What is PID controller in control system? All Questions › Category: Control System › What is PID controller in control system? 0 Vote Up Vote Down Chetan Shidling asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down Chetan Shidling answered 4 years ago PID controller is used in industrial control system to make corrections in the output if there is a difference between the desired value and measured value based on proportional, integral, and derivative.