Page 311 - Electrical Engineering Dictionary

range. A typical example is a fuzzy model of
Takagi–Sugeno–Kang type.

fuzzylocalsystem fuzzysysteminasense
of local region of plant operation range. A
Pure fuzzy inference system.
typical example is a fuzzy system of Takagi–
Sugeno–Kang type.

fuzzy logic introduced by Zadeh (1973),
gives us a system of logic that deals with
fuzzy quantities, the kind of information hu-
mans manipulate that is generally impre-
Mamdani fuzzy system. cise and uncertain. Fuzzy logic’s main
characteristics is the robustness of its in-
fuzzy input–output model input–output terpolative reasoning mechanism. See also
models involving fuzzy logic concepts. A approximate reasoning, linguistic variable,
typical example is a fuzzy dynamic model modifier, generalized modus ponens.
consisting of a number of local linear trans-
fer functions connected by a set of nonlinear fuzzy logic controller controller based on
membership functions. a fuzzy logic system. See also fuzzy logic
system.
fuzzy integral an aggregation operator
used to integrate multiattribute fuzzy infor- fuzzy logic system a system of logic that
mation. It is a functional defined by using deals with fuzzy quantities, that are unprecise
fuzzy measures, which corresponds to prob- and uncertain.
ability expectations. Two commonly used
fuzzy integrals are Sugeno integral and Cho- fuzzy measure a subjective scale used to
quet integral. express the grade of fuzziness similar to the
way probability measure is used to express
fuzzy intensification an operator that in- the degree of randomness. An example of
creases the membership function of a fuzzy fuzzy measure is g λ -fuzzy measure proposed
set above the crossover point and decreases by Sugeno.
that of a fuzzy set below the crossover point.
fuzzy membership function function
fuzzy intersection the fuzzy intersection of characterizing fuzzy sets in a universe
is interpreted as “A AND B,” which takes of discourse which takes values in the in-
the minimum value of the two membership terval [0, 1]. Typical membership func-
functions. tions include triangular, trapezoid, pseudo-
trapezoid, and Gaussian functions.
fuzzy ISODATA See fuzzy c-means.
fuzzy minus the minus operation applied
fuzzy local control fuzzy control in a to a fuzzy set to give an intermediate effect
sense of local region of plant operation range, of dilation. See also fuzzy plus.
which is a key feature of fuzzy control. A
typical example is a local control based on a fuzzy model See also fuzzy inference
local fuzzy dynamic model. system.

fuzzy local model a fuzzy model in fuzzy model-based control fuzzy control
a sense of local region of plant operation based on various kinds of mathematical or

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2000 by CRC Press LLC