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Efficiency of Exponential Deperm Protocol

  • Kim, Yongmin (Department of Information & Communication Engineering, Kyungsung University) ;
  • Kim, Young-Hak (Department of Electrical Engineering, Pukyong National University) ;
  • Shin, Kwang-Ho (Department of Information & Communication Engineering, Kyungsung University)
  • 투고 : 2012.06.04
  • 심사 : 2012.09.19
  • 발행 : 2013.09.30

초록

Magnetic treatment of surface vessels and submarines (Deperm) is required to camouflage them against magnetic detection from enemy marine force. So far, deperm has been accomplished by applying an alternating magnetic field of which amplitude decreases linearly. However, the reduction of the residual flux density in the direction of magnetic field is not linear in the case of the linear protocol, since the ferromagnetic material used to construct a surface vessel, mainly Fe-C, shows a nonlinear behavior in an alternating magnetic field. This is one of main reasons to make an ordinary deperm protocol inefficient. In this paper, we propose the exponential deperming protocol and compare the exponential protocol to conventional linear protocol within the framework of deperm performance. We found out that step number could be reduced in the exponential protocol compare with in the linear protocol, because the larger numbers of deperm steps are dedicated in the irreversible domain process region on the magnetic hysteresis.

키워드

참고문헌

  1. Timothy Malcolm Baynes, "Analysis of the Demagnetisation Process and Possible Alternative Magnetic Treatments for Naval Vessels, Ph. D. thesis, The University of New South Wales (2002).
  2. Holmes, John J. "Reduction of a Ship's Magnetic Field Signatures" Synthesis lectures on computational electromagnetic, 23, (2008).
  3. http://en.wikipedia.org/wiki/Deperming.
  4. T. M. Baynes, G. J. Russell, and A. Bailey, Comparison of Stepwise Demagnetization Techniques, IEEE Trans. Magn. 38, 1753 (2002). https://doi.org/10.1109/TMAG.2002.1017767
  5. http://www.cobham.com/