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Publication Date
Mon May 08 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Volume
25
Issue Number
2
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jih-641
On Fuzzy Groups and Group Homomorphism
Fuzzy Groups
Group Homomorphism
L. N. M. Tawfiq
M. M. Qa'aed
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In this paper, we study the effect of group homomorphism on the chain of level subgroups of fuzzy groups. We prove a necessary and sufficient conditions under which the chains of level subgroups of homomorphic images of an a arbitrary fuzzy group can be obtained from that of the fuzzy groups . Also, we find the chains of level subgroups of homomorphic images and pre-images of arbitrary fuzzy groups

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Tue Mar 31 2015
Journal Name
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Intelligent H2/H∞ Robust Control of an Active Magnetic Bearings System
Keywords: Active Magnetic Bearings (AMB)
Adaptive Neuro Fuzzy Inference System (ANFIS)
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modelling errors
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Abstract

Robust controller design requires a proper definition of uncertainty bounds. These uncertainty bounds are commonly selected randomly and conservatively for certain stability, without regard for controller performance.  This issue becomes critically important for multivariable systems with high nonlinearities, as in Active Magnetic Bearings (AMB) System. Flexibility and advanced learning abilities of intelligent techniques make them appealing for uncertainty estimation. The aim of this paper is to describe the development of robust H2/H∞ controller for AMB based on intelligent estimation of uncertainty bounds using Adaptive Neuro Fuzzy Inference System (ANFIS).  Simulatio

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