B R5944 Pages: 3

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2018

Course Code: EE303
Course Name: LINEAR CONTROL SYSTEMS
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 Derive the closed loop transfer function for a non-unity feedback system. (5)
Write short notes on Force- voltage and Force — current analogy? (5)

Wry

Check the stability of the system given by the characteristic equation (5)
P(s)= ‏تو‎ + 254 + 453 +85? +1654 32

4 What is magnitude and angle criterion? Determine whether the points (-4+j2) is (5)
on the root locus of a unity feedback system with forward transfer function

G(s)-K&+2) 9

3+ و4 + 2ی
‎Define any three frequency response specifications used for the design of (5)‏ 5
‎control system?‏
‎Explain how the stability of a system is analysed using Bode plot? (5)‏ 6
‎State and explain Nyquist stability criterion? (5)‏ 7
‎Sketch the polar plot of type 1 second order system? (5)‏ 8

PART 13
Answer any two full questions, each carries 10 marks.

9 a) Obtain the transfer function using block diagram reduction techniques. (5)

Ris) Y(s)
‏هه‎ −−−−⋅∙
b) Derive the transfer function forthe mechanical system shown in figure. (5)

‎ட?‏ کنا
‎Ke‏ 1

‎f(t)

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