CONTROL SYSTEM - 2012 (A)

2012•Semester 3•Civil-CA•End Semester
Aryabhatta Knowledge University
2012 (A)

CONTROL SYSTEM

Time: 03 HoursCode: 102415Full Marks: 70

Instructions:

  1. The marks are indicated in the right-hand margin.
  2. There are TEN questions in this paper.
  3. Attempt any FIVE questions.
Q.1 Solve both questions :[14]

  1. What is servomechanism? Differentiate between open-loop and closed-loop control system.

  2. Obtain the transfer function of the block diagram shown in Fig 1.

    Question Diagram
Q.2 Write technical notes on any two of the following:[14]

  1. (a) LVDT
    (b) Strain gauges
    (c) CRO
    (d) Hygrometer

Q.3 Solve this question :[14]

  1. What is the principle of measuring pressure by elastic transducers? Discuss the elastic diaphragms for the measurement of pressure. Give the examples of secondary transducers used with diaphragms.

Q.4 Solve this question :[14]

  1. For the system shown in Fig. 2 given below, find the transfer function \( X(s)/F(s) \) where symbols have their usual meanings.

    Question Diagram
Q.5 Solve both questions :[14]

  1. Analyse the time response of second-order system.

  2. Define rise time, peak time, settling time and peak overshoot.

Q.6 Solve both questions :[14]

  1. What is transducer? Distinguish between the active and passive transducer.

  2. Describe the operating principle of piezoelectric pickups.

Q.7 Solve this question :[14]

  1. Draw a neat sketch of an orifice meter. Derive an expression of flow rate and state its advantages over venturi meter.

Q.8 Solve both questions :[14]

  1. Describe the construction and working of thermocouples. Describe the thermo-electric laws and their applications.

  2. Draw the block diagram of electronic counter and explain its working.

Q.9 Solve both questions :[14]

  1. Describe the construction and working of hot-wire anemometer.

  2. How are frequency and phase of a signal measured using CRO?

Q.10 Solve both questions :[14]

  1. Explain the stability of control system with the help of Routh-Hurwitz criterion.

  2. The characteristic equation of a system is \( s^{5}+4s^{4}+8s^{3}+8s^{2}+7s+4=0 \). Determine if the system is stable.