Question

The loop transfer function of controller Gc(s) is :

(a) 1+0.1s/s

(b) -1+0.1s/s

(c) –s/s+1

(d) s/s+1

I have been asked this question in an interview.

This is a very interesting question from Time Response of Second Order Systems in division Time Response Analysis, Design Specifications and Performance Indices of Control Systems

Answer 1

Correct answer is (a) 1+0.1s/s

The explanation: The transfer function of the controller is 0.1s+1/s

Gc(s) = 0.1s+1/s.