🌐

IoT Lab content is currently available in Arabic only. We're working on an English version.

PID Control Algorithm | NexaLearn IoT Lab | NexaLearn

Robotics30 دقيقة

PID Control Algorithm

How do drones maintain their balance? Understanding the math behind smooth movement.

Lesson Content

PID stands for Proportional, Integral, Derivative. It is a feedback control system. The robot reads its error (e.g., how far it is from the center of the black line). - P guides it to correct quickly based on the current error magnitude. - I corrects accumulated errors over time (if the robot drifts slightly due to a wheel imbalance). - D predicts the rate of change to ease braking before reaching center, preventing oscillation.

Components Needed

نظري/متقدم

Code Example

float error = setPoint - currentPosition;
float P = Kp * error;
I = I + (Ki * error);
float D = Kd * (error - lastError);
float output = P + I + D;
lastError = error;
// استخدم output لضبط سرعة المحركات

Common Mistakes

Setting a high Kp constant that causes the robot to oscillate violently and lose the line entirely. Tuning the constants is an art that requires trial and error.

Next Lesson

Introduction to PCB Design