Page 17 - basic control system
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TERMINOLOGIES OF CONTROL
SYSTEM
Controller output
It is an applied signal or an excitation signal applied to
control system from an external energy source in order to
produce a specified output.
Disturbance
A disturbance is a signal that tends to affect the value of
the output of a system. If a disturbance is created inside
the system, it is called internal. While an external
disturbance is generated outside the system.
Feedback Element
That portion of the output of a system that is returned to
modify the input and thus serve as a performance monitor
for the system.
Feedback is an arrangement by which the actual output of
a system is fed back to the input end for comparison with
the desired output.
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