Digital implementation of a programmable type-2 fuzzy logic controller

This paper presents the design of a digital CMOS integrated circuit implementing a type-2 fuzzy logic controller. The proposed architecture is suitable for serial processing of fuzzy rules combined with parallel processing of upper and lower membership functions of type-2 fuzzy sets. The parameterized VHDL model allows to synthesize the circuit of the required size for a particular application. Moreover, on-chip programming is performed.