Programmable fuzzy logic controller circuit on CPLD chip

This paper presents design of a programmable fuzzy logic controller and its implementation on a complex programmable logic device (CPLD) chip. This digital fuzzy logic controller (FLC) can be reconfigured in term of its antecedents or membership function parameters, fuzzy implication rules, and consequence parameters. Due to its programmable capability, this digital FLC is intended to be a general-two-dimensional fuzzy controller for several application areas. The digital FLC circuit is designed to be as flexible as possible, and thus the user finds it easy to utilize the FLC in control applications, which need real-time operations. The digital FLC is implemented on a CPLD chip using a VHDL-based synthesis model.