National Instruments Xmath Interactive Control Design Module ICDM Instrukcja Użytkownika Strona 61

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Chapter 6 Pole Place Synthesis
Xmath Interactive Control Design Module 6-6 ni.com
A circle of radius F
avg
also is displayed in the plot. You also can drag the
circle to change F
avg
.
Butterworth Configuration
Click the Butterworth button to move the poles to a Butterworth
configuration, preserving F
avg
. The initial pole configuration also is
set to Butterworth.
Editing the Closed-Loop Poles
You can change the closed-loop poles two ways: by editing or by grabbing
and dragging them. Both of these methods are described in the General
Plotting Features section of Chapter 2, Introduction to SISO Design.
Slider and Plot Ranges
To change the ranges of the Frequency Scaling slider or the plot of
closed-loop poles, select View»Ranges or press <Ctrl-R> in the Pole Place
window.
The slider range also will be changed automatically if you type a new value
which is outside the current range in the variable edit box. The plot also can
be re-ranged interactively by grabbing and dragging the plot axes; refer to
the General Plotting Features section of Chapter 2, Introduction to SISO
Design.
Selecting View»Auto-scale or pressing <Ctrl-A> in the Root Locus
window will cause new ranges to be assigned to the slider and plot,
based on the current controller.
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