Hello i am reading about step response for tuning PID but i do not understand it , can someone give me some simple explanation of what it is please , in a comprehensicve way

 

Step response means that you disturb the system with a step function, i.e. attempting to move from a stable condition to a value above or below the previous stable condition in the shortest time possible.

This will assess the ability of the system to respond to a perturbation.
The "D" (derivative) in the PID algorithm is primarily responsible for minimizing the overshoot and oscillations in the response.

Reference: https://en.wikipedia.org/wiki/Step_response

 

Step response means that you disturb the system with a step function, i.e. attempting to move from astable condition to a value above or below the previous stable condition in the shortest time possible.

This will assess the ability of the system to respond to a perturbation.
The "D" (derivative) in the PID algorithm is primarily responsible for minimizing the overshoot and oscillations in the response.

Reference: https://en.wikipedia.org/wiki/Step_response


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so step response tuning operation , in a nutshell , how is it done ?

 

Step response tuning means exactly that.
You excite the system with a step function and measure and analyze the system's response to the step function.
You adjust P, I, and D parameters to minimize overshoot, oscillation, and settling time.

 

Some links. The last two do not include a lot of math:

https://www.slideshare.net/isa_interchange/pid-controller-auto-tuning-based-on-process-step-response
https://en.wikipedia.org/wiki/PID_controller (tuning and critical damping)
https://www.pidtuning.net/fivedeadl...MImoH38q-J6wIV9R6tBh2Nogf7EAMYASAAEgLegfD_BwE
https://www.mathworks.com/videos/un...d-automatic-tuning-methods-1533639047484.html (less math)

 

Note that however you enter the step impulse, just make sure it's connection doesn't affect the loop dynamics or response of the feedback loop.