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The input of a controller is

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in Control Systems by (105k points)
The input of a controller is

(a) Sensed signal

(b) Error signal

(c) Desired variable value

(d) Signal of fixed amplitude not dependent on desired variable value

The question was posed to me in my homework.

I want to ask this question from Tuning of PID Controllers topic in division Design of Control Systems

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Right choice is (b) Error signal

To explain I would say: Controller is the block in the control system that control the input and provides the output and this is the first block of the system having the input as the error signal.

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