Automatic Control Systems - Engineering

Q1:

Consider the systems with following open loop transfer functions
If unity feedback is used, the increasing order of time taken for unit step response to settle is

A 1, 2, 3

B 3, 1, 2

C 2, 3, 1

D 3, 2, 1

ANS:C - 2, 3, 1

. For the three systems the values of ξωn are 1.8, 2.5 and 2 respectively. Hence values of T are 0.55, 0.4 and 0.5 respectively.