Sgs-thomson Microelectronics S.r.l.

Consorzio Per La Ricerca Sulla Microelettronica Nel Mezzogiorno

Stmicroelectronics S.r.l.

Claudio Luzzi

Rinaldo Poluzzi

Biagio Giacalone

Biagio Russo

Francesco Pappalardo

Vincenzo Matranga

Francesca Grande

Carmelo Marcello Palano

Vincenzo Catania

A codifying and storing method for membership functions representing a membership degree of fuzzy variables defined within a universe of discourse which is discretized into a finite number of points is provided. The membership functions are quantized into a finite number of levels corresponding to a finite number of membership degrees and are stored by means of a characteristic value of each sub-set of values of fuzzy variables having for their image the same value of the membership degree corresponding to one of said levels. Also provided is a method for calculating the value of the membership degree of a fuzzy variable defined within a universe of discourse discretized into a finite number of points with reference to a membership function thereof, as well as to a circuit for calculating the membership degree of a fuzzy variable with reference to a membership function thereof.

Coding and memorizing method for fuzzy logic membership functions and corresponding method and circuit architecture for calculating the membership degree

A method and system for processing a plurality of fuzzy logic rules. The system includes a plurality of fuzzy logic lines, each fuzzy logic line corresponding to one of the fuzzy logic rules and including a calculating device. Each calculating device has an input terminal for receiving a series of weights and an output terminal for outputting an overall truth value according to the received series of weights and at least one logical operator of the fuzzy logic rule corresponding to the fuzzy logic line. The system further includes processing circuitry coupled to each fuzzy logic line, for receiving the overall truth value from each line, and outputting a fuzzy logic value according to the received overall truth values.

Method for parallel processing of fuzzy logic inference rules and

A method for loading the memory of an electronic controller operating using fuzzy logic, whereby predetermined membership functions of logic variables, defined within a universe of discourse sampled in a finite number of points, are subjected to inference operations basically configured as IF/THEN rules with at least one front preposition and at least one rear implication. The controller includes a central control unit provided with a memory section for storing predetermined values of the membership functions which appear in the front or IF part of the fuzzy rules and have a predetermined degree of truth or membership. This method provides for storing the memory section the only values of those membership functions that have a value of the degree of membership other than zero at the points of the universe of discourse.

Memory organization method for a fuzzy logic controller and

A method for setting up the memory of an electronic controller operates using fuzzy logic, whereby predetermined membership functions f(m) of logic variables M, defined within a universe of discourse sampled in a finite number of points m, are subjected to inference operations basically configured by IF/THEN rules with at least one front preposition and at least one rear implication. The controller includes a central control unit provided with a memory section for storing predetermined values of the membership functions f(m) which appear in the front or IF part of the fuzzy rules and have a predetermined degree of truth or membership. This method provides for storing into the memory section only the values of those membership functions f(m) which have a value of the degree of membership other than zero at the points m of the universe of discourse.

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Acri, Italy

Claudio Luzzi