Exam Questions Papers - Engineering

Q1:

A unity negative feedback closed loop system has a plant with the transfer function and a controller Gc(S) in the feed forward path. For a unit set input, the transfer function of the controller that gives minimum steady state error is

A

B

C

D

ANS:D -

so, Gc(s)|s → 0 should be maximum for low error = ∞ Gc(s)|s → 0.