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Step response time of control system

  1. Aug 5, 2014 #1
    1. The problem statement, all variables and given/known data
    I'm having a slight problem with the question below.

    A temperature control process has a first-order response with a step response time of 12 seconds. In selecting a temperature sensor for the control system for the process, for what maximum value of sensor time-constant would you be looking?

    My question is what is step response time?


    2. Relevant equations



    3. The attempt at a solution

    Is it the time the process reaches its maximum value, if so then would the time constant (of the process) be
    t = 12/5 =2.4 s

    Thanks
    Mick
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 5, 2014 #2
  4. Aug 5, 2014 #3

    donpacino

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    Gold Member

    That is the settling time of the step response.

    The step response is how a system responds to an instantaneous change in input.

    there are a few other attributes of a step response such as rise time and percent overshoot.
     
  5. Aug 5, 2014 #4

    donpacino

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    Gold Member

    I believe your solution is correct
     
  6. Aug 5, 2014 #5
    Thanks for the replies, they have helped me understand what is going on.

    Thanks again

    Mick
     
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