How to find the steady-state error for this response in Matlab?

Discussion in 'Homework Help' started by ASToonBlue, Apr 17, 2017.

  1. ASToonBlue

    Thread Starter New Member

    Mar 19, 2016
    8
    0
    I have calculated my transfer function and plot the following response using the command step in MATLAB
    This is what I get in MATLAB
    upload_2017-4-17_16-16-57.png

    So from this diagram , it shows that the steady state value is 4.26 but how do I find the steady-state error ?
     
  2. MrAl

    AAC Fanatic!

    Jun 17, 2014
    5,898
    1,255
    Hi,

    In any language the steady state error will be the response at t=infinity minus the set point. So if your target set point is 2.000v and your response at t infinity is 1.999v, then your steady state error is -0.001 volt. You might also express this as a percentage of the output.
     
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