KEY TERMS IN PID BASED LINE FOLLOWING:
PID stands for Proportional, Integral and Derivative. In this tutorial, I am taking a few peeks at Pololu's documents. As stated there :
· The proportional value is approximately proportional to your robot’s position with respect to the line. That is, if your robot is precisely centered on the line, we expect a proportional value of exactly 0.
· The integral value records the history of your robot’s motion: it is a sum of all of the values of the proportional term that were recorded since the robot started running.
The derivative is the rate of change of the proportional value.