Page 38 - Practical Control Engineering a Guide for Engineers, Managers, and Practitioners
P. 38
Qualitative Concepts in Coutrol Engineerilg l3
-Front only
· · · Front, mid & rear
1.3
1.2
:; 1.1 /': .
.&
8 1
!a
cu •
~ :
&:: 0.9 :
150 200 400 450 500
Time
FIGURE 1·16 Control of a molten glass forehearth, alternative view.
2 0 0 0
-Front only
···Front& mid
- - Front, mid & rear
0.5 0 0 0 • • • • •••• ••••• : • •••• ~ ••
0
0
0
0
0 50 100 150 200 250 300 350 400 450 500
Time
FIGURE 1-17 Effect of removing disturbances.
