User`s guide

8 Control System Toolbox 5.1 Release Notes
8-2
New Features
This section introduces the new features and enhancements added in the
Control System Toolbox 5.1 since the Control System Toolbox 5.0 (Release
12.0).
For information about Control System Toolbox features that are incorporated
from recent releases, see the Release Notes for Release 12.
SISO Design Tool Enhancements
Enhancements to the SISO Design Tool include the following:
•Save/load session — You can now save the state of the SISO Design Tool
before exiting and restore it at a later time.
•Graphical design constraints — You can use a new set of design constraints
that you move and shape with the mouse or specify by typing their
parameter values. For example, the design constraints for root locus include
damping ratios, settling time, natural frequency, and percent overshoot.
•Interactive open-loop Nichols plot — You can use a new view to graphically
tune the parameters of the feedback compensator. The open-loop Nichols plot
contains the same functionality as the open-loop Bode diagram and root
locus.
•Interactive Prefilter Design view — You can now interactively shape the
prefilter compensator. Both interactive graphics and a right-click menu are
available.
•New compensator format — You can display compensator transfer functions
in the natural frequency format, which is of the form
where ω
z1
,ω
z2
, ... and ω
p1
, ω
p2
, ..., are the natural frequencies of the zeros and
poles, respectively.
For detailed examples of how to use the SISO Design Tool, see “Designing
Compensators” in Getting Started with the Control System Toolbox.
dcgain
1 s ω
z
1
⁄+()
1 s ω
p1
⁄+()
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