How to know the gain value used in this controller when I know the input and output of the pid controller

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junsang Kim 2021년 10월 5일

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https://kr.mathworks.com/matlabcentral/answers/1467081-how-to-know-the-gain-value-used-in-this-controller-when-i-know-the-input-and-output-of-the-pid-contr

답변: Christopher McCausland 2021년 10월 5일

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

How can I know the gain value used in this controller when I know the input and output of the pid controller

After using tfestimate function, I wonder what to do next in details

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Answer 1

Christopher McCausland 2021년 10월 5일

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https://kr.mathworks.com/matlabcentral/answers/1467081-how-to-know-the-gain-value-used-in-this-controller-when-i-know-the-input-and-output-of-the-pid-contr#answer_801996

Mathematically speaking gain is the output divided by the input of a system. The next question is if this produces a linear or non-linear response. If you know the topology of the PID controller you should be able to generate the complete transfer function and work from there.