Continued from page 1
Machines are made to replace humans in most control systems today.
The basic feature of any control system consists of 4 elements. These are
measuring element,
controlling element,
set value, and
correcting element.
The measuring element provides a means of detection/measurement of
conditions required. This is
"eyes" or "ears" (or other senses) of
system.
The controlling element is
place where all
decisions on what actions to take are being made. It can be considered
"brains" of
system. It must make decisions based on certain guidelines or values required. The set values are inputted into
system by humans.
The correcting element is where
correction to
process is done. It can be considered like
"hands" or "feet" of
system. It must take certain physical actions to bring
processes back to
set value.
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