Using Data to Develop a FOPDT

[@matheusdiniz2846]

Good Night, I’m a student of Computer Engineering here in Brazil and I’m taking this class, given that I’m trying to learn different things to complement my knowledge. Is there any way to find a transfer function or estimate other ways to find PID values based on data ( by hand or Matlab) ? Where can I find papers about estimating based on data ? Thank you so much !

[@prabuskleo]

Who is proposed this approximation method?. .can you give me the reference paper!

[@icepickkk]

hey thanks for your explanation. i dont get what the K is. you said that K is the steady state gain of the system, and it is equal to the change in the output divided by the change in the input. i dont understand what is the meaning of "the change in the input". i mean how did you get 1.2gpm on your data? thanks

[@LearnChemE]

The change in the input is the step change, or 1.2 gpm.

[@ayushsaxena7770]

Sir please tell me the reference book you used for this topic because I didn't find this is coughnowr or stephanopolos. Thanks

[@komailkadhem]

I have taken a similar topic in a process modeling course. The Textbook name was "Seborg D.E., Edger T.F., Mellichamp D.A and F.J Doyle, III, Process Dynamics and Control, Wiley, 3rd edition, 2010"

[@lemonan5244]

to find K why is it (initial-final) output/(final-initial) input?

[@LearnChemE]

Thanks for you question. K is the steady state gain of the system, and it is equal to the change in the output divided by the change in the input. This is just by definition, so there is no derivation involved here. Hopefully this helps!

[@ennkhaan]

@@LearnChemE But then why the -ve value? Is the step change in opposite direction?

[@rinkiaryaiitr5546]

Sir please tell me the book name of that topic.. This topic I didn't get anywhere 🙏

[@komailkadhem]

I have taken a similar topic in a process modeling course. The Textbook name was "Seborg D.E., Edger T.F., Mellichamp D.A and F.J Doyle, III, Process Dynamics and Control, Wiley, 3rd edition, 2010"

[@rinkiaryaiitr5546]

@@komailkadhem thanks ..can u provide the pdf of that book.,if u have it?

[@komailkadhem]

@@rinkiaryaiitr5546 yes I have it but how can I send it to u?

[@rinkiaryaiitr5546]

Yes now I got this book Thanku so much 😊

[@komailkadhem]

@@rinkiaryaiitr5546 u r wlc