A Three-Domain Fuzzy Process Control System

A three-domain fuzzy logic control (3D FLC) is presented for controlling the distributed parameter system (DPS). Different to the traditional FLC, the 3D FLC deals with three-dimensional fuzzy set (3D fuzzy set), i.e. the traditional fuzzy set plus spatial dimension. The proposed FLC still consists of defuzzification, rule inference, and defuzzification. Different to the traditional FLC, the 3D FLC can fuse information measured from space domain into a spatial membership function, and then rules will not increase as sensors increase for spatial measurement. Therefore, the 3D FLC has the capability to handle spatial information. Application of the 3D FLC is presented for a catalytic packed-bed reactor to show the effectiveness of the new fuzzy controller design, and comparisons with the traditional fuzzy controller are also given