What are the gains

PID Tuner Forum Forums PID Tuner Help What are the gains

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  • #91
    cacique
    Participant

    Here is my project

    https://pidtuner.com/#/5VbD5Zx5jQ

     

    My controller takes the Integral in repeats per secs, do i just take the inverse of the Integral time? Or do i enter the integral gain? whats the units on the integral gain?

    Another question, when inputting the data, what is the units for the time column, secs, minutes? does it matter?

    #92
    pidtuner
    Keymaster

    Hi,

    Time is always in seconds. If your PID implementation is non-standard, you are responsible of converting the PID gains to the non-standard time frame used by your PID.

    Same goes with the gains. The PID Tuner shows both Integral Gain and Integral Time because in industry either one or the other are standard. So if your PID accepts some custom transformed Integral term, you are responsible for converting it to your special PID form.

    I have been working on a presentation that I will officially release soon, hopefully with a video. Maybe this will help you clarify some practical concepts:

    https://www.dropbox.com/scl/fi/sfkz7xx7eqg7uyzu5zpwn/PID-Tuner.pptx?dl=0&rlkey=p0l03h6x6vhexmsbjhyuyqiy6

     

    #132
    Le_marco
    Participant

    Hi,

    Thanks for this tool. It is really easy.

    Concerning the last step “Tune Pid” when we can apply different PID gains and see result on the curve, I would like some informations to better understant theses 5 values.

    Where theys come from these 5 values ? and what are they exactely : Kp, Ti, Td, I, D ?

    Can you explain me why you don’t have only the 3 values, like any usual PID : P, I, D values.

    Can you give me the formula showing these gains parameters.

    Thanks

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