Patent
1993-02-25
1994-12-06
MacDonald, Allen R.
395 11, G06F 1518
Patent
active
053718321
ABSTRACT:
A fuzzy logic controller is composed of a fuzzification circuit (FUZ), a rule decoder (RDEC), a rule evaluation circuit (RA), an inference circuit (INF), a defuzzification circuit (DFUZ) and a sequencer (CTRL). Numbers (NA) for linguistic values of the output variables together with selection signals (SM) for the definition of the input variables affected by the respective rule formed in the rule decoder and are supplied to the rule evaluation circuit in addition to the values (ME) of the affiliation functions for the linguistic values of the input variables. A weighting signal (G) is generated in the rule evaluation circuit for every linguistic value of the output variables. The advantages obtainable are the high processing speed, the low requirement for chip area, the variable rule format and the selection possibility of different operation modes in the rule evaluation circuit, the inference circuit and the defuzzification circuit.
REFERENCES:
patent: 5165011 (1992-11-01), Hisano
patent: 5184131 (1993-02-01), Ikeda
patent: 5263125 (1993-11-01), Viot et al.
patent: 5280624 (1994-01-01), Iked
"Architecture of a CMOS Fuzzy Logic Controller with Optimized Memory Organisation and Operator Design" by H. Eichfeld, et al, Conference Papers of the First International Conference on Fuzzy Systems FUZZ-IEEE '92, pp. 1317-1323.
Eichfeld Herbert
Kuenemund Thomas
Hafiz Tariq R.
MacDonald Allen R.
Siemens Aktiengesellschaft
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