What is PID control?

PID control stands for Proportional-Integral-Derivative control, which is a widely used control loop feedback mechanism in industrial control systems. This control method utilizes three distinct actions to maintain the desired output level by continuously adjusting the control input.

The proportional component responds to the current error, which is the difference between the desired setpoint and the current process variable. The integral component addresses past errors by summing them over time, allowing it to eliminate the residual steady-state error that occurs with the proportional response alone. Lastly, the derivative component anticipates future errors based on the rate of change of the error, which helps to dampen the system's response and enhance stability.

This combination makes PID control highly versatile and effective in a variety of applications, such as temperature control, pressure control, flow control, and more. It is particularly beneficial in processes that require precise control, quick response to changes, and the ability to handle disturbances effectively.