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Using genetic algorithms for compensating the local magnetic perturbation of a ship in the earth's magnetic field
Author(s) -
Madrid Antonio Villalba,
Melcón Alejandro Alvarez
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21147
Subject(s) - perturbation (astronomy) , magnetic field , microwave , algorithm , genetic algorithm , convergence (economics) , function (biology) , computer science , engineering , physics , mathematical optimization , mathematics , telecommunications , quantum mechanics , economics , economic growth , evolutionary biology , biology
This paper shows a practical application of genetic algorithms (GAs) for compensating the local magnetic perturbation produced by a ship, while moving in the earth's magnetic field. The compensation is achieved by modifying the number of turns and the current magnitude across the so‐called degaussing coils distributed along the ship. A GA scheme for automatic optimisation of these parameters is used. A new objective‐function strategy, called a boundary method, is proposed. It is shown that the convergence of the GA is greatly improved when the new objective function is used. Different selection mechanisms, objective function strategies, and scaled methods are revised in this paper. The results show that GAs can be efficiently used to reduce drastically the magnetic field levels of real practical ships. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 281–287, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21147