Digital fuzzy apparatus having simplified barycentral operation

Details Digital fuzzy apparatus having simplified barycentral operation Digital fuzzy apparatus having simplified barycentral operation

1991-11-04

1993-04-13

Fleming, Michael R.

395 51, 395900, G05B 1100

Patent

active

052029549

ABSTRACT:
A digital fuzzy apparatus includes a fuzzy rule operation circuit for performing an operation on an input value in accordance with fuzzy rules constituted by membership functions and outputting address position data and fitness degree data in units of fuzzy rules. A maximum value operation circuit calculates a maximum value of fitness degree data output from the fuzzy rule operation circuit at each corresponding address position. An address selector selects an effective range on the basis of an address position at which the maximum value of the fitness degree data which are output at each corresponding address position exceeds a predetermined value. A barycentral position operation circuit calculates a barycentral position on the basis of the address positions within the effective range and the fitness degree data output from the maximum value operation circuit in correspondence with the address positions. An output circuit calculates a final barycentral position in accordance with the barycentral position output from the barycentral position operation circuit and the address positions selected by the address selector and outputs the final barycentral position as an inferential result.

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Watanabe et al., "A VLSI Fuzzy Logic Controller with Reconfigurable, Cascadable Architecture", IEEE Jour. Solid-State Circuits, vol. 25 (2), Apr. 1990, pp. 376-382.

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