US 2002/0059149 A1 · Method for processing fuzzy inferences and corresponding processing structure

Abstract

For encoded membership functions used to identify the atomic conditions defining the antecedents of fuzzy inferences, and also for the determination of the operands of the antecedents, corresponding stores are configured for the storage of the already available values of these encoded membership functions and of the operands. At the time of identification of a new value for the quantities, a check is made to see whether this value is already present in the corresponding store. If the outcome of this check is positive, in the case of encoded membership functions, the mechanism by which the encoded fuzzy inferences point to these functions is changed, so that the pointers of the encoded fuzzy inferences are redirected towards the membership functions which are already stored. In the case of the operands of the antecedents, the check of the corresponding back-up store is carried out preferably on the basis of the corresponding calculation values, the calculation of a new operand being disabled when it is found that the corresponding calculation parameters are already present in the corresponding back-up store. The aforesaid store is preferably configured as a stack to which new calculated operand values are written at the uppermost position, with the possibility of making values identified as already present shift back to this uppermost position.

Claims31

Dependent claims

A method for controlling the operation of a structure for processing fuzzy inferences comprising corresponding antecedents defined by atomic conditions identified from membership functions, the atomic conditions also identifying corresponding operands of the antecedents, the method comprising the operations of:

organizing in the structure, for a quantity included among the membership functions and the operands, a corresponding store for storing the values of the quantity which are already available;
and
checking, at a time of identification of a new value of the quantity, whether the new value is already present in the corresponding store.

A processing structure for processing an input fuzzy inference that includes plural corresponding input membership functions, the processing structure comprising:

a membership function storage device for storing encoded membership functions;
and
fuzzy inference encoding means, coupled to the membership function storage device, for encoding the input fuzzy inference into an encoded fuzzy inference, including for each of the input membership functions:
encoding the input membership function into an encoded input membership function;
comparing the encoded input membership function to the stored encoded membership function;
if a stored encoded membership function is found to match the encoded input membership function, then storing with the encoded fuzzy inference a pointer to the matching stored encoded membership function;
and
if none of the stored encoded membership functions is found to match the encoded input membership function, then storing the encoded input membership function in the membership function storage device and storing with the encoded fuzzy inference a pointer to the stored encoded input membership function.

5 more elements

Dependencies are inferred from the claim text.

Method for processing fuzzy inferences and corresponding processing structure

Life of this patent

Method for processing fuzzy inferences and corresponding processing structure

Life of this patent

Abstract

Claims31