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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