Control System Lab
QUESTION BANK
1.
DC SPEED CONTROL SYSTEM
(a) To study D.C. speed control system on open loop and close loop.
(b) To study of Transient performance, another time signal is added at the input of
control Circuit.
(c) To study how eddy current breaking is being disturbance rejected by close and
open loop.
1. What are the various ways of varying the speed of Dc motors?
2. What is eddy current breaking in Dc speed control?
3. Can a rotary dimmer be used to control Dc motor speed?
4. What is AWG?
5. What are the various components used in Dc speed control?
6. Compare Dc and Ac speed control system.
7. What are the advantages and disadvantages of a\dc motor?
8. What are the advantages and disadvantages of an Ac motor?
9. What are the observations of Dc speed control on open loop system?
10. What are the observations of Dc speed control on open loop system?
2.
DC MOTOR POSITION CONTROL
(a) To study of potentiometer displacement constant on D.C. motor position control.
(b) To study of D. C. position control through continuous command.
(c) To study of D.C. position control through step command.
(d) To study of D.C. position control through Dynamic response.
1. What is a servomotor?
2. What is the working principle of DC servomotor?
3. What is the purpose of DC servomotor?
4. What are the components of DC position control?
5. How is position control achieved?
6. What are the applications of DC servomotors?
7. What is meant by the dynamic response of DC servomotor?
8. What is the difference between AC and DC servomotors?
9. What are the advantages of AC servomotor over Dc servomotor?
10. What are the different servo modes used?
3.
AC MOTOR POSITION CONTROL
(a) To study of A.C. motor position control through continuous command.
(b) To study of error detector on A.C. motor position control through step command.
(c) To study of A.C. position control through dynamic response.
1. What is the working principle of AC servo motor?
2. What is the purpose of AC servomotor?
3. What are the components of AC position control?
4. How is position control achieved?
5. What are the applications of AC servomotors?
6. What is meant by the dynamic response of DC servomotor?
7. What is the difference between AC and DC servomotors?
8. What are the advantages of AC servomotor over Dc servomotor?
9. What are the different servo modes used?
10. Why a revolver is used in Ac servo motor?
4.
MAGNETIC AMPLIFIER
(a) To study Input / Output characteristic of a magnetic amplifier in mode (i)
Saturable Reactor, (ii) Self Saturable Reactor.\
1. Describe the basic operation of magnetic amplifier.
2. State the common usage of magnetic amplifier.
3. Describe the purpose of various components of magnetic amplifier.
4. Describe various methods of changing inductance.
5. Describe saturable core reactor.
6. Describe in detail the circuitry of magnetic amplifier.
7. Give the purpose of saturable reactor in magnetic amplifier.
8. Explain working of magnetic amplifier in saturable reactor mode.
9. Explain working of magnetic amplifier in self saturable reactor mode.
10. Compare the input and output characteristics in both the modes.
5.
SYNCHRO TRANSMITTER / RECEIVER
(a) To study of Synchro Transmitter in term of Position v/s Phase and voltage
magnitude with respect to Rotor Voltage Magnitude/Phase.
(b) To study of remote position indication system using synchro transmitter/receiver.
1. Define the term “synchro”.
2. State the primary purpose of Synchro.
3. Name the two types of synchro identification code.
4. Draw the five standard schematic symbols for synchro and identify all
connections.
5. List the basic components that compose a torque synchro system.
6. Define the term “correspondence” and explain how it is used in simple
synchro system.
7. Write a brief note about Synchro Transmitter.
8. Write a brief note about Synchro Receiver.
9. State the difference between Synchro transmitter and synchro receiver.
10. Explain what happens when the rotor leads on Synchro transmitter and
synchro receiver are reversed.
6.
PID CONTROLLER
(a) To observe open loop performance of building block and calibration of PID
Controls.
(b) To study P, PI and PID controller with type 0 system with delay.
(c) To study P, PI and PID controller with type 1 system.
1. What is a controller?
2. What is the difference between a compensator and controller?
3. Write a brief note about Proportional Controller.
4. Write a brief note about Derivative Controller.
5. Write a brief note about Integral Controller
6. Write a brief note about PID Controller.
7. Compare the performance of PI and PD controller.
8. Which controller is used for improving the transient response of the system?
9. Which controller is used for improving the steady state response of the
system?
10. What is the purpose of PID controller ?.
7.
LEAD LAG COMPENSATOR
(a) To study the open loop response on compensator.
(b) Close loop transient response.
1. Write a brief note about Lag Compensator.
2. Write a brief note about Lead Compensator.
3. Write a brief note about Lag Lead Compensator.
4 The max. phase shift provided for lead compensator with transfer function
G(s)=(1+6s)/(1+2s)
5. Which compensation is adopted for improving transient response of a negative unity
feedback system?
6. Which compensation is adopted for improving steady response of a negative unity
feedback system?
7. Which compensation is adopted for improving both steady state and transient
response of a negative unity feedback system?
8. What happens to the gain crossover frequency when phase lag compensator is
used?
9. What happens to the gain crossover frequency when phase lead compensator is
used?
10. What is the effect of phase lag compensation on servo system performance?
8.
LINEAR SYSTEM SIMULATOR
(a) Open loop response
(i) Error detector with gain, (ii) Time constant, (iii) Integrator
(b) Close loop system
(I) First order system (II) Second order system (III) Third order system
9.
Introduction to MATLAB (Control System Toolbox), Implement atleast any
two experiment in MATLAB.
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11.
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10.
What is Matlab?
What are the matlab system parts?
Explain the matlab working environment.
What are the matlab system parts?
Explain matlab mathematical function library.
Explain the matlab’s API.
What is vectorisation in matlab?
On what machines matlab should be run?
How to call matlab in batches?
Explain Handle graphics in matlab.
Explain the following commands:
Acker
Bode
Ctrb
Dstep
Feedback
Impulse
Margin
Place
Rlocus
stairs
MATLAB
List of Experiment
1.
Introduction to MATLAB
2.
Different Toolboxes in MATLAB, Introduction to Control
Systems Toolbox.
3.
Determine transpose, inverse values of given matrix.
4.
Plot the pole-zero configuration in s-plane for the given transfer
function.
5.
Determine the transfer function for given closed loop system in
block diagram representation.
6.
Plot unit step response of given transfer function and find peak
overshoot, peak time.
7.
Plot unit step response and to find rise time and delay time.
8.
Plot locus of given transfer function, locate closed loop poles for
different values of k.
9.
Plot root locus of given transfer function and to find out S, Wd,
Wn at given root & to discuss stability.
10.
Plot bode plot of given transfer function.
11.
Plot bode plot of given transfer function and find gain and phase
margins
12.
Plot Nyquist plot for given transfer function and to compare their
relative stability
13.
Plot the Nyquist plot for given transfer function and to discuss
closed loop stability, gain and phase margin.