PID Loops

[Pirobots_J.G]

Hey I’m a beginner programmer having trouble learning PID loops any help please? I would just like a brief crash course of how it works and some examples would be amazing.

[tabor473]

@tabor473

So a P controller is really what you need most of the time. P stands for proportional.

My favorite explanation is
motor =kp*(where I want to be -where I am) If your very far away from the goal you apply full power while if your very close you apply only a little bit of power.
kP is just a unit conversion like feet to inches. It converts sensor values to motor values. The official method for finding the unit conversion is really just starting at 0 and making it bigger until it works.

This applied to raising an arm could be something like
motor[armMotor]=.2(goalLocation-sensorValue[Pot]);

Here is my favorite guide for an in depth understanding of all of PID. Written by one of the forum members here.

Documents

[Pirobots_J.G]

@tabor473

This applied to raising an arm could be something like
motor[armMotor]=.2(goalLocation-sensorValue[Pot]);

Here is my favorite guide for an in depth understanding of all of PID. Written by one of the forum members here.

http://georgegillard.com/documents/2-introduction-to-pid-controllers

Thank you very much so when u talk about converting sensor values I imagine I gain the sensor values from sensors as in a potentiometer to tell the robot when to stop and when to actually start.

[MartinMaVEXForever]

Here you go – step by step walkthrough on how to make a PID target control function.

[Pirobots_J.G]

@MartinMaVEXForever

https://www.youtube.com/playlist?list=PLCozfyh08FMgbZWeTbGOMw7o3biDlnvec

Here you go – step by step walkthrough on how to make a PID target control function.

Thanks! Hey what do you use for programming for robotc?