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김휘석(Hwiseok Kim),임선호(Seonho Lim),도재원(Jaewon Doh) 한국자기학회 2014 韓國磁氣學會誌 Vol.24 No.4
The control and reduction of the magnetization of naval vessel is important technologies for safety against torpedo and sea mine installed magnetic sensors. In general, we used to conduct as a magnetic treatment for permanent magnetization reduction and to compensate induced magnetization using on-board-degaussing system for the naval vessel’s magnetic stealth. Navies have operated magnetic treatment facility in order to protect from sea mines. LIGNex1 Corp. has developed the magnetic treatment facility for the korea navy.
김영학(Young-Hak Kim),김기찬(Ki-Chan Kim),신광호(Kwang-Ho Shin),김휘석(Hwiseok Kim),윤관섭(Kwan-Seob Yoon),양창섭(Chang-Seob Yang) 한국자기학회 2010 韓國磁氣學會誌 Vol.20 No.3
Minor B-H loop measurement for a rectangular high tensile steel was obtained by using Labview. A ferrite cores of high permeance with primary and secondary windings on the steel plate were used to form a closed loop of magnetic flux. To compensate errors due to an extremely small gap between a pair of ferrite core, and between the ferrite core and the rectangular high tensile steel, quadratic function of least square method was used. Also a 3D FEM magnetic analysis tool was used to measure H and B of the steel. B-H loop of the high tensile steel plate can be measured up to 520 A/m of a magnetic field and 0.15 T of a magnetic flux density.
정희준(Hee-Jun Chung),윤진식(Jin-Shik Yoon),김휘석(Hwiseok Kim),윤관섭(Kwan-Seob Yoon),도재원(Jaewon Doh) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Mitigation of magnetic field signatures is an important part of the modern naval vessel. In this paper, the simulation for degaussing coil calibration is presented using OPERA-3d which is kind of FEM software. OPERA-3d supports optimizer tool for multiple objectives and controls to find optimal solution in objective function space. This paper introduces new approach for the optimal calibration of the degaussing coil operation.