B 03000EE303092001 Pages: 3

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

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 carries5 marks. Marks
1 What are the principles which a system to be satisfied to become linear? (5)
2 Explain the working of synchro. How is a synchro useful as error detector? (5)
3 Given open loop system G(s)H(s) = a . Find the generalised error series for (5)

the given input r(t)=t.
4 With the addition of a zero to an existing transfer function, what is the effect (5)

root locus and stability? Explain with example.

5 Using rough sketch illustrate the relation between type of a system and polar (5)
plot.
6 Given open loop transfer function G(s) =: in unity feedback, analyse using (5)

rough sketch the bode plot of the system.

7 What are the advantages of frequency response analysis? Any three (5)
8 Explain Nyquist Stability Criterion. What are it applications. (5)
PART ‏تا‎

Answer any two full questions, each carries 10 marks.
s)
9 The closed loop transfer function of a system is given by <> ‏الك‎ ಮ್‌ find (10)

R(s) s*+1.6s+16
the rise time , peak time, maximum overshoot and settling time of the system
10 a) Derive the transfer function of an RC series circuit with input voltage Vi(s) and (4)
output voltage V,(s) be the voltage across capacitor. Also represent the system
using Block diagram representation.
b) Find the overall transfer function of the system shown in Fig.l using Mason’s (6)

gain formula.

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