Page 130 - Practical Control Engineering a Guide for Engineers, Managers, and Practitioners

A New Do11ain and More Process Models 105

tot

QJ
"'tS
.a
:.= tOO
0..
e
<
to-t
to-2

too
- 0
~
!'J! -too
<U
f
-200 . ,· .....

-300
to-2 tOO
Radian frequency
FIGURE 4-29 Bode plot for integral-only control of a pure dead-time process,
1=0.1, 0=8.

2.5 .--------,.--------,.--------,,...------,,...------,,...-----.----.-~-~----.
2 0 0 0 '0 0 0 0 '0 0 0 0 0 0 0 0
:J ::~ -::><j:::_:; .:: :::···
o/.:;: 00 : 0000 : 0 0 00 0 0
-0.5 0. 0 0 0 0 000 00 0 ............. ,. ...
0
0
-t 0. 0 0 0 0 0 0
~ o ro w ~ ~ ~ 60 70 80 90 too
5

to 20 ~ ~ 50 60 70 80 90 tOO
Time
FIGURE 4-30 Bode plot for integral-only control of pure dead-time process,
I = .1, D = 8 (time domain).