[SciPy-User] Wrong Step Response
Fabrice Silva
silva at lma.cnrs-mrs.fr
Wed May 23 06:16:05 EDT 2012
> The integrator is used to reduce the overall error of the response so that it
> reaches the constant steady state 1.
> The low-pass is used to reduce the overshoot caused by the integrator.
> If i didn't get it wrong in the control engineering class.
> Probably have to check the notes again and run thru the MATLAB script again.
>
> The response of TA1.jpg was made during a Lab (control engineering) at
> University and the Prof checked it.
Are you sure you are not confusing the step response of a transfer
function with the step response of a looped system containing an
integrator ?
Once you close the loop, the global transfer function is not the one you
mentionned but
H = G/(1+G)
for a unity feedback (for example), which exhibits the oscillation and
the unity steady state.
What you did in your control engineering classes may be the closed-loop
system...
--
Fabrice Silva
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