Introduction to Control Systems 12

12. ……………. is the reference input minus the primary feed back.

(a) Manipulated variable
(b) Zero sequence
(c) Actuating signal
(d) Primary feedback

Answer : (c)

Explanation : 

Actuating signal : The signal that is difference between the reference input and the feedback signal if actuates the control unit in order to maintain the output of the desired value.

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