Is there a way to know the PID gain value used in the controller with input and output data ?

Question

junsang Kim 2021-10-3

回答： Siddharth Jawahar 2021-10-26

I only know the input data of the pid controller and the output data obtained through the controller.

is there a way using Matlab to find out what P gain, I gain, and D gain the system used to bring the above output data ?

Mathieu NOE 2021-10-4

hello

maybe if you are lucky you can try to make a transfer function estimate (using tfestimate) between the output and input time vectors.

then you can do a frequency match of this tfe with the transfer function of the PID and try fit the P,I,D gains

Answer 1

Siddharth Jawahar 2021-10-26

Hi Junsang,

You can do just this using the parameter estimation app in Simulink Design Optimization with measured data. PLease see an example here:

HTH,

Sid