Integrated fuzzy logic controller with continuous processing

Author

Bouras, S. ; Suyama, K. ; Tsividis, Y.

Author_Institution

Div. of Comput. Sci., Nat. Tech. Univ. of Athens, Greece

Volume

3

fYear

1996

fDate

8-11 Sep 1996

Firstpage

1951

Abstract

A new fuzzy logic controller, which is suitable for a system with analog input and output, has been implemented in a monolithic form. It employs an architecture where time sweeping of variables allows continuous evaluation of fuzzy inferences and defuzzification without having to discretize input and output variables using A/D and D/A converters. Direct processing of the analog input signal is used to obtain the corresponding crisp value; the digital portion is used only for programmability. The controller can handle 3 inputs, 1 output, and 25 programmable fuzzy rules. The test IC chips were fabricated using 0.7 μm CMOS technology. A control problem of stabilizing a ping-pong ball in a tube with a controllable air flow has been successfully demonstrated

Keywords

CMOS integrated circuits; analogue processing circuits; continuous time systems; controllers; fuzzy control; fuzzy logic; mixed analogue-digital integrated circuits; position control; 0.7 μm CMOS technology; 0.7 mum; analog input signal; continuous processing; controllable air flow; crisp value; defuzzification; fuzzy inferences; integrated fuzzy logic controller; mixed analog-digital VLSI circuit; monolithic implementation; Digital circuits; Fuzzy control; Fuzzy logic; Process control; Random access memory; Signal generators; Signal processing; Switches; Switching circuits; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Fuzzy Systems, 1996., Proceedings of the Fifth IEEE International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-3645-3

Type

conf

DOI

10.1109/FUZZY.1996.552697

Filename

552697