Download PTU B-Tech AR-Automation-And-Robotics 2020 Dec 4th Sem 57108 Linear Control Systems Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (AR)- Automation-And-Robotics 2020 December 4th Sem 57108 Linear Control Systems Previous Question Paper

Roll No.
Total No. of Pages : 03
Total No. of Questions : 18
B.Tech.(Automation & Robotics) (2012 & Onward) (Sem.?4)
LINEAR CONTROL SYSTEMS
Subject Code : BTEE-402
M.Code : 57108
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O 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 are the advantages of Modern Control Theory over Classical Control Theory?
2.
Why is compensation required?
3.
What is the difference between absolute and relative stability?
4.
Write down Mason's Gain Formula and describe each symbol.
5.
Define the term Damping ratio and discuss its effects on the output of any system.
6.
Describe Type of any system. Find the relation of static error constants w.r.t Type-I system.
7.
Draw circuit of Phase lag network and state the advantages of using it.
8.
What is the difference between Break-in and Break away Point?
9.
What do you mean by Sampled Data control system?
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10. Draw the F-V and F-I analogous circuit for following circuit of Fig. 1.
+
f
x1
B
k1
M
x2
k2
FIG.1
SECTION-B
11. A unity feedback control system having forward path transfer function G(s) = 16/[s(s + 1)].
Determine n and If negative feedback of (1 + Ks) is introduced to forward path transfer
function, find the value of K to reduce Mp from 75% to 25%.
12. Derive the co-relation between Mp, Mr and r, d. Derive their relations and explain them
graphically.
13. The open loop transfer function of a ufb control system is given by :
K
G s
s s 2
2
4 s 6s 25
By applying Routh Criterion, discuss the stability of the closed loop system as a function of
K. Determine the value of K which will cause sustained oscillations in the closed loop
system and also find corresponding oscillation frequencies?
14. Derive mathematical model for armature controlled D.C motor.
15. Describe synchros as error detector.
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SECTION-C
16. Find C/R using Block Diagram Reduction Technique. Verify your answer using SFG
technique.
H2
+
R
?
C
G1
G2
G3
?
?
+
+
H1
FIG.2
K
17. Plot the Root Locii for the closed loop control system with G s
.
s s 2
1 s 4s 8
1000
18. Sketch the Bode Plot for the transfer function G s
.
s 1 0 1
. s1 0 0
. 01s
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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