Download PTU B.Tech 2021 Jan EE 5th Sem 78310 Control Systems Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January EE 5th Sem 78310 Control Systems Previous Question Paper

Roll No.
Total No. of Pages : 03
Total No. of Questions : 18
B.T ech. (Electrical & Electronics)/(Electr ical Engineering)/
(Electronics & Electrical) (Sem.?5)
CONTROL SYSTEMS
Subject Code : BTEE-502-18
M.Code : 78310
Time : 3 Hrs. Max. Marks : 60
INST RUCT ION TO CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1)
What do you mean by linear time invariant system? Discuss.
2)
Discuss the advantages of block diagram algebra.
3)
What do you mean by Ramp input test signal? Discuss.
4)
What do you mean by relative stability? Discuss.
5)
a) List the characteristics and advantages of state variable modelling.
b) Discuss the need of state variable analysis.
6)
What is gain margin? Explain.
7)
Discuss the principle of Nyquist criterion.
8)
List the various advantages of root locus.
9)
What is the need of optimal control? Explain.
10) Define state and state variable.
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SECTION-B
11) Differentiate between open loop and closed loop control systems? Mention at least TWO
examples of each type of system. Also discuss the benefits of feedback.
12) Determine the stability of the system using Routh-Hurwitz criteria whose characteristics
equation is given by s6 + 4s5 + 3s4 + 4s3 + 2s2 + 17s + 33 = 0
13) Explain the terms :
a) Steady state accuracy
b) Transient accuracy
c) Disturbance rejection
d) Insensitivity
e) Robustness
14) Sketch the Bode plot (magnitude plot only) of the following transfer function
2000
G s H s
.
s s 2s 100
15) Find the controllability and observability of the following system.
0
1
0
xt
x
t
u
t
0
4
.
1 3
.
1
y t 0.8
1 x t
SECTION-C
25
16) A unit feedback system has an open loop transfer function G s
.Derive the
s s 8
output equation in time domain for this system, if it is exposed to unit Step input. Also
calculate the Rise time, Peak time and Maximum peak overshoot for step input.
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K
17) a) Design a phase lag compensating network for G s
to meet the
s 1 0 1
. s1 0 2
. s
following specifications : Kv = 30 sec?1, P.M.
b) Sketch the Nyquist plot and there from assess the stability of the closed loop system
K s 4
whose open loop transfer function is G s H s
.
2
s s
1
18) Discuss the following :
a) Basic concepts of Nonlinear system.
b) Root locus method of feedback controller design.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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