Rockwell Automation RSLogix 5000 Fuzzy Designer - Manual (Page 150)

Publication LOGIX-UM004A-EN-P - March 2007
150 Glossary
Degree Of Fulfillment (DOF)
A general evaluation of the degree of truth of fuzzy logic expressions.
DOF values range from 0 to 1. For example:
• Term DOF — the DOF for the expression "X is A", is the degree
of membership of x in A.
• Rule DOF — the DOF of the condition part of a rule
extensible markup language (XML)
Class of data objects and definitions that define how programs should
behave. XML documents are made up of parsed data, characters
forming character data or markup. Markup defines the document’s
storage layout and logical structure. FuzzyDesigner uses XML to
define the format in which FuzzyDesigner projects are kept.
fuzzification
Determination of degrees of membership of the crisp input value of
the linguistic terms defined with each input linguistic variable
fuzzy number
A convex fuzzy set with maximum membership degree equaling 1
Hierarchical Fuzzy System (HFS)
A fuzzy system with chained rules and hierarchical structure of the
rule base.
Inference
An application of linguistic rules on input values in order to
generate output values
Input Linguistic Variable (ILV)
Stores linguistic terms and is used for classification of the actual
component input, represented by a crisp value, into the fuzzy sets
defined for the respective linguistic terms.
Input Port (IP)
Preprocesses and stores values of a fuzzy system’s input variables
Intermediate Linguistic Variable (IMLV)
Bridges logical chaining of rule blocks