DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK IV SEMESTER EC6405 –Control System Engineering Regulation – 2013 Academic Year 2017 – 18 Prepared by Ms. Indu Nikhil, Assistant Professor (O.G)/ECE Ms. A. Suganya, Assistant Professor (O.G)/ECE Ms. Mercy Subaraman, Assistant Professor (O.G)/ECE
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DEPARTMENT OF
ELECTRONICS AND COMMUNICATION ENGINEERING
QUESTION BANK
IV SEMESTER
EC6405 –Control System Engineering
Regulation – 2013
Academic Year 2017 – 18
Prepared by
Ms. Indu Nikhil, Assistant Professor (O.G)/ECE
Ms. A. Suganya, Assistant Professor (O.G)/ECE
Ms. Mercy Subaraman, Assistant Professor (O.G)/ECE
VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur – 603 203.
DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING
QUESTION BANK SUBJECT : EC6405 – CONTROL SYSTEM ENGINEERING SEM / YEAR: IV / II year B.E.
EC6405 CONTROL SYSTEM ENGINEERING
UNIT I – CONTROL SYSTEM MODELLING
Basic Elements of Control System – Open loop and Closed loop systems - Differential equation -
Transfer function, Modeling of Electric systems, Translational and rotational mechanical systems -
Block diagram reduction Techniques - Signal flow graph
PART A
Q.No Questions BT
Level
Domain
1. Compare the Open loop System with Closed loop System. BTL 4 Analyzing
2. Design an Electrical analogous network for the mechanical
system shown in the fig. using Force-Voltage Analogy.
BTL 6 Creating
3. Mention the transfer Function of the System. BTL 1 Remembering
4. List the advantages of Closed loop System? BTL 1 Remembering
5. What are the Properties of Signal flow graphs? BTL 1 Remembering
6. Mention about Mason’s gain formula of Signal flow graph. BTL 2 Understanding
7. Explain any two dynamic models to represent control
system.
BTL5 Evaluating
8. Discuss about the block diagram and its components of a
control system.
BTL 2 Understanding
9. Demonstrate the basic elements used for modelling a
mechanical rotational system.
BTL 3 Applying
10. Assess feedback and its types employed in Control system. BTL 4 Analyzing
11. Negative feedback is preferred in control system. Justify
your answer.
BTL 5 Evaluating
12. Write F-V Analogy for the elements of mechanical rotational
system?
BTL 1 Remembering
13. Illustrate any two rules to be followed in block diagram
reduction techniques.
BTL 3 Applying
14. Define Control System BTL 1 Remembering
15. Analyze non-touching loops. BTL 4 Analyzing
16. Interpret signal flow graph BTL 2 Understanding
17. Name the two types of electrical analogous for mechanical
system.
BTL 1 Remembering
18. Formulate force balance equation of ideal spring, ideal mass. BTL 6 Creating
19. Calculate transfer function of the network
BTL3 Applying
20. Outline mathematical model of a system. BTL 2 Understanding
PART –B
1. (i)How could you determine the Transfer Function of the
system Shown in the fig? (7)
(ii)Estimate the Transfer function of the electrical network
shown in the fig. (6)
BTL 5
Evaluating
2. (i) Design the Block diagram to its Canonical form and
obtain C(s)/R(s). (8)
(ii) Elaborate the differences between block diagram and
Signal flow graph methods. (5)
BTL 6
Creating
3. Solve C/R for the signal flow graph shown below. (13)
BTL 3
Applying
4. (i) Consider the Mechanical system shown below and write
the Differential equation. (7)
(ii) Draw the torque-voltage electrical analogous circuit for
the mechanical system shown below. (6)
BTL1
Remembering
5. (i) State any five block diagram reduction rules with
example. (8)
(ii) Mention in detail about any five terminologies used in
signal flow graph. (5)
BTL1
Remembering
6. (i) Determine the equivalent signal flow graph and obtain
C/R using mason’s gain formula for the block diagram show
below. (6)
(ii) For the block diagram shown below, examine the output
C/R. (7)
BTL4
Analyzing
7. Using SFG, Analyze the overall Transfer function for the
system shown in the fig. (13)
BTL4
Analyzing
8. How can you explain the differential equations governing the
mechanical rotational system shown in Fig. and estimate the
T-V and T-I electrical analogous circuits. (13)
BTL 1 Remembering
9. Demonstrate the differential Equations governing the
mechanical system shown in the fig. and determine the
transfer function. (13)
BTL2
Understanding
10. (i) Interpret the overall transfer function of the system shown
in the fig. (8)
(ii)Estimate the overall transfer function of the system
shown in the fig. (5)
BTL2
Understanding
11. (i) Recall the functional blocks of closed loop feedback
control system. (6)
(ii) Give the step by step procedure of determining the
transfer function from the signal flow graph. (7)
BTL1
Remembering
12. (i)Reduce the block diagram shown in figure and find C/R.
(8)
(ii) Explain the basic elements of mechanical rotational
systems?Write its force balance equations. (5)
BTL 4 Analyzing
13. Determine the overall transfer function C(S)/R(S) for the
system shown in figure. (13)
BTL 3 Applying
14. (i) Explain with a neat block diagram explain the working of
Armature controlled DC motor as a control system. (8)
(ii)Explain the features of closed loop control system. (5)
BTL 2 Understanding
PART –C
1. Deduce the transfer function of system shown in figure. (15)
BTL 6 Creating
2. Solve X2/X1 using state Mason’s gain formula and state it.
(15)
BTL 5 Evaluating
3. (i) Estimate the C/R for the Signal flow graph shown below
using Mason’s gain formula. (8)
(ii) Elaborate the Transfer Function C(S)/R(S) of block
diagram shown below. (7)
BTL 6
Creating
4. Estimate the transfer function for thefollowing electrical
network. (8)
(ii) Derive the transfer function of a field controlled DC
Motor with detailed equations. (7)
BTL 5 Evaluating
UNIT II TIME RESPONSE ANALYSIS
Time response analysis - First Order Systems - Impulse and Step Response analysis of second order
systems - Steady state errors – P, PI, PD and PID Compensation, Analysis using MATLAB
PART A
Q.No Questions BT
Level
Domain
1. Illustrate how a Control system is classified depending on the
value of damping ratio?
BTL 3 Applying
2. With reference to time response, Examine peak time. BTL 4 Analyzing
3. Define rise time. BTL 1 Remembering
4. The damping ratio and natural frequency of a second order
system are 0.5 and 8 rad/sec respectively. Calculate resonant
peak and resonant frequency.
BTL 3 Applying
5. Recall damping ratio. BTL 1 Remembering
6. Construct a ramp, parabolic and impulse signal. BTL 6 Creating
7. Determine the Damping ratio and natural frequency of
oscillation for the closed loop transfer function of a second
order system is given by 40022
400
SS
BTL 5 Evaluating
8. What is meant by peak overshoot? BTL 1 Remembering
9. Outline the response of the second order under damped
system.
BTL 2 Understanding
10. Draw a step signal. BTL 1 Remembering
11. Mention steady state error. BTL 1 Remembering
12. Generalize why derivative controller is not used in Control
systems.
BTL 6 Creating
13. List the advantages of generalized error coefficients. BTL 1 Remembering
14. Describe the transient and steady state response of control
system?
BTL 2 Understanding
15. Illustrate the units of kp, kv, ka . BTL 2 Understanding
16. Give steady state errors to a various standard inputs for type 2
systems.
BTL 2 Understanding
17. Point out the time domain specifications. BTL 4 Analyzing
18. Summarize the generalized error and static error constants. BTL 5 Evaluating