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Re: How Tune PID in octave using Frequency Response data
From: |
Nicklas SB Karlsson |
Subject: |
Re: How Tune PID in octave using Frequency Response data |
Date: |
Fri, 24 Jul 2020 16:36:35 +0200 |
> Hello,
>
> I have the frequency response data of a plant. What steps would I take to
> tune a PID in octave?
>
> Thanks,
> Stephen
For tuning there are several options, Ziegler-Nichols method is one but it
might be better to do some mathematical analysis on how your gains effect the
bode plot of the closed system. Noise may also be a problem if you do not want
this to enter control loop, integral gain is least sensistivity for noise,
proportional gain in between and derivative gain most sensitive to noise.
Usually there is a choice between noise entering control loop, it may also make
audible noise and speed. Charging batteries is a slow process while unstable
processes like inverted pendulum must be fast enough to stabilized pendulum.
The tuned system may be checked with nyquist(...) by closing the control loop
with your PID regulator. You probably want to check phase and amplitude
margins, maybe also sensitivity.
System may be closed by transfer function if you have this but as I understand
it you have frequency response. You may calculate frequency response of your
PID regulator with bode(...) function and use numeric calculations on
amplitudes and phases for your PID regulator and frequency response of plant.
If do not know how to make these calculations I might try to get an hour or so
thinkging about it and help you.
Nicklas SB Karlsson
- How Tune PID in octave using Frequency Response data, shall689, 2020/07/24
- Re: How Tune PID in octave using Frequency Response data, Sergei Steshenko, 2020/07/24
- Re: How Tune PID in octave using Frequency Response data,
Nicklas SB Karlsson <=
- Re: How Tune PID in octave using Frequency Response data, shall689, 2020/07/24
- Re: How Tune PID in octave using Frequency Response data, N, 2020/07/27
- Re: How Tune PID in octave using Frequency Response data, shall689, 2020/07/28
- Re: How Tune PID in octave using Frequency Response data, N, 2020/07/28
- Re: How Tune PID in octave using Frequency Response data, N, 2020/07/28
- Re: How Tune PID in octave using Frequency Response data, Torsten Lilge, 2020/07/28
- Re: How Tune PID in octave using Frequency Response data, N, 2020/07/28
- Re: How Tune PID in octave using Frequency Response data, Torsten Lilge, 2020/07/29
- Re: How Tune PID in octave using Frequency Response data, Torsten Lilge, 2020/07/24