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06000EE303122001

PART C
Answer any two full questions, each carries10 marks.
Using Routh-Hurwitz criterion find the number of poles on the left half of s-

plane and comment on the stability of the system with characteristic equation

.72 + 365 + 4152 + 1653 + 1254 + 5و4 + كو = ‎F(s)‏

The closed loop transfer function of a unity feedback system is given by oa =
Ks+p
s*+astp°

Determine the steady state error for unit ramp input.

K
s(s+2)(s?+4s+8)°

Sketch root locus for a system with G(s)H(s) = Find the value of

K for sustained oscillation.
Write a note on angle and magnitude condition of root locus.

For a unity feedback system with open loop transfer function G(s) =

K(s+0.5)

ട്രാ Find the value of K so that steady state error is to be kept less than
5(5+1) 2(5+0.25)

0.05 for ೩೫170010870) = 2 + ‏.غ5‎

PART D
Answer any two full questions, each carries 10 marks.
2(s+0.25)

s?(s+1)(s+0.5)" Use

The open-loop transfer function of a unity feedback system is

asymptotic approach to plot the bode diagram and determine gain margin and

phase margin. Also comment about the stability.

Sketch the polar plot of a unity feedback control system having an open loop
⋅ −↕∘≼≤⊹∑≻
transfer function G(s) = ദ്‌;

What is transportation lag in control system?
State and explain Nyquist stability criterion.

Draw Nyquist plot for the system the open loop transfer function given below

(s+0.5)

G(s)H(s) = s2(s+1)(s+2)°

Comment on the closed loop stability.

اد عاد عاد ‎ok‏

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