Implementation of Digital PID controller in Field Programmable Gate Array (FPGA)

Proportional integral derivative (PID) controller is the most preferable controller in industries that does not require precise analytical model of the system to be controlled. Implementation of PID controllers has gone through several stages of evolution from the early mechanical and pneumatic designs to the microprocessor based systems. Recently ldquoField Programmable Gate Arrayrdquo has become an alternative solution for the realization of Digital PID controllers. This work is aimed at the implementation of serial, parallel and mixed PID controller architectures using FPGA. The digital PID so designed is based essentially in architectures including multipliers, adders and some other logic circuits.