ர 03000EE303092002 Pages: 3

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: EE303
Course Name: LINEAR CONTROL SYSTEMS

Instructions: Graph sheets and semi log sheets are to be provided

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 (5)

How do you analyse the performance of a mechanical system using electrical

analogy? Explain with suitable example for Force- Voltage analogy.

0 With relevant characteristics, explain the applications of synchro transmitter and (3)
receiver units?
3 The input to a closed loop system with open loop transfer function (5)
G ‏کا‎ (ऽ + 3) ⋅ ⋅ ⋅
(s)= ത്ത്‌ ത ഫേടിട്ട of a step function and a ramp function as,
ऽ (ऽ “+38 +2)
r(t)= 2 u(t) + t. Determine the value of K such that the steady state error for the
system 15 ௨ 0.1. Determine the static error coefficients also.
4 How do you determine the angle of departure of root locus branch from an open (5)
loop pole, using angle criterion.
5 Derive and explain the dependence of damping factor on the resonant peak (M,) (5)
of a second order system?
6 Explai ⋅⋅⋅ ⋅ (5)
xplain the significance of gain cross over frequency and phase cross over
frequency in the system performance with suitable characteristics.
7 ⋅ ∙ ∙⋅⋅∙⊨↗ (5)
State and explain Nyquist stability criterion?
8 Obtain the polar plot and hence determine the value of K such that the system (5)
⋅ on 6 K ⋅ ⋅
⋁⋁↥∐↧∘⊑≱⊜⊓∣∘∘↧⊃↥⊺⋜⋯⊱∱⊜↾↾∐∏∁↥⇂∘∏≼∆⊽⋟−−−⇂⊱⋯≵⇂⊺≣⋯∂∐⊃∣

ऽ (ऽ + 1)(ऽ + 4)

stable?

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