Title :
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
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;
Conference_Titel :
Fuzzy Systems, 1996., Proceedings of the Fifth IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3645-3
DOI :
10.1109/FUZZY.1996.552697
