Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Aero (Aerospace-Engg) 2020 March 6th Sem ANE 321 Automatic Flight Control Previous Question Paper
1 | M- 60530 (S2)-1602
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech. (ANE) (Sem.?6)
AUTOMATIC FLIGHT CONTROL
Subject Code : ANE-321
M.Code : 60530
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
1. Answer briefly :
a) Compare the merits and demerits of feedback control systems in comparison to open
loop control systems.
b) Write down the equation of operation for a PID controller.
c) What is meant by frequency response of a system?
d) Define the transfer function of a control system.
e) State the significance of root loci.
f) State the basic function of I.L.S.
g) List the basic components of a pitch attitude control system.
h) Plot the time response of a second order system.
i) State the transient response parameters of a second order system.
j) What is the purpose of a displacement type auto pilot?
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1 | M- 60530 (S2)-1602
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech. (ANE) (Sem.?6)
AUTOMATIC FLIGHT CONTROL
Subject Code : ANE-321
M.Code : 60530
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
1. Answer briefly :
a) Compare the merits and demerits of feedback control systems in comparison to open
loop control systems.
b) Write down the equation of operation for a PID controller.
c) What is meant by frequency response of a system?
d) Define the transfer function of a control system.
e) State the significance of root loci.
f) State the basic function of I.L.S.
g) List the basic components of a pitch attitude control system.
h) Plot the time response of a second order system.
i) State the transient response parameters of a second order system.
j) What is the purpose of a displacement type auto pilot?
2 | M- 60530 (S2)-1602
SECTION-B
2. For the control system shown in fig. 1, determine k
1
, k
2
and a such that the system will
have a steady state gain of 1.0, a damping ratio f = 0.6 and a material frequency, ?
n
= 5.0.
Fig.1
3. The characteristic equation for a control system to control the output torque of an engine
is :
S (S
2
+ 8S + a) + 4 (S + 8) = 0
Use Routh?s criterion to obtain the range of values of a for which the system is stable.
4. For the system shown in fig. 2, write the characteristic equation and then determine the
value of K such that ?
n
= 3. What is the corresponding value of the damping ratio f?
Sketch the asymptotes of the log-magnitude plot for both the open-loop and closed-loop
frequency response. Determine ?
p
and M
p
.
Fig.2
5. Explain with the help of a block diagram how the damping of the Dutch Roll is
accomplished?
r(t)
+
1
( )
K
D D a ?
K
2
-
( 1)( 2)
K
S S ? ?
R(S)
+
C(S)
-
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1 | M- 60530 (S2)-1602
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech. (ANE) (Sem.?6)
AUTOMATIC FLIGHT CONTROL
Subject Code : ANE-321
M.Code : 60530
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
1. Answer briefly :
a) Compare the merits and demerits of feedback control systems in comparison to open
loop control systems.
b) Write down the equation of operation for a PID controller.
c) What is meant by frequency response of a system?
d) Define the transfer function of a control system.
e) State the significance of root loci.
f) State the basic function of I.L.S.
g) List the basic components of a pitch attitude control system.
h) Plot the time response of a second order system.
i) State the transient response parameters of a second order system.
j) What is the purpose of a displacement type auto pilot?
2 | M- 60530 (S2)-1602
SECTION-B
2. For the control system shown in fig. 1, determine k
1
, k
2
and a such that the system will
have a steady state gain of 1.0, a damping ratio f = 0.6 and a material frequency, ?
n
= 5.0.
Fig.1
3. The characteristic equation for a control system to control the output torque of an engine
is :
S (S
2
+ 8S + a) + 4 (S + 8) = 0
Use Routh?s criterion to obtain the range of values of a for which the system is stable.
4. For the system shown in fig. 2, write the characteristic equation and then determine the
value of K such that ?
n
= 3. What is the corresponding value of the damping ratio f?
Sketch the asymptotes of the log-magnitude plot for both the open-loop and closed-loop
frequency response. Determine ?
p
and M
p
.
Fig.2
5. Explain with the help of a block diagram how the damping of the Dutch Roll is
accomplished?
r(t)
+
1
( )
K
D D a ?
K
2
-
( 1)( 2)
K
S S ? ?
R(S)
+
C(S)
-
3 | M- 60530 (S2)-1602
6. Sketch the root locus plot for the system shown in fig. 3. Determine the value of K to
yield a damping ratio of 0.5.
Fig.3
SECTION-C
7. How will you carry out the design of an autopilot of longitudinal flight control of a
conventional aircraft? State the procedure.
8. What does fly-by-wire mean? How does it prevent unsafe operation of the aircraft outside
of its performance envelope?
9. Write notes on :
a) Acceleration control system
b) Yaw Orientational Control System.
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.
( 1)( 2)
K
S S ? ?
R(S)
+
C(S)
-
5
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This post was last modified on 21 March 2020