Optimization of interval type-2 fuzzy logic controllers using evolutionary algorithms

被引：0
|
作者：
O. Castillo
P. Melin
A. Alanis
O. Montiel
R. Sepulveda
机构：
[1] Tijuana,
[2] Institute of Technology,undefined
[3] Center for Research in Digital Systems,undefined
[4] IPN,undefined
来源：
Soft Computing | 2011年 / 15卷
关键词：
Interval type-2 fuzzy logic; Evolutionary algorithms; Fuzzy control;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A method for designing optimal interval type-2 fuzzy logic controllers using evolutionary algorithms is presented in this paper. Interval type-2 fuzzy controllers can outperform conventional type-1 fuzzy controllers when the problem has a high degree of uncertainty. However, designing interval type-2 fuzzy controllers is more difficult because there are more parameters involved. In this paper, interval type-2 fuzzy systems are approximated with the average of two type-1 fuzzy systems, which has been shown to give good results in control if the type-1 fuzzy systems can be obtained appropriately. An evolutionary algorithm is applied to find the optimal interval type-2 fuzzy system as mentioned above. The human evolutionary model is applied for optimizing the interval type-2 fuzzy controller for a particular non-linear plant and results are compared against an optimal type-1 fuzzy controller. A comparative study of simulation results of the type-2 and type-1 fuzzy controllers, under different noise levels, is also presented. Simulation results show that interval type-2 fuzzy controllers obtained with the evolutionary algorithm outperform type-1 fuzzy controllers.
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页码：1145 / 1160
页数：15
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