temperature control using fuzzy logic

riki35 · ‎03-29-2015

Hello I am building a temperature control system using Fuzzy PID, I am building a self tuning PID gains by a fuzzy logic algorithm, but the problem I know the rules for the parameters of PID but dn't know the approximate range in membership of each output . does any one have a small example jst to explain or help me determine the values knowing that I dn't have a real transfer function of the heater

Rscd27 · ‎03-30-2015

Hello, Can you give more informationa about the software you are using? Are you using the fuzzy logic toolkit?

Randy @Rscd27@

riki35 · ‎03-30-2015

thank you so much for replying ,yes I'm using the fuzzy logic toolkit

I'm trying to control the temperature of a heater(1st order system), using the fuzzy logic in labview to tune the PID parameters (kp,ki and kd) I know the rules to be used but I could not determine the member ship functions ranges. knowing that I will send the output of the fuzzy logic by the opc server to the PID of the PLC siemens s7 300 . if u can give me some advice or small example how ti tune a basic example that will be nice

again thanx for ur help 🙂

lucaso3 · ‎03-31-2015

Hi riki35,

I hope you are having a great day. I was reviewing your question and I gather several links that might help you obtain valuable information to accomplish what you would like to obtain. These links are the following:

http://zone.ni.com/reference/en-XX/help/370401H-01/lvpidmain/creating_memfuncs/#moremfs

http://zone.ni.com/reference/en-XX/help/370401G-01/lvpid/defuzzification_methods/

http://www.ni.com/pdf/manuals/372192d.pdf

https://decibel.ni.com/content/docs/DOC-16557

I really hope you can find the information valuable.

Luis C.

Applications Engineer.