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Fuzzy adaptive particle swarm optimization
Fuzzy Adaptive Particle Swarm Optimization
Abstract
Yuhui Shi
EDS Embedded Systems Team
1401 E. Hoffer Street
Kokomo, IN 46902, USA
Y uhui.shi@
and
Russell C. Eberhart
Department of Electrical and Computer Engineering
Purdue School of Engineering and Technology
799 W. Michigan Street
Indianapolis, IN 46202
Eberhart@
particles are manipulated according to the following
equation (Shi and Eberhart I998a, I998b):
I n this paper, a fuzzy system is implemented to
dynamically adapt the inertia weight of the particle
swarm optimization algorithm (PSO). Three
benchmark functions with asymmetric initial range
settings are selected as the test functions. The same
fuzzy system has been applied to all the three test
functions with different dimensions. The
experimental results illustrate that the fuzzy adaptive
PSO i s a promising optimization method, which is
especially useful for optimization problems with a
dynamic environment.
1 Introduction
Particle swam optimization is a population-based
evolutionary algorithm. It is similar to other population-
based evolutionary algorithms in that the algorithm is
initialized with a population of random solutions. It is
unlike most of other population-based evolutionary
algorithms (Goldberg 1989, Fogel 1994, Rechenberg
1994, Koza 1992), however, in that PSO is motivated by
the simulation of social behavior instead of survival of
the fittest, and each candidate solution is associated with
a velocity (Eberhart and Kennedy 1995, Kennedy and
Eberhart 1995, Eberhart, Dobbins and Simpson 1996,
Kennedy 1997). The candidate solutions, called particles,
then “fly” through the search space. The velocity is
constantly adjusted according to the corresponding
particle’s experience and the particle’s companions’
experience. It is expected that the particles will move
towards better solution areas. Mathematically, the
0-7803-6657-3/01/$10.00 2001 IEEE 101
where cI and c2 are positive constants, and rand
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