Download PTU B.Tech 2020 March Automation-And-Robotics Question Paper 4th Sem BTEE 402 Linear Control Systems

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Automation-And-Robotics 4th Sem BTEE 402 Linear Control Systems 2020 March Previous Question Paper

1 | M - 57108 (S2)-1655
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Automation & Robotics) (2012 & Onward) (Sem.?4)
LINEAR CONTROL SYSTEMS
Subject Code : BTEE-402
M.Code : 57108
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
Q1. Answer briefly :
a) Define ramp signal.
b) What are the standard test signals employed for time domain studies ?
c) What is transient response ?
d) What is a lag lead compensator ?
e) Give the limitations of frequency response analysis.
f) Define a decade in bode plot.
g) What are frequency domain specifications ?
h) What is function of error detector in control system ?
i) Define phase-cross over frequency.
j) Why the zeros on the real axis near the origin are generally avoided in design ?

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1 | M - 57108 (S2)-1655
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Automation & Robotics) (2012 & Onward) (Sem.?4)
LINEAR CONTROL SYSTEMS
Subject Code : BTEE-402
M.Code : 57108
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
Q1. Answer briefly :
a) Define ramp signal.
b) What are the standard test signals employed for time domain studies ?
c) What is transient response ?
d) What is a lag lead compensator ?
e) Give the limitations of frequency response analysis.
f) Define a decade in bode plot.
g) What are frequency domain specifications ?
h) What is function of error detector in control system ?
i) Define phase-cross over frequency.
j) Why the zeros on the real axis near the origin are generally avoided in design ?

2 | M - 57108 (S2)-1655
SECTION-B
2. Discuss sampled data control system with the help of a block diagram. Write its advantages
and disadvantages.
3. Convert the following block diagram into its equivalent signal flow graph.


4. State how steady state error of a control system is determined ? How it can be reduced ?
5. Discuss the working of a servo motor with the help of suitable diagram.
6. What is a multivariable system ? Discuss with a suitable example. Also discuss issues in
the analysis and design of multivariable control systems.

SECTION-C
7. Sketch the Nyquist plot for the system with the open loop transfer function
( )
( 1) ( 1.5) ( 2)
K
G s
s s s
?
? ? ?

and determine the range of K for which the system is stable.

R(s)
y
1
y
2
y
3
y
4
G
1
G
2
H
1
H
2
G
3
G
4
G
5
y
5
y
6
y
7
y
8
y
9
Y (s)
H
3
+
?
+
+
+
+
+
?
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1 | M - 57108 (S2)-1655
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Automation & Robotics) (2012 & Onward) (Sem.?4)
LINEAR CONTROL SYSTEMS
Subject Code : BTEE-402
M.Code : 57108
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
Q1. Answer briefly :
a) Define ramp signal.
b) What are the standard test signals employed for time domain studies ?
c) What is transient response ?
d) What is a lag lead compensator ?
e) Give the limitations of frequency response analysis.
f) Define a decade in bode plot.
g) What are frequency domain specifications ?
h) What is function of error detector in control system ?
i) Define phase-cross over frequency.
j) Why the zeros on the real axis near the origin are generally avoided in design ?

2 | M - 57108 (S2)-1655
SECTION-B
2. Discuss sampled data control system with the help of a block diagram. Write its advantages
and disadvantages.
3. Convert the following block diagram into its equivalent signal flow graph.


4. State how steady state error of a control system is determined ? How it can be reduced ?
5. Discuss the working of a servo motor with the help of suitable diagram.
6. What is a multivariable system ? Discuss with a suitable example. Also discuss issues in
the analysis and design of multivariable control systems.

SECTION-C
7. Sketch the Nyquist plot for the system with the open loop transfer function
( )
( 1) ( 1.5) ( 2)
K
G s
s s s
?
? ? ?

and determine the range of K for which the system is stable.

R(s)
y
1
y
2
y
3
y
4
G
1
G
2
H
1
H
2
G
3
G
4
G
5
y
5
y
6
y
7
y
8
y
9
Y (s)
H
3
+
?
+
+
+
+
+
?
3 | M - 57108 (S2)-1655
8. What information can you obtain from the root locus? Explain the method for calculating
the breakaway points, draw the root locus plot for a system with
2
( ) ( )
( 4 10)
k
G s H s
s s s
?
? ?

Determine angles of departure and the approximate positions of the closed loop poles for k
= 10.
9. Design a suitable lead compensator for a system with unity feedback and having open loop
transfer function
4
( )
( 1) ( 4)
G s
s s s
?
? ?
to meet the specifications
a) Damping ratio = 0.5.
b) Undamped natural frequency = 2 rad/sec.






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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