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**B.E./B.Tech.Degree Examinations, April/May 2011**

**Regulations 2008**

**Fourth Semester**

**Electronics and Communication Engineering**

**EC 2255 Control Systems**

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**ANNA UNIVERSITY SYLLABUS: CLICK HERE**

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**Part A - (10 x 2 = 20 marks)**

1. Define open-loop and closed-loop control systems.

2. Write down the transfer function of the system whose block diagram is shown below.

3. How a control system i s classified depending on the value of damping?

4. Why derivative controller is not used in control system?

5. What i s meant by `Corner frequency' in frequency response analysis?

6. Draw the circuit of lead compensator and draw its pole zero diagram.

7. State the rule for obtaining the breakaway point in root locus.

8. Define stability of a system.

9. Name the methods of state space representation for phase variables.

10. What i s meant by quantization?

**Part B - (5 x 16 = 80 marks)**

11. (a) (i) Consider the mechanical system shown below. Identify the variables and write

the di®erential equation. (6)

(ii) Draw the torque-voltage electrical analogous circuit for the following mechanical

system shown . (4)

(iii) Obtain the transfer function of the following electrical network. (6)

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