Download GTU B.Tech 2020 Winter 5th Sem 2151908 Control Engineering Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 2151908 Control Engineering Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:2151908 Date:29/01/2021
Subject Name:Control Engineering
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



MARKS
Q.1 (a) Comparison between open and closed loop control system.
03

(b) Define:(1)Plant(2)System (3)Controller(4)Disturbances
04

(c) Explain the following terms: (1) State (2) State space (3) State variable (4)
07
State vector.
Also Explain advantages of state variable method.


Q.2 (a) Write advantage and disadvantages of transfer function
03

(b) Explain mechanics of translation motion with suitable example.
04

(c) Determine the transfer function C(s)/R(s) from the block diagram shown
07
in Figure 1.
le




Q.3 (a) Explain steady state errors for step input.
03

(b) Write advantages of frequency response analysis.
04

(c) Explain transient response specification of a second order control system
07
with neat sketch.




Q.4 (a) Explain steady state errors for parabolic input.
03

(b) Write limitations of frequency response analysis.
04

(c) Explain analysis of first order system and unit step response of first order
07
system.
Q.5 (a) Define: Bandwidth, Cut-off frequency and Cut-off rate for frequency
03
response specification.

(b) Explain Routh's stability criterion.
04

(c) The open loop transfer function of a system is G(s) H(s) =
07
k
Solve the complete root locus and comment on
s(s 2 2 j)(s 2 2 j)
the stability of the closed loop system.



Q.6 (a) Define:Resonant peak, Resonant frequency and Gain crossover frequency
03
for frequency response specification.

(b) Determine the stability of system to s6+2s5+8s4+12s3+20s2+16s+16 using
04
Routh's criterion.

(c) Write general method for drawing root locus with suitable example.
07
Q.7 (a) List various components used in hydraulic control system.
03

(b) Comparison between hydraulic and pneumatic control system.
04
1

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(c) Explain pneumatic proportional integral derivative controller with the help
07
of neat sketch.



Q.8 (a) List various components used in pneumatic control system.
03
(b) Comparison between hydraulic and electric control system.
04
(c) Explain hydraulic proportional derivative controller with the help of neat
07
sketch.


Figure 1


2

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