Device and corresponding method for determining a fuzzy logic conclusion based on a plurality of machining rules

A fuzzy inference method for controlling a machine comprising the steps of:

• storing a first plurality of production rules, each comprising a condition part and a conclusion part, and corresponding membership functions;
• representing at least a number (n) of said rules each as a geometric shape;
• calculating an area (Si) and center of gravity position (Li) of each of said number of geometric shapes;
• calculating an inference result, using said membership functions, in accordance with the following:
• ##EQU20## and controlling said machine using said inference result.

A fuzzy inference method which uses a plurality of rules and the significance .beta.i of each of said rules to realize a fuzzy inference conclusion to control a machine, comprising the steps of:

• predetermining the significance .beta.i of each of said rules;
• representing at least a number (n) of said rules each as a geometric shape;
• determining an area Si and center of gravity position Li of each of said number of geometric shapes;
• determining said fuzzy inference conclusion in accordance with the following:
• ##EQU21## and controlling said machine using said fuzzy inference conclusion.

A fuzzy inference device which uses a plurality of rules and the significance .beta.i of each of said rules to realize a fuzzy inference conclusion to control a machine, comprising:

• a first component which predetermines the significance .beta.i of each rule;
• a second component which represents at least a number (n) of said rules each as a geometric shape and determines an area Si and center of gravity position Li of each of said number of geometric shapes;
• a third component which determines said fuzzy inference conclusion in accordance with the following:
• ##EQU22## and a fourth component which uses said fuzzy inference conclusion to control said machine.