System for synthesizing new fuzzy rule sets from existing fuzzy

Details System for synthesizing new fuzzy rule sets from existing fuzzy System for synthesizing new fuzzy rule sets from existing fuzzy

1992-05-28

1993-01-12

MacDonald, Allen R.

395 51, 395 61, 395900, G05B 1100

Patent

active

051796341

ABSTRACT:
A fuzzy rule generator for generating fuzzy rules, comprising: a selection unit for selecting two or more sets of rules from a plurality of basic sets of rules which may be stored in memory; and a control unit for generating a new set of rules by carrying out a synthetic arithmetic operation based on a predetermined set of rules for synthesis. This process of synthesis may simply consist of addition or subtraction. Thereby, a new set of rules can be easily generated by carrying out a simple arithmetic operation for each application. Therefore, generation and modification of rules are simplified and speeded up, with additional benefits arising from an efficient utilization of existing sets of rules. Further, by imposing a constraint on the newly synthesized set of rules manually, automatically or by a combination of both according to a predefined algorithm, it is possible not only to ensure the stability of the system but also to obtain desired control characteristics. If desired, the newly created sets of rules may be added to the library of the basic sets of fuzzy rules.

REFERENCES:
Procyk et al., "A Linguistic Self-Organizing Process Controller", Automatica vol. 5 pp. 15-30 Jan. 1979.
Gupta et al., "Controllability of Fuzzy Control Systems", IEEE Trans, on Systems, Man and Cybernetics, V. SMC-16 N. 4, Jul./Aug. 1986 pp. 576-582.
Nonlinear Automatic Control, Gibson, John E., Ph.D., McGraw-Hill Book Company; pp. 291-339.

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