Hydrophysics

Hydrophysics

Design and Release of Reparative Characteristic Online Simulator of Ferromagnetic Ships Using Electrical Current Loops

Document Type : Original Article

Authors
Davood Rahi 1
MIr Mohammad reza Seyyad Habashi 2
Mohsen Hesami 2
Mohsen Safi Khani 3
1 Faculty of Advanced Sciences and Technologies, University of Isfahan, Iran
2 Faculty of Advanced Sciences and Technologies, University of Isfahan, 81746-73441 Isfahan, Islamic Republic of Iran
3 null
Abstract
One way of detecting ships or submarines is the observation of magnetic field signature around the object. Ships or submarines can be assumed as a collection of closed circuit of electrical currents. The electrical current of each close circuit must be properly regulated. The main purpose is production of a magnetic field equal to the magnetic field around the ship but with the opposite direction. By using this method, the magnetic field can be effectively reduced. This simulator is designed in C# language and it was named General Magnetic Compensation. The inputs of this software are geometry, location and magnetic field and the output is electrical currents of each closed loop, thus making the magnetic field reduced around the submarine. Accuracy and validity of the new software was investigated by analytical relation of magnetic field for proper geometry. Then a submarine was simulated in COMSOL and data of this simulation were used in General Magnetic Compensation software. The results were in great agreement with the results of the COMSOL software and could predict the magnetic field well.
Keywords
Magnetic Field
Submarine
De-magnetization
Electrical Current
C#

Subjects

[1]  Holtham PM, Lucas CE. New Approaches to Magnetic Modelling, I: Prolate Spheroids, II: One-spike-at-a-time Fitting. Department of National Defence, Research & Development Branch, Defence Research Establishment Pacific; 1993.p.66.
[2]  Holmes JJ. Reduction of a ship's magnetic field signatures. Synthesis Lectures on Computational Electromagnetics. 2008 Jan 1;3(1):1-68.
[3]    Holmes JJ, Steffey S. Advanced Degaussing Coil System. Washington DC: Department of the NAVY; 1996. US PATENT No. PAT-APPL-217 908.
[4]    Wingo RA, Holmes JJ, Lackey MH. Test of Closed‐Loop Degaussing Algorithm on a Minesweeper Engine. Naval Engineers Journal. 1992 May;104(3):219-27.
[5]    Jackson JD. Classical electrodynamics. New York: John Wiley & Sons, Inc; 1999.
[6]  Reitz JR, Milford FJ. Foundations of Electro Magnetic Theory. Addison; 1960.p. 276
[7]  Hager WW. Iterative methods for nearly singular linear systems. SIAM Journal on Scientific Computing. 2000; 22(2):747-66.
[8]  Barrett R, Berry MW, Chan TF, Demmel J, Donato J, Dongarra J et al. Templates for the solution of linear systems: building blocks for iterative methods. Siam; 1994.
[9]  Maziar Salahi. On regularization of ill-conditioned linear systems. Journal of Applied Mathematics. 2008;5(17):43-49.
[10]  Calvetti D, Morigi S, Reichel L, Sgallari F. Tikhonov regularization and the L-curve for large discrete ill-posed problems. Journal of computational and applied mathematics. 2000 Nov 1;123(1-2):423-46.

  • Receive Date 18 September 2018
  • Revise Date 17 January 2019
  • Accept Date 12 February 2019