Open and closed loop system

Discussion in 'Homework Help' started by mo2015mo, Mar 19, 2014.

  1. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    Hi my friends .. :)

    While I were studying Control laboratory, i faced this question
    Which of the following responses(as attached photo) represent closed loop or open loop system?? and which with magnetic brake or without magnetic brake ??

    I answered them as
    (a) closed loop without magnetic brake
    (b) closed loop with magnetic brake
    (c) open loop without magnetic brake
    (d) open loop with magnetic brake

    Are these answers Correct?? and Is there any reference help me to know more information about that??
     
  2. LvW

    Active Member

    Jun 13, 2013
    674
    100
    What kind of "responses"? Time or frequency domain?
    What is on the horizontal resp. verticale axes?
    I only can guess.
     
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  3. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    Time domain response for speed control system
     
  4. BytetoEat

    New Member

    Mar 5, 2014
    25
    5
    theres not enough information to say what kind of system that is. what is that box?
     
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  5. crutschow

    Expert

    Mar 14, 2008
    12,991
    3,227
    Without knowing the vertical axis values for both traces, it's not really possible to give an informed answer.
     
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  6. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    okay,, assumed that step-input for all (drawn that by red color),,
    taken values on vertical axis for all by inspection
     
  7. crutschow

    Expert

    Mar 14, 2008
    12,991
    3,227
    What?:confused:
     
  8. LvW

    Active Member

    Jun 13, 2013
    674
    100
    mo2015mo, can you please explain WHY do you think (see your first posting) that the responses in c) and d) are for a system with open loop?
     
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