Rockwell Automation RSLogix 5000 Fuzzy Designer - Manual (Page 35)

Publication LOGIX-UM004A-EN-P - March 2007
FuzzyDesigner Component Library 35
This value is simply membership degree of value x
*
to fuzzy set A and
can be interpreted as a degree to which the proposition (x
*
IS A) is
true. An example of fuzzification of the crisp input value x
*
is shown
in the figure Process of Crisp Input Fuzzification. The component
input value is -0.3191.
The component consists of three linguistic terms – negative, zero, and
positive. The output of the component is the vector [0.6383, 0.3617, 0]
– where 0.6383 is a degree of fulfillment of the term negative, 0.3617
is a degree of fulfillment of the term zero, and 0 is a degree of
fulfillment of the term positive.
This value is simply membership degree of value x
*
to fuzzy set A and
can be interpreted as a degree to which the proposition (x
*
IS A) is
true.
Process of Crisp Input Fuzzification
DOFs of all terms are provided to connect rule blocks to complete the
fuzzy logic inference.
Current input value
Term DOF =
membership degree