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The input to a controller is :

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The input to a controller is :

(a) Sensed signal

(b) Error signal

(c) Desired variable value

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

I got this question in class test.

My doubt stems from Design Considerations for Higher-Order Systems in chapter Time Response Analysis, Design Specifications and Performance Indices of Control Systems

1 Answer

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The correct choice is (b) Error signal

To explain I would say: Input to the controller is always the parameter of the system which is to be controlled that is the desirable value.

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