proportional control, integral control, differential control
A form of control based on the three basic types of control: proportional, integral and differential control. PID Controllers are created by combining P, I and D elements to get the desired control characteristic.
PID controllers are realized by using one proportional, integral and differential controller each in parallel. All three controllers receive the same input; their outputs are added to form the compound output of the PID controller.
PID control can be and has been implemented in many technical forms throughout its history, from relays to microprocessors.
PID controllers are very common; about 90 to 95% of all control problems can solved by this controller [7]. There are a number of techniques to build PID controllers with adaptable parameters, increasing their usefulness even further [7]. (adaptation)