Page 50 - basic control system
P. 50
COMPARISON
OPEN-LOOP CLOSED-LOOP
Any change in output has no Changes in output affect the
effect on the input which is input which is possible by the
feedback is not exist use of feedback
Output measurement is not Output measurement is
required for operation of system necessary
Feedback element is absent Feedback element is present
Inaccurate and unreliable Highly accurate and reliable
Simple to construct and cheap Complicated to design and
hence costly
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