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Reduction Of A Ships Magnetic Field Signatures
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Book Synopsis Reduction of a Ship's Magnetic Field Signatures by : John J. Holmes
Download or read book Reduction of a Ship's Magnetic Field Signatures written by John J. Holmes and published by Morgan & Claypool Publishers. This book was released on 2008 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreasing the magnetic field signature of a naval vessel will reduce its susceptibility to detonating naval influence mines and the probability of a submarine being detected by underwater barriers and maritime patrol aircraft. Both passive and active techniques for reducing the magnetic signatures produced by a vessel's ferromagnetism, roll-induced eddy currents, corrosion-related sources, and stray fields are presented. Mathematical models of simple hull shapes are used to predict the levels of signature reduction that might be achieved through the use of alternate construction materials. Also, the process of demagnetizing a steel-hulled ship is presented, along with the operation of shaft-grounding systems, paints, and alternate configurations for power distribution cables. In addition, active signature reduction technologies are described, such as degaussing and deamping, which attempt to cancel the fields surrounding a surface ship or submarine rather than eliminate its source. Table of Contents: Introduction / Passive Magnetic Silencing Techniques / Active Signature Compensation / Summary
Book Synopsis Reduction of a Ship's Magnetic Field Signatures by : John Holmes
Download or read book Reduction of a Ship's Magnetic Field Signatures written by John Holmes and published by Springer Nature. This book was released on 2022-06-01 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreasing the magnetic field signature of a naval vessel will reduce its susceptibility to detonating naval influence mines and the probability of a submarine being detected by underwater barriers and maritime patrol aircraft. Both passive and active techniques for reducing the magnetic signatures produced by a vessel's ferromagnetism, roll-induced eddy currents, corrosion-related sources, and stray fields are presented. Mathematical models of simple hull shapes are used to predict the levels of signature reduction that might be achieved through the use of alternate construction materials. Also, the process of demagnetizing a steel-hulled ship is presented, along with the operation of shaft-grounding systems, paints, and alternate configurations for power distribution cables. In addition, active signature reduction technologies are described, such as degaussing and deamping, which attempt to cancel the fields surrounding a surface ship or submarine rather than eliminate its source. Table of Contents: Introduction / Passive Magnetic Silencing Techniques / Active Signature Compensation / Summary
Book Synopsis Exploitation of a Ship's Magnetic Field Signatures by : John J. Holmes
Download or read book Exploitation of a Ship's Magnetic Field Signatures written by John J. Holmes and published by Morgan & Claypool Publishers. This book was released on 2006 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface ship and submarine magnetic field signatures have been exploited for over 80 years by naval influence mines, and both underwater and airborne surveillance systems. In this book, author John Holmes presents the generating mechanism of the four major shipboard sources of magnetic fields, along with a detailed description of the induced and permanent ferromagnetic signature characteristics.Holmes presents a brief historical summary of magnetic naval mine development during World War II followed by a discussion of important improvements found in modern weapons, including an explanation of the damage mechanism for non-contact explosions. This is followed by a brief historical discussion of underwater and airborne submarine surveillance systems and magnetic field sensing principles, in which mathematical formulations are presented for computing expected target signal strengths and noise levels for several barrier types.Also outlined is a multi-layered defensive strategy against naval mines, with graphical explanations of the relationships between ship signature reduction and minefield clearing effectiveness. Equations for estimating geomagnetic, ocean surface wave, platform, and vector sensor motion noises are presented along with simple algorithms for their reduction.
Book Synopsis Exploitation of a Ship’s Magnetic Field Signatures by : John Holmes
Download or read book Exploitation of a Ship’s Magnetic Field Signatures written by John Holmes and published by BoD - Books on Demand. This book was released on 2024-02-15 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Exploitation of a Ship’s Magnetic Field Signatures" by John Holmes is a groundbreaking exploration of naval technology and strategic warfare. Holmes delves into the intricate realm of magnetic field signatures emanating from ships, unraveling their implications for military operations and defense systems. The book meticulously examines how adversaries can exploit these magnetic signatures for tactical advantage or to devise countermeasures. Holmes, with authoritative expertise, offers insights into the implications for naval tactics, submarine warfare, and the development of magnetic signature mitigation technologies. This work stands as an indispensable guide for naval professionals, defense analysts, and technology enthusiasts, providing a thorough understanding of the nuanced interplay between magnetic fields and maritime security. As a seminal contribution to the field, Holmes' work navigates the complex waters of magnetic signature exploitation, making it a must-read for anyone seeking a deeper comprehension of naval strategy and modern defense mechanisms.
Book Synopsis Modeling a Ship's Ferromagnetic Signatures by : John J. Holmes
Download or read book Modeling a Ship's Ferromagnetic Signatures written by John J. Holmes and published by Morgan & Claypool Publishers. This book was released on 2007 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferromagnetic models of ships and submarines that predict or reproduce their magnetic signatures have found applications in the development of both offensive and defensive military systems from World War II to the present. The mathematical basis of generalized coordinate systems will be presented and demonstrated with example applications to analytic spherical and prolate spheroidal magnetic ship models. In addition, the advantages and pitfalls of using complex finite-element- and boundary-element numerical techniques to predict high-order near-field ship signatures will be discussed, followed by a short description of the design and testing of complementary physical scale models. Extrapolation of measured magnetic signatures from testing environments to threat areas using semi-empirical math models will be presented, along with an explanation of their inherent instabilities and methods for regularizing them. These magnetic ship signature modeling techniques are used today in designing optimized signature reduction systems that have a minimum impact on ships and their systems. The discussion will be closed with an important discussion of the verification and validation of magnetic models of surface ships and submarines.
Book Synopsis Modeling a Ship’s Ferromagnetic Signatures by : John Holmes
Download or read book Modeling a Ship’s Ferromagnetic Signatures written by John Holmes and published by Springer Nature. This book was released on 2022-05-31 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferromagnetic models of ships and submarines that predict or reproduce their magnetic signatures have found applications in the development of both offensive and defensive military systems from World War II to the present. The mathematical basis of generalized coordinate systems will be presented and demonstrated with example applications to analytic spherical and prolate spheroidal magnetic ship models. In addition, the advantages and pitfalls of using complex finite-element- and boundary-element numerical techniques to predict high-order near-field ship signatures will be discussed, followed by a short description of the design and testing of complementary physical scale models. Extrapolation of measured magnetic signatures from testing environments to threat areas using semi-empirical math models will be presented, along with an explanation of their inherent instabilities and methods for regularizing them. These magnetic ship signature modeling techniques are used today in designing optimized signature reduction systems that have a minimum impact on ships and their systems. The discussion will be closed with an important discussion of the verification and validation of magnetic models of surface ships and submarines.
Download or read book HSMV 2023 written by E. Begovic and published by IOS Press. This book was released on 2023-11-09 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: A growing awareness for sustainable mobility and the importance of reducing greenhouse gas emissions call for immediate action in the maritime industry. Technical improvements, such as the hydrodynamic optimization, innovations in energy saving devices, new propulsion systems and power supplies can contribute to such achievements. This challenge is even more demanding for high speed marine craft. This book presents the proceedings of HSMV2023, the 13th International Symposium on High Speed Marine Vehicles, held from 23 to 25 October 2023 in Naples, Italy. The conference attracts academics, researchers, designers, operators and shipowners. It provides a platform for the presentation and discussion of developments in the design, construction and operation of high speed marine vessels. More than 40 submissions were received; 27 papers were selected for presentation and publication in this book after a rigorous review process. The book provides an overview of current innovations and developments, and can be a reference for all those working in the field of high-speed marine vehicles.
Book Synopsis The proceedings of the 16th Annual Conference of China Electrotechnical Society by : Xidong Liang
Download or read book The proceedings of the 16th Annual Conference of China Electrotechnical Society written by Xidong Liang and published by Springer Nature. This book was released on 2022-04-22 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers outstanding papers presented at the 16th Annual Conference of China Electrotechnical Society, organized by China Electrotechnical Society (CES), held in Beijing, China, from September 24 to 26, 2021. It covers topics such as electrical technology, power systems, electromagnetic emission technology, and electrical equipment. It introduces the innovative solutions that combine ideas from multiple disciplines. The book is very much helpful and useful for the researchers, engineers, practitioners, research students, and interested readers.
Book Synopsis The Legacy of the White Oak Laboratory by :
Download or read book The Legacy of the White Oak Laboratory written by and published by . This book was released on 2000 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Navy's N-Layer Magnetic Model with Application to Naval Magnetic Demining by : Sam Poteete
Download or read book Navy's N-Layer Magnetic Model with Application to Naval Magnetic Demining written by Sam Poteete and published by . This book was released on 2010 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Navy and Marine Corps' Forward ... From the Sea strategic concept has expanded naval operations from open-ocean, blue-water combat environments to the littoral regions in which naval mines can both be an extremely menacing threat to U.S. forces and an effective force multiplier for the Fleet. The Navy/Marine Corps must have efficient Mine Warfare (MIW) forces to ensure the Fleet can carry out operations in the open ocean and littorals, including maintaining open sea lanes of communication and supporting Ship-to- Objective Maneuver Warfare from the Sea while denying operating areas to the enemy. Every ship has a magnetic signature, which is caused by its iron and steel components. Additionally, the earth's natural magnetic field induces a magnetization in a ship depending on its latitude, longitude, and heading. Exploitation of surface ship and submarine magnetic field signatures by naval influence mines has occurred throughout time. In order to calculate the swept path width for magnetic minesweeping systems currently in use by the U.S. Mine Warfare (MIW) forces, it is necessary to calculate the vector components of the magnetic field strength which are generated by each of several possible system configurations. The Navy's Magnetic Model addresses this needed capability. The Navy's N-Layer Magnetic Model (NLMM) is used to predict the expected performance of magnetic minesweeping equipment in a complex environment consisting of N layers, each with arbitrary conductivity and thickness. The model is used to compute the magnetic field strength produced by various U.S. Navy magnetic minesweeping configurations using a random environmental vertical conductivity structure. To better determine which parameters had the greatest effect on the model, and which could be simplified or enhanced, a series of tests were run on actual data sets.
Download or read book Naval Engineers Journal written by and published by . This book was released on 1982 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field Measurement of Surface Ship Magnetic Signature Using Multiple AUVs by :
Download or read book Field Measurement of Surface Ship Magnetic Signature Using Multiple AUVs written by and published by . This book was released on 2009 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An effort has been initiated to develop a portable system capable of measuring the magnetic signature of a surface ship. The system will employ a formation of multiple AUVs, each equipped with a magnetometer. The objective is to measure total magnetic field at specified locations relative to the surface ship. In the first step of system development, an Autonomous Underwater Vehicle (AUV) has been equipped with a tri-axial fluxgate magnetometer and used to perform preliminary magnetic field measurements. Measurements of this type will be used to calibrate an individual AUV/magnetometer system. Initial measurements appear to meet necessary measurement requirements on noise floor as the standard deviation of the indicated total magnetic field was observed to be 21nT while the AUV proceeded on a straight, level path. Extended Kalman Filters (EKF) are being developed for on-board AUV navigation and post-processing a best estimate for AUV vehicle position. Navigation experiments were conducted to evaluate AUV navigation and position estimation. In these experiments, an independent high-accuracy topside-track system was used to provide ground-truth for comparison. The average error in the on-board estimated position of the AUV used for navigation was 1.84m. The post processing EKF was designed to use all available sensor data. This EKF had an average position error of 0.74m when compared to the ground-truth. Overall, the AUV was able to navigate to an average distance of 1.95m from its desired waypoint track.
Book Synopsis Introduction to Camouflage and Deception by : J. V. Ramana Rao
Download or read book Introduction to Camouflage and Deception written by J. V. Ramana Rao and published by . This book was released on 1999 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Committee on Technology for Future Naval Forces Publisher :National Academies ISBN 13 : Total Pages :138 pages Book Rating :4.1/5 (623 download)
Book Synopsis Technology for the United States Navy and Marine Corps, 2000-2035: Becoming a 21st-Century Force by : Committee on Technology for Future Naval Forces
Download or read book Technology for the United States Navy and Marine Corps, 2000-2035: Becoming a 21st-Century Force written by Committee on Technology for Future Naval Forces and published by National Academies. This book was released on 1997-09-02 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: After v. 1, each volume's t.p. names a different panel at the beginning of its author statement.
Book Synopsis The Effect of Ship Motion on Ship Magnetic Signature by : P. J. Ryan
Download or read book The Effect of Ship Motion on Ship Magnetic Signature written by P. J. Ryan and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship & Boat International written by and published by . This book was released on 1986 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ship Magnetism and the Magnetic Compass by : F. G. Merrifield
Download or read book Ship Magnetism and the Magnetic Compass written by F. G. Merrifield and published by Elsevier. This book was released on 2014-05-09 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ship Magnetism and the Magnetic Compass deals with the magnetism of ships and the deviation of the magnetic compass produced by this magnetism. Emphasis is placed on the distinction between the deviation itself and what causes the deviation. Numerous worked examples for exercise are found at the end of each chapter. Comprised of 15 chapters, this volume begins with an introduction to magnetometry, paying particular attention to the magnitude of the forces involved in magnetism and the manner in which these forces act. The strength of a magnetic pole is also considered, along with the angle of deflection of the needle when in two magnetic fields. Subsequent chapters offer a thorough treatment of the strength of the magnetic field and the magnet's moment of inertia and magnetic moment; the earth's magnetic force; and how the different parts of the ship's magnetic force give different types of deviation. The book also explains the heeling error and its causes; the principle underlying successful compass adjustment; the effect of the ship's magnetic forces on the directive force felt by the compass needles; and sub-permanent magnetism. This monograph will be of value to students and practitioners interested in ship magnetism and the magnetic compass.
