Majalah Ilmiah UNIKOM
Vol.9, No. 1
46
H a l a m a n
of the fuzzy inference system are the pop-
up menus that allow user to modify the
various pieces of the inference process.
The user can choose In these toolbox, two
build-in AND methods are supported : min
(minimum) and prod (product). Two build-
in OR methods are also supported : max
(maximum) and probor (the probabilistic
OR method). Three build-in aggregation
methods are supported : max (maximum),
probor (probabilistic OR) and sum (simply
the sum of each rule’s output set). And
there are five built-in defuzzification meth-
ods supported: centroid, bisector, middle
of maximum (the average of the maximum
value of the output set), largest of maxi-
mum and smallest of maximum.
Fig. 3. FIS Editor of IT2 FLS Toolbox
The Membership function Editor is
used to define, display and edit all of the
membership functions associated with all
of the input and output variables for the
entire fuzzy inference system.. Figure 4
show the Membership Function Editor of
the Interval Type-2 Fuzzy Inference Sys-
tems. The types of membership functions
are triangular mf, trapezoidal mf, gaussian
mf, two-gaussian mf, sigmoid, mf, D-
sigmoid mf, P-sigmoid mf and generalized
bell membership function.
Fig .4. MF Editor of IT2 FLS Toolbox
The Rule Editor is for editing the list of
rules that defines the behavior of the sys-
tem. Figure 5 show the Rule Editor of the
Interval Type-2 Fuzzy Inference Systems.
Fig. 5. Rule Base of IT2 FLS Toolbox
The Surface Viewer is used to display
the dependency of one the outputs on any
one or two of the inputs. It generates and
plots an output surface map for the sys-
tem. Figure 6 show the Surface Viewer of
the Interval Type-2 Fuzzy Inference Sys-
tems. The Surface Viewer has a special
Muhammad Aria