Proportional-Integral-Derivative controllers are widely used in automation systems. They are usually implemented either in hardware using analog components or in software using computer-based systems. In this paper, we focused our work on performance analysis and implementation of digital controller based on Field Programmable Gate Array device. In proposed system implementation of software module using ‘VHDL’ for Xilinx FPGA (XC3S400) based PID controller for temperature control system is presented. FPGA based system allows design up gradation in the field with no hardware replacement. FPGA is a superior alternative to mask programmed ASICS. It also offers good closed-loop performance while using less resource which results in cost reduction with high speed and low power consumption, this is desirable in embedded control applications. Keywords—Field Programmable Gate Array (FPGA); Proportional-Integral-Derivative (PID) controller; Very High Speed Integrated Circuit Hardware Description Language (VHDL); Pulse Width Modulation (PWM); Application Specific Integrated Circuits (ASICS).
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