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    Question Paper Code:: Reg. No.

    Uploaded by

    Vinay
    This document contains an exam paper for a control systems engineering course. It includes 15 multiple choice and numerical questions testing various control systems concepts. The questions cover topics such as open vs closed loop systems, transfer functions, stability analysis using Routh-Hurwitz and Nyquist criteria, time and frequency response analysis, root locus, state space representations, and state controllability and observability. The exam paper tests students' understanding and application of key mathematical techniques for modeling, analyzing, and designing control systems.

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    Question Paper Code:: Reg. No.

    Uploaded by

    Vinay
    45 views3 pages
    This document contains an exam paper for a control systems engineering course. It includes 15 multiple choice and numerical questions testing various control systems concepts. The questions cover topics such as open vs closed loop systems, transfer functions, stability analysis using Routh-Hurwitz and Nyquist criteria, time and frequency response analysis, root locus, state space representations, and state controllability and observability. The exam paper tests students' understanding and application of key mathematical techniques for modeling, analyzing, and designing control systems.

    Original Description:

    anna university question bank

    Original Title

    EC2255 NOV-DEC 2010

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    This document contains an exam paper for a control systems engineering course. It includes 15 multiple choice and numerical questions testing various control systems concepts. The questions cover topics such as open vs closed loop systems, transfer functions, stability analysis using Routh-Hurwitz and Nyquist criteria, time and frequency response analysis, root locus, state space representations, and state controllability and observability. The exam paper tests students' understanding and application of key mathematical techniques for modeling, analyzing, and designing control systems.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    45 views3 pages

    Question Paper Code:: Reg. No.

    Uploaded by

    Vinay
    This document contains an exam paper for a control systems engineering course. It includes 15 multiple choice and numerical questions testing various control systems concepts. The questions cover topics such as open vs closed loop systems, transfer functions, stability analysis using Routh-Hurwitz and Nyquist criteria, time and frequency response analysis, root locus, state space representations, and state controllability and observability. The exam paper tests students' understanding and application of key mathematical techniques for modeling, analyzing, and designing control systems.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
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    Reg. No. :


    B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
    Fourth Semester
    Electronics and Communication Engineering
    EC 2255 CONTROL SYSTEMS
    (Regulation 2008)
    Time : Three hours Maximum : 100 Marks
    (Graph Sheets, Semi log sheets and polar charts are to be provided)
    Answer ALL questions
    PART A (10 2 = 20 Marks)
    1. Give the comparisons between open loop system and closed loop system.
    2. Define the transfer function of a system.
    3. What is meant by peak overshoot?
    4. What is meant by steady state error?
    5. List the advantages of Nichol's Chart?
    6. What are the specifications used in frequency domain analysis?
    7. What is meant by BIBO stability?
    8. Using Routh criterion, determine the stability of the system represented by the
    characteristic equation 0 5 16 18 8
    2 3 4
    = + + + + S S S S . Comment on the location
    of the roots of characteristics equation.
    9. What is meant by sampling theorem?
    10. Mention the need for state variables?
    Question Paper Code : 64027
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    64027 2
    PART B (5 16 = 80 Marks)
    11. (a) (i) The transfer function of a system is given by,
    ( )
    ( )
    ( )( )( ) 12 7 5 2
    6
    2
    + + + +
    +
    =
    s S s s s
    s K
    s T Determine
    (1) Poles
    (2) Zeros
    (3) Characteristics equation
    (4) Pole-zero plot in s-plane. (8)
    (ii) Find
    ( )
    ( ) s R
    s C
    for the signal flow graph shown below. (8)

    Or
    (b) (i) Reduce the block diagram to its canonical form and obtain
    ( ) ( ). s R s C (10)

    (ii) Give the comparison between block diagram and signal flow graph
    methods. (6)
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    64027 3
    12. (a) The open loop transfer function of a unity feedback system is given by
    ( ) ( ) 1 + = sT s K s G , where K and T are positive constant. By what factor
    should the amplifier gain K be reduced, so that the peak overshoot of unit
    step response of the system is reduce from 75% to 25%. (16)
    Or
    (b) Explain in detail the system response with, PI, PD and PID controllers.
    (16)
    13. (a) Sketch Bode plot for the following transfer function and determine the
    system gain K for the gain cross over frequency to be 5 rad/sec
    ( )
    ( )( )
    2
    1 0.2 1 0.02
    Ks
    G s
    s s
    =
    + +
    . (16)
    Or
    (b) The open loop transfer function of a unity feedback system is given by
    ( )
    ( )( ) s s s
    s G
    2 1 1
    1
    2
    + +
    = . Sketch the polar plot and determine the gain
    margin and phase margin.
    14. (a) Sketch the root locus of the system whose open loop transfer function is
    ( )
    ( )( ) 4 2 + +
    =
    s s s
    K
    s G . Find the value of K, so that the damping ratio of the
    closed loop system is 0.5. (16)
    Or
    (b) Construct the Nyquist plot for a system whose open loop transfer
    function is given by ( ) ( )
    ( )
    3
    2
    1
    S
    S K
    s H s G
    +
    = . Find the range of K for
    stability. (16)
    15. (a) (i) Explain in detail the state space representation for continuous time
    systems. (8)
    (ii) Explain in detail the state space representation for discrete time
    systems. (8)
    Or
    (b) Determine the state controllability and observability of the system
    described by u x x

    =
    1 2
    0 0
    1 0
    1 0 0
    1 0 1
    1 1 3
    x y

    =
    0 1 1
    1 0 0
    . (16)

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