DocumentCode :
1427549
Title :
Efficient Methodology for Optimizing Degaussing Coil Currents in Ships Utilizing Magnetomotive Force Sensitivity Information
Author :
Choi, Nak-Sun ; Jeung, Giwoo ; Jung, Sang Sik ; Yang, Chang-Seob ; Chung, Hyun-Ju ; Kim, Dong-Hun
Author_Institution :
Dept. of Electr. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Volume :
48
Issue :
2
fYear :
2012
Firstpage :
419
Lastpage :
422
Abstract :
This paper presents an efficient methodology for optimizing degaussing coil currents in ships to minimize the anomaly of underwater magnetic fields due to the hull magnetization induced under the Earth´s magnetic field. To achieve this, first, the shielding effect of the hull on the underwater fields is thoroughly examined. Then, for a fast search of optimum degaussing currents, a sensitivity formula of an objective function with respect to the magnetomotive force is adopted. The feature of the proposed method is that it does not require any numerical field analyses to assess an objective function during optimization process providing experimental field data for each coil are given. The validity and effectiveness of the method has been tested with a model ship.
Keywords :
geomagnetism; magnetic fields; magnetisation; numerical analysis; optimisation; shielding; ships; Earth magnetic field; degaussing coil currents; hull magnetization; magnetomotive force sensitivity information; numerical field analysis; objective function; optimization; shielding effect; ships; underwater magnetic fields; Coils; Magnetic noise; Magnetic shielding; Magnetostatics; Marine vehicles; Optimization; Sensitivity; Electromagnetic fields; inverse problems; optimization; sensitivity analysis;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2011.2177515
Filename :
6136492
Link To Document :
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