Question

The system with the open loop transfer function 1/s(1+s) is:

(a) Type 2 and order 1

(b) Type 1 and order 1

(c) Type 0 and order 0

(d) Type 1 and order 2

I have been asked this question by my college professor while I was bunking the class.

This intriguing question originated from Time Domain Analysis topic in chapter Stability in Frequency Domain of Control Systems

Answer 1

The correct answer is (d) Type 1 and order 2

For explanation: Type is defined as the number of poles at origin and order is defined as the total number of poles and this is calculated with the help of the transfer function from the above transfer function the type is 1 and order is 2.