Implementing fuzzy control systems using VHDL and statecharts

In this paper, we propose an approach for designing fuzzy controllers. To reduce design time, we employ two high-level design methods: VHDL and VHDL-based logic synthesis, and Statecharts with a VHDL backend for graphical design description. A fuzzifier and a defuzzifier parts of a fuzzy control system are captured in VHDL, as these parts perform complex arithmetical operations. A rule base of the controller is described in Statecharts, and then is translated into VHDL. A complete description of the system is assembled in VHDL, and is synthesized using VHDL-based logic synthesis. The efficiency of the generated hardware is explored for FPGA technology