FPGA Realization of Fuzzy Temperature Controller for Industrial Application

This paper describes FPGA realization of a Fuzzy Temperature Controller (FTC) using VHDL intended for industrial application. The system is built up with four major modules namely fuzzification, inference, implication and defuzzification. The composition method selected for the fuzzy model is the MaxMin composition while the Mamdani Min operator is chosen as the implication method. Each module is modeled individually using behavioral VHDL, and the combined using structural VHDL. Successful timing and functional simulations are carried out to verify the correct functionality of the algorithm. The verified VHDL model is synthesized using synthesis tool to get gate-level architecture of the FTC chip. The designed synthesized netlist is downloaded into FPGA board from Altera for verifying the functionality of the FTC chip. The operating frequency of the FTC chip is 5MHz with a critical path of 199.3ns. Key-Words: VHDL, Temperature controller, Fuzzy, Synthesis, FPGA