Rockwell Automation RSLogix 5000 Fuzzy Designer - Manual (Page 36)

Publication LOGIX-UM004A-EN-P - March 2007
36 FuzzyDesigner Component Library
Connections
The input link of the input linguistic variable is connectable to any of
these components providing a crisp value:
• input Port component.
• output Linguistic Variable component.
• output Takagi-Sugeno Variable component.
• PID component.
The output logical link of the input linguistic variable is connectable
to components expecting a DOF value (as a result of fuzzification or
defuzzification), such as the Rule Block component.
Parameters
• Name of the component
• Range of the input value of the component [x
min
, x
max
]
• List of terms described by
– Name
– Type of membership function
– Vector of membership function parameters [a, b, c, d]
Output Linguistic Variable The fuzzy system Output Linguistic Variable component stores output
linguistic terms and is used for defuzzification. The component has a
logical input link, degrees of fulfillment of all linguistic terms of the
respective linguistic variable. The link can be multiple, meaning that
the component can be connected to several rule blocks. The
component has two output links – value and logical links. Depending
on the selected inference algorithm and defuzzification method, the
component computes a crisp value y
*
. Such a result provides an
output value link. The output logical link enables the connection of
the component directly to another rule block. If the component input
link is connected to a single rule block, the output degrees of
fulfillment are the same as the input degrees of fulfillment. If the
component is connected to several rule blocks, the output degrees of
fulfillment of linguistic terms are computed as a maximum of the
corresponding input degrees of fulfillment.