Question

The major components of a controller are:

(a) Control element

(b) Error detector and control element

(c) Feedback element

(d) Error detector and feedback element

I had been asked this question in class test.

This intriguing question originated from Linear Approximation of the Non-Linear System in chapter Control System and Components of Control Systems

Answer 1

Correct option is (b) Error detector and control element

For explanation I would say: Controller is the extra block used in the system to get the desired characteristics and consists of two major components as the error detector and control element in the forward path.