SRM University 2007 B.Tech Electronics and Communications Engineering UNIT – II - Question Paper

UNIT – II
PART-A

1. What are the basic components of an automatic control system?
2. What is automatic controller?
3. What is the need for a controller?
4. What are the various kinds of controllers?
5. What is a potentiometer?
6. What are the differences ranging from AC and DC potentiometers?
7. What are the applications of potentiometer?
8. What is proportional controller?
9. What are the advantages of proportional controllers?
10. What is the drawback in P-controller?
11. What is integral control action?
12. Define PI-controller?
13. Define PD-controller?
14. Define PID-controller?
15. State the advantages of integral controller.
16. State the disadvantages of integral controller.
17. State the advantages of derivative controller.
18. State the disadvantages of derivative controller.
19. Write the transfer function of P, PI, PD and PID controllers. (any two)
20. What is reset rate?
21. Why derivative controller is not employed in isolation?
22. Draw the electronic P-controller.
23. Draw the electronic PI-controller.
24. Draw the electronic PD-controller.
25. Draw the electronic PID-controller.
26. What is a servomotor?
27. What are the characteristics of servomotor?
28. Compare the AC and DC servomotor?
29. State the advantages of permanent magnet DC motor.
30. Give the various classification of DC motor.
31. What are the special features of DC servomotor?
32. What is the difference ranging from AC servomotor and two-phase induction motor?
33. What are the various kinds of rotors used in AC servomotor/
34. What is Stepper motor?
35. What are the various kinds of stepper motor?
36. What is full-step, half-step and micro-step?
37. What is a tachogenerator?
38. Compare the DC and AC tacho.
39. Why gear trains are used in control system?
40. What is gear ratio?
41. What is Gyroscope?
42. What are the basic kinds of gyros?
43. What is free gyro?
44. What are the applications of gyroscope?
45. What is rate gyro?
46. What is integrating gyro?

PART-B
1. Derive the transfer function of Potentiometer.
2. Explain in detail the application of potentiometer as fault detector.
3. Derive the transfer function of armature controlled DC motor.
4. Derive the transfer function of field controlled DC motor.
5. Discuss briefly about DC servomotor.
6. Discuss briefly about AC servomotor.
7. Discuss briefly about stepper motor.
8. Derive the transfer function of DC and AC tachogenerator.
9. Discuss briefly with diagrams about Gyroscope.
10. Derive the torque formula of the gear train with reference to motor shaft.
11. Derive the torque formula of the gear train with reference to load shaft.
12. Explain the P-controller with electronic version using op-amp in detail.
13. Explain the PI-controller with electronic version using op-amp in detail.
14. Explain the PD-controller with electronic version using op-amp in detail.
15. Explain the PID-controller with electronic version using op-amp in detail.

Earning:   Approval pending.