
and you want to compare the closed-loop step responses and Bode plots. You
candothiswiththeLTIViewer.
A sample set of closed-loop transfer function models are included ( along with
some other models) in the MAT-file
LTIexamples.mat.Type
load LTIexamples
Inthisexample, youanalyzetheresponseplotsofthesethreetransferfunction
models.
Gcl1, Gcl2, Gcl3
Transfer function:
4 s^3 + 8.4 s^2 + 30.8 s + 60
---------------------------------------
s^4 + 4.12 s^3 + 17.4 s^2 + 30.8 s + 60