Efficient Methodology for Optimizing Degaussing Coil Currents in Ships Utilizing Magnetomotive Force Sensitivity Information

Choi, Nak-Sun; Jeung, Gi-Woo; Jung, Sang Sik; Yang, Chang-Seob; Chung, Hyun-Ju; Kim, Dong-Hun

doi:10.1109/tmag.2011.2177515

Cited by 14 publications

(9 citation statements)

References 5 publications

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“…The coils are classified into three types with a reference direction heading from the stern to the bow: longitudinal coil (L coil), athwartship coil (A coil) and vertical coil (V coil) [7,8]. As an example, Fig.…”

Section: Basic Principle Of the Degaussing Techniquementioning

confidence: 99%

“…Consequently, the hull generates an underwater magnetic field around the ship even though the magnitude is much smaller than that of the earth's magnetic field. However, the magnetic field anomaly may expose a ship to serious hazards, such as mines or torpedoes equipped with highly sensitive magnetic sensors [1][2][3][4][5][6][7][8]. To ensure the security of modern naval vessels, magnetic treatment consisting of deperming and degaussing techniques have been highlighted in defense-related industries.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the degaussing technique includes a treatment to achieve magnetic silencing of a ship. To date, a number of related studies have been reported and their main focus has been to highly tune individual current values flowing through onboard degaussing coils [7,8]. Several optimization methods such as evolution strategy, particle swarm and design sensitivity have been successfully applied to degaussing coil systems in order to optimize individual coil currents [2,3,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, research on this topic is rare within the electromagnetics community. The authors recently proposed a fault detection method for a degaussing coil system in [7] and [8]. On the assumption that all the information for individual degaussing coils, such as dimension, location and number of turns, were given, underwater field data and a sensitivity formula with respect to the magneticmotive force can be exploited.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Indirect Fault Detection Method for an Onboard Degaussing Coil System Exploiting Underwater Magnetic Signals

Jeung¹,

Choi²,

Yang³

et al. 2014

Journal of Magnetics

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This paper proposes an indirect fault detection method for an onboard degaussing coil system, installed to reduce the underwater magnetic field from the ferromagnetic hull. The method utilizes underwater field signals measured at specific magnetic treatment facilities instead of using time-consuming numerical field solutions in a three-dimensional space. An equivalent magnetic charge model combined with a material sensitivity formula is adopted to predict fault coil locations. The purpose of the proposed method is to yield reliable data on the location and type of a coil breakdown even without information on individual degaussing coils, such as dimension, location and number of turns. Under several fault conditions, the method is tested with a model ship equipped with 20 degaussing coils.

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Section: Basic Principle Of the Degaussing Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indirect Fault Detection Method for an Onboard Degaussing Coil System Exploiting Underwater Magnetic Signals

Jeung¹,

Choi²,

Yang³

et al. 2014

Journal of Magnetics

Self Cite

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“…Even though its magnitude is much smaller than that of the Earth's magnetic field, it can activate underwater weapon systems equipped with high-sensitivity magnetic sensors, such as influence mines, or underwater detecting equipment. To protect the ship from these threats, it is necessary to establish proper countermeasures against the detection sensors of an influence mine or an underwater detection system [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Field Separation Technique for a Scaled Model Ship through an Earth's Magnetic Field Simulator

Chung¹,

Yang²,

Jung³

2015

Journal of Magnetics

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This paper presents an experimental technique to accurately separate a permanent magnetic field and an induced one from the total magnetic fields generated by a steel ship, through compensating for the Earth's magnetic field. To achieve this, an Earth's magnetic field simulator was constructed at a non-magnetic laboratory, and the field separation technique was developed, which consisted of five stages. The proposed method was tested with a scaled model ship, and its permanent and induced magnetic fields were successfully extracted from the magnetic field created by the ship. Finally, based on the separated permanent magnetic field data, the permanent magnetization distribution on the hull was predicted by solving an inverse problem. Accordingly, the permanent magnetic fields generated by the ship can easily be calculated at any depth of water.

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Coastal Border Control Using Magnetic Field Signatures

Vermeulen

2018

Nl Arms

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Efficient Methodology for Optimizing Degaussing Coil Currents in Ships Utilizing Magnetomotive Force Sensitivity Information

Cited by 14 publications

References 5 publications

Indirect Fault Detection Method for an Onboard Degaussing Coil System Exploiting Underwater Magnetic Signals

Indirect Fault Detection Method for an Onboard Degaussing Coil System Exploiting Underwater Magnetic Signals

A Magnetic Field Separation Technique for a Scaled Model Ship through an Earth's Magnetic Field Simulator

Coastal Border Control Using Magnetic Field Signatures

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