what is PID controller?

Question

Accepted Answer

A PID controller is a feedback control loop mechanism widely used in engineering to control systems and processes.

PID stands for Proportional-Integral-Derivative.
It continuously calculates an error value as the difference between a desired setpoint and a measured process variable.
The controller then adjusts the control signal to minimize the error and bring the process variable closer to the setpoint.
The proportional term provides an immediate response to the error, the integral term eliminates steady-state error, and the derivative term helps in reducing overshoot and oscillations.
PID controllers are commonly used in various applications such as temperature control, speed control, and robotics.
Example: A PID controller can be used to maintain a constant temperature in an oven by adjusting the heating element based on the difference between the desired temperature and the current temperature.

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