External magnetic characterization of marine vehicles

Kildishev, Alexander V.; Nyenhuis, J.A.

doi:10.1109/oceans.2000.881756

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Since the survey ship has been artificially demagnetized many times before being put into use, the permanent magnetism of the survey ship can be negligible, and the induced magnetism has a major impact on magnetometers [30]. In this simulation, we considered the main hull of the survey ship which only has induced magnetism with the length of 20 m, the width of 7 m and the height of 4 m (the 3D printed ship was modeled with the scale ratio of 100 smaller than the actual survey ship), and the magnetometers towed 50 m astern of the ship.…”

Section: Application In Marine Magnetic Surveymentioning

confidence: 99%

Simulation of the Magnetic Signature for Ferromagnetic Objects in Motion Using 3D-Printing Data

Sui

Liu

et al. 2019

IEEE Access

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Investigations of the magnetic signature for ferromagnetic objects are extremely important in many areas. Some famous software can calculate the magnetic signature generated by the 3D ferromagnetic objects in motion, but they require tremendous computational time and large numerical resources. Therefore, we propose a simulation method whose core idea is to approximate the ferromagnetic object by a collection of magnetic dipoles whose placement is identified with the tool path information generated by 3D printing software and calculate the magnetic signature of the ferromagnetic object using the superposition principle. In view of the fact that each particle of a rigid body has the same laws of motion while the body moving and rotating in 3D space, coordinate translations, and rotations are used to implement the six-degrees-offreedom movement of ferromagnetic objects. The simulations with a static object and objects in motion in the application of the magnetic test for a satellite validate the correctness of the proposed method. The evaluation of magnetic interference of a survey ship demonstrates the effectiveness. The method is easy to implement and has strong practicability and powerful expansibility.

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Section: Application In Marine Magnetic Surveymentioning

confidence: 99%

Simulation of the Magnetic Signature for Ferromagnetic Objects in Motion Using 3D-Printing Data

Sui

Liu

et al. 2019

IEEE Access

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“…It is also a primary factor hindering the development of highprecision magnetic measurement technologies using sensors aboard these vehicles [3]. With regard to ship degaussing [4,5], mastering the characteristics of a vessel's induced magnetic field is vital to realizing effective compensation methods. Marine and aerial magnetic surveys also suffer from induced magnetic fields as one of the main sources of interference [6,7].…”

Section: Introductionmentioning

confidence: 99%

An Accelerated 3D-Magnetostatic Field Computation Method With Tetrahedral Surface Integrals

Zhao¹,

Wubing²,

Zhuang³

2017

Proceedings of the 2017 2nd Joint International Information Technology, Mechanical and Electronic Engineering Conference (JIMEC

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An innovative accelerated integral equation method is proposed based on a fast search algorithm for both shared and non-shared faces among mesh elements. This method successfully accelerates the computational process of solving for the tetrahedral coupling coefficients. By using the proposed accelerated integral equation method, the efficiency of constructing the coupling matrix can be improved by more than 40% without decreasing computational accuracy, as demonstrated by analytical solutions, simulations and experimental examples.

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“…Induced magnetism which caused by external environmental magnetic field of carriers (such as ships, planes, etc) composed of ferromagnetic materials is one of main threats to the navigation security of naval vessels [1,2] and a key factor to restrict the development of high-precision magnetism measurement technology executed by magnetic sensor carriers [3]. In the field of ship degaussing [4,5], mastering the characteristics of vessels' induced magnetic field is an extremely important factor to realize the high-precision compensation of induced magnetic field. In terms of marine magnetic survey and aeromagnetic survey, induced magnetic field is one of the main interference sources [6,7].…”

Section: Introductionmentioning

confidence: 99%

3D Magnetostatic Field Computation Based on Hybrid Mesh Integral Equation Method

Wubing¹,

Zhao²,

Zhuang³

et al. 2016

Proceedings of the 2016 5th International Conference on Measurement, Instrumentation and Automation (ICMIA 2016)

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Accurate magnetostatic field computation for complex 3D ferromagnetic objects can be widely used to solve various engineering problems, while mesh quality is a key factor that can greatly affect the calculation precision. For complex shaped 3D objects, their mesh quality can be improved greatly by using hybrid mesh strategy with the advantages of hexahedral elements and tetrahedral elements. In this paper, a hybrid mesh integral equation method (IEM) for 3D magnetostatic field computation is realized based on mixed mesh with hexahedrons and tetrahedrons. Furthermore, computational accuracy of the proposed method is demonstrated by simulation and experimental examples with 2.10% and 3.20%, respectively. Thus, foundations for the mixed mesh strategy for the complex shaped 3D objects and fast computational methods with hybrid mesh IEM are established.

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External magnetic characterization of marine vehicles

Cited by 6 publications

References 6 publications

Simulation of the Magnetic Signature for Ferromagnetic Objects in Motion Using 3D-Printing Data

Simulation of the Magnetic Signature for Ferromagnetic Objects in Motion Using 3D-Printing Data

An Accelerated 3D-Magnetostatic Field Computation Method With Tetrahedral Surface Integrals

3D Magnetostatic Field Computation Based on Hybrid Mesh Integral Equation Method

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