What is PID Controller ?

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Accepted Answer

PID Controller is a feedback control loop mechanism used in industrial control systems.

PID stands for Proportional, Integral, and Derivative.
It continuously calculates an error value as the difference between a desired setpoint and a measured process variable.
The controller then adjusts the process control inputs to minimize the error and bring the process variable closer to the setpoint.
It is widely used in industries such as manufacturing, chemical processing, and power generation.
Example: A PID controller can be used to maintain a constant temperature in a chemical reactor by adjusting the flow rate of a heating or cooling fluid.