1996-04-10
1998-02-17
Davis, George B.
395900, G06F 944
Patent
active
057200009
ABSTRACT:
A fuzzy logic apparatus includes: an adder, having two input ports, for receiving through one input port a difference value of a difference between a predetermined crisp input data and center data and receiving through the other input port a predetermined first selection signal for determining a corresponding membership function, and adding the data input thereto; a memory having pre-stored attachment degree data for receiving the data output from the adder as address data and outputting attachment degree data bits corresponding to the input address; a selector for receiving the attachment degree data divided into groups and outputting one of the groups of attachment degree data based on predetermined second and third selection signals for selecting the membership function; and an AND logic unit for receiving through one input port a logic value corresponding to comparison between a predetermined value and difference data corresponding to a difference between the predetermined crisp input data and the center data and receiving through the other input port the group of attachment data output from the selector and outputting final attachment degree data by logically ANDing the data input to the two input ports. Accordingly, the memory capacity of the fuzzy logic apparatus is reduced by setting an arbitrary membership function at an arbitrary position, according the height of an equilateral triangle of the membership function.
REFERENCES:
patent: 5179629 (1993-01-01), Nakamura
patent: 5280624 (1994-01-01), Ikeda
patent: 5371832 (1994-12-01), Eichfeld et al.
patent: 5412752 (1995-05-01), Basehore et al.
Davis George B.
Samsung Electronics Co,. Ltd.
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