PID stand for Proportional, Integral, Derivative. This is a mathematical way to control something physical. Some examples include: maintaining a drones altitude, the cruise control on your car, thermostats, and much more!
In this scene you have the controls to what I basically consider a 1 dimensional drone. By changing the gain and max values you can change the way the drone reaches its target. What really interested me initially was the fact that the thruster has no idea how much the drone weighs, but with this control method it is able to hover.
I highly recommend watching this YouTube video to get a better understanding of how this all works.
https://www.youtube.com/watch?v=wkfEZmsQqiA
https://en.wikipedia.org/wiki/PID_controller
For any issues or questions please let me know
