Approximate FOPDT Dynamics with Graphical Fit
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- Опубликовано: 8 сен 2024
- Dynamic processes are often characterized by a gain (Kp), time constant (tau), and dead time (theta). These exercises use a graphical fitting method to estimate the three characteristic parameters of the following dynamic systems described by a first-order linear system with time delay. See apmonitor.com/p...
Have you ever used a Sine Sweep for system identification?
That is another great way to generate data for system identification, especially for systems that have fast dynamics.
What if you are given the time constant, and you’re asked to find the dead time?? But you don’t know t_0.632, however, you know what y equals at that time. But you don’t have a function for y(t)…you just have a transfer function written as “Kexp(-theta*s)/(tau*s+1)”? I’ve calculated K and tau, and all i know is there is a unit step of 10 and it takes 20 minutes to reach the new steady state. And the problem is asking for theta…
Here is additional help on graphical fit: apmonitor.com/pdc/index.php/Main/FirstOrderGraphical and optimized fit: apmonitor.com/pdc/index.php/Main/FirstOrderOptimization
could you please say why the number is exactly 0.632? how do we get it?
Here is more information on why 63.2% apmonitor.com/pdc/index.php/Main/FirstOrderSystems
Please for problem what is true?
Teta p = 1,2 or teta p = 2,2?
For problem #1 it is 1.2 for the delay time. It starts from the step change.
You said the dead time is 1.2 secs and then when calculating for Tau p, you said dead time is 2.2.
Thanks for catching that.
For problem 3, wouldn't the (Delta)Y*0.632=3.16, not 8 something??
Please see the comments starting at 11:52. It is (Delta)Y * 0.632 as I mentioned in the video. The answer that I show is correct.
need Schrodinger equation solved by Python. Can you upload for us
This should help you: github.com/jakevdp/pySchrodinger There are many packages for Python and I haven't tested this one.
thank you, but it does not contain vedio lecture
+Jeyaneepan Kanagaratnam, perhaps you could contact the author of the package if you can't get the details that you need from the documentation.