PID Controllers

A Proportional-Integral-Derivative controller, is a type of feedback control system widely used in industrial and process control applications to regulate and maintain desired setpoints by continuously adjusting a control signal based on the error between the setpoint and the actual process variable.

They used a branch of mathematics called control theory to calculate the control signal, optimizing the system's response and reducing errors, especially steady state and overshoot errors.

The controller is based on 3 terms:

  • Proportional
  • Integral
  • Derivative