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Journal articles on the topic 'Electromagnetical systems'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Rodriguez, Lara, Christian Pinedo, Igor Lopez, Marina Aguado, Jasone Astorga, Marivi Higuero, Iñigo Adin, Guillermo Bistué, and Jaizki Mendizabal. "Eurobalise-Train communication modelling to assess interferences in railway control signalling systems." Network Protocols and Algorithms 8, no. 1 (May 10, 2016): 58. http://dx.doi.org/10.5296/npa.v8i1.8731.

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The evolution of the railway sector depends, to a great extent, on the deployment of advanced railway signalling systems. These signalling systems are based on communication architectures that must cope with complex electromagnetical environments. This paper is outlined in the context of developing the necessary tools to allow the quick deployment of these signalling systems by contributing to an easier analysis of their behaviour under the effect of electromagnetical interferences. Specifically, this paper presents the modelling of the Eurobalise-train communication flow in a general purpose simulation tool. It is critical to guarantee this communication link since any lack of communication may lead to a stop of the train and availability problems. In order to model precisely this communication link we used real measurements done in a laboratory equipped with elements defined in the suitable subsets. Through the simulation study carried out, we obtained performance indicators of the physical layer such as the received power, SNR and BER. The modelling presented in this paper is a required step to be able to provide quality of service indicators related to perturbed scenarios.

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2

Chen, Kuo-Shen, Tian-Shiang Yang, and Jui-Feng Yin. "Residual Vibration Suppression for Duffing Nonlinear Systems With Electromagnetical Actuation Using Nonlinear Command Shaping Techniques." Journal of Vibration and Acoustics 128, no. 6 (March 3, 2006): 778–89. http://dx.doi.org/10.1115/1.2203340.

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Residual vibration control is crucial for numerous applications in precision machinery with negligible damping such as magnetically actuated systems. In certain magnetically actuated applications, the systems could also be highly nonlinear and conditionally stable. Although traditional command shaping techniques work well for linear and weakly nonlinear systems, they show little effects for dealing with systems with both strong structural and actuation nonlinearities. In this paper, a general input shaper design methodology for single degree of freedom systems with both Duffing spring and electromagnetic forcing nonlinearities is successfully devised using an energy approach. Following this method, two-step and three-step shapers are developed, which in the linear limit reduce to the traditional zero-vibration (ZV) and zero-vibration-and-derivative (ZVD) shapers, respectively. The robustness of these nonlinear shapers is investigated numerically through several case studies and the results show that the three-step shaper is sufficiently robust to resist significant amounts of parameter variations without exciting significant residual vibration. The two-step shaper, however, is somewhat less robust with respect to parameter variations. Meanwhile, an electromagnetically driven Duffing mechanical system is also constructed so that the performances and robustness of the nonlinear shapers in vibration suppression can be examined. It is shown that the nonlinear shapers result in a significant improvement in residual vibration suppression and settling time reduction in comparison with the traditional linearized ZV and ZVD shapers.

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3

Fang, Daoyuan, Xiaojun Lu, and Michael Reissig. "High-order energy decay for structural damped systems in the electromagnetical field." Chinese Annals of Mathematics, Series B 31, no. 2 (February 2, 2010): 237–46. http://dx.doi.org/10.1007/s11401-008-0185-8.

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4

Aikeyeva, Altyn A., Bakhyt A. Zhautikov, Kanat M. Makhanov, Aigerim R. Tanskozhanova, Perizat A. Mukhtarova, and Arailym E. Ayubekova. "The Development of Control Systems Electromagnetic Lifting Installation." International Journal of Materials, Mechanics and Manufacturing 6, no. 1 (February 2018): 45–50. http://dx.doi.org/10.18178/ijmmm.2018.6.1.345.

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5

Lim, Ik-Sung, Robert O. Grondin, and Samir El-Ghazaly. "Ensemble Monte Carlo and Full-Wave Electrodynamic Models Implemented Self-Consistently on a Parallel Processor Using Perfectly Matched Layer Boundary Conditions." VLSI Design 8, no. 1-4 (January 1, 1998): 129–33. http://dx.doi.org/10.1155/1998/97242.

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We have been using a self-consistent formulation of full-wave electromagnetic solvers and ensemble Monte Carlo techniques to model ultrafast photoconductivity. Our simulations are running on a MasPar machine. This paper will address aspects ofthis simulation which may interest workers who are simulating not only photoconductive systems but other systems as well which involve electrodynamics, waves and wave phenomena and ensemble Monte Carlo transport models. In particular, we will report on the inclusion of perfectly matched layer approaches to absorbing boundary conditions for electromagnetic waves. These have in the past several years become widely used in computational electromagnetics codes because they reduce error due to spurious numerical wave reflection off of an absorbing boundary by several orders of magnitude. We will also address the issue of computational cost and show that a full-wave electromagnetic approach is more competitive with a Poisson's equation approach than one might believe. Lastly, our system has the feature that the active portion where the electrons and holes lie is in fact a small fraction of the total experimental system's volume. Unless care is exerted one either has a very significant load imbalance problem or high communications overhead. We compare two different tradeoffs between load imbalance and communications overhead.

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6

Zanatta, Ana Paula, Ben Hur Bandeira Boff, Paulo Roberto Eckert, Aly Ferreira Flores Filho, and David George Dorrell. "Tubular linear permanent magnet synchronous machine applied to semi-active suspension systems." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (September 3, 2018): 1781–94. http://dx.doi.org/10.1108/compel-01-2018-0022.

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Purpose Semi-active suspension systems with electromagnetic dampers allow energy regeneration and the required control strategies are easier to implement than the active suspensions are. This paper aims to address the application of a tubular linear permanent magnet synchronous machine for a semi-active suspension system. Design/methodology/approach Classical rules of mechanics and electromagnetics were applied to describe a dynamic model combining vibration and electrical machines theories. A multifaceted MATLAB®/Simulink model was implemented to incorporate equations and simulate global performance. Experimental tests on an actual prototype were carried out to investigate displacement transmissibility of the passive case. In addition, simulation results were shown for the dissipative semi-active case. Findings The application of the developed model suggests convergent results. For the passive case, numerical and experimental outcomes validate the parameters and confirm system function and proposed methodology. MATLAB®/Simulink results for the semi-active case are consistent, showing an improvement on the displacement transmissibility. These agree with the initial conceptual thoughts. Originality/value The use of linear electromagnetic devices in suspension systems is not a novel idea. However, most published papers on this subject outline active solutions, neglect semi-active ones and focus on experimental studies. However, here a dynamic mechanical-electromagnetic coupled model for a semi-active suspension system is reported. This is in conjunction with a linear electromagnetic damper.

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7

CROWNE, FRANK J., WILLIAM M. GOLDING, and CLIFFORD HAZELTON. "TERAHERTZ-BASED DETECTORS USING COLD-ATOM OPTICS." International Journal of High Speed Electronics and Systems 17, no. 04 (December 2007): 789–800. http://dx.doi.org/10.1142/s0129156407004989.

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In this paper we explore the design of microwave-based structures that can enhance the interaction of electromagnetic fields with cold-atom ensembles, leading to novel sensing modalities based on the quantum-mechanical behavior of these systems. In particular, we discuss electromagnetically-induced transparency in a single uncondensed cold-atom cloud, and a two-cloud version of a SQUID, where the clouds are BEC's and take the place of the weakly coupled superconductors. These systems are both promising candidates for use in the high-precision detection of chemical contaminants.

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8

GHERMAN, Laurian, Marian PEARSICA, Constantin STRÎMBU, and Cristian-George CONSTANTINESCU. "A THEORETICAL APPROACH OF A NEW ELECTROMAGNETIC LAUNCH SYSTEM." Review of the Air Force Academy 14, no. 2 (December 8, 2016): 69–82. http://dx.doi.org/10.19062/1842-9238.2016.14.2.9.

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9

Cherno, O. O., and M. Yu Monchenko. "ENERGY EFFICIENCY OF THE VIBRATORY DEVICE ELECTROMAGNETIC DRIVE SYSTEM." Tekhnichna Elektrodynamika 2016, no. 1 (January 22, 2016): 20–25. http://dx.doi.org/10.15407/techned2016.01.020.

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10

Sun, Yi, Wenzhong Lou, Hengzhen Feng, and Yuecen Zhao. "Study on Characteristics of Electromagnetic Coil Used in MEMS Safety and Arming Device." Micromachines 11, no. 8 (July 31, 2020): 749. http://dx.doi.org/10.3390/mi11080749.

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Traditional silicon-based micro-electro-mechanical system (MEMS) safety and arming devices, such as electro-thermal and electrostatically driven MEMS safety and arming devices, experience problems of high insecurity and require high voltage drive. For the current electromagnetic drive mode, the electromagnetic drive device is too large to be integrated. In order to address this problem, we present a new micro electromagnetically driven MEMS safety and arming device, in which the electromagnetic coil is small in size, with a large electromagnetic force. We firstly designed and calculated the geometric structure of the electromagnetic coil, and analyzed the model using COMSOL multiphysics field simulation software. The resulting error between the theoretical calculation and the simulation of the mechanical and electrical properties of the electromagnetic coil was less than 2% under the same size. We then carried out a parametric simulation of the electromagnetic coil, and combined it with the actual processing capacity to obtain the optimized structure of the electromagnetic coil. Finally, the electromagnetic coil was processed by deep silicon etching and the MEMS casting process. The actual electromagnetic force of the electromagnetic coil was measured on a micro-mechanical test system, compared with the simulation, and the comparison results were analyzed.

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11

Bajpai, Shrish, Siddiqui Sajida Asif, and Syed Adnan Akhtar. "Electromagnetic Education in India." Comparative Professional Pedagogy 6, no. 2 (June 1, 2016): 60–66. http://dx.doi.org/10.1515/rpp-2016-0020.

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Abstract Out of the four fundamental interactions in nature, electromagnetics is one of them along with gravitation, strong interaction and weak interaction. The field of electromagnetics has made much of the modern age possible. Electromagnets are common in day-to-day appliances and are becoming more conventional as the need for technology increases. Electromagnetism has played a vital role in the progress of human kind ever since it has been understood. Electromagnets are found everywhere. One can find them in speakers, doorbells, home security systems, anti-shoplifting systems, hard drives, mobiles, microphones, Maglev trains, motors and many other everyday appliances and products. Before diving into the education system, it is necessary to reiterate its importance in various technologies that have evolved over time. Almost every domain of social life has electromagnetic playing its role. Be it the mobile vibrators you depend upon, a water pump, windshield wipers during rain and the power windows of your car or even the RFID tags that may ease your job during shopping. A flavor of electromagnetics is essential during primary level of schooling for the student to understand its future prospects and open his/her mind to a broad ocean of ideas. Due to such advancements this field can offer, study on such a field is highly beneficial for a developing country like India. The paper presents the scenario of electromagnetic education in India, its importance and numerous schemes taken by the government of India to uplift and acquaint the people about the importance of EM and its applications.

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12

Macnae, James. "Airborne Electromagnetic Systems." ASEG Extended Abstracts 2007, no. 1 (December 1, 2007): 1–4. http://dx.doi.org/10.1071/aseg2007ab082.

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13

Cheng-Tsung Liu, Sheng-Yang Lin, Weng-Jay Lee, and Jen-Hsin Chen. "Electromagnetic Stirring Systems." IEEE Industry Applications Magazine 17, no. 2 (March 2011): 38–43. http://dx.doi.org/10.1109/mias.2010.939813.

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14

Sykulski, J. "Computational electromagnetics for design optimisation: the state of the art and conjectures for the future." Bulletin of the Polish Academy of Sciences: Technical Sciences 57, no. 2 (June 1, 2009): 123–31. http://dx.doi.org/10.2478/v10175-010-0112-5.

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Computational electromagnetics for design optimisation: the state of the art and conjectures for the futureThe paper reviews the state of the art in modern field simulation techniques available to assist in the design and performance prediction of electromechanical and electromagnetic devices. Commercial software packages, usually exploiting finite element and/or related techniques, provide advanced and reliable tools for every-day use in the design office. At the same time Computational Electromagnetics continues to be a thriving area of research with emerging new techniques and methods, in particular for multi-physics applications and in the area of multi-objective optimisation.

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15

Blanken, P. G., and J. J. L. M. Van Vlerken. "Modeling of electromagnetic systems." IEEE Transactions on Magnetics 27, no. 6 (November 1991): 4509–15. http://dx.doi.org/10.1109/20.278672.

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16

Hammond, P. "Linear Motion Electromagnetic Systems." Electronics and Power 32, no. 2 (1986): 169. http://dx.doi.org/10.1049/ep.1986.0095.

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17

Charreyron, Samuel L., Quentin Boehler, Byungsoo Kim, Cameron Weibel, Christophe Chautems, and Bradley J. Nelson. "Modeling Electromagnetic Navigation Systems." IEEE Transactions on Robotics 37, no. 4 (August 2021): 1009–21. http://dx.doi.org/10.1109/tro.2020.3047053.

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18

Kubota, Sachio, and Yoshihiro Shimaoka. "Development of Power Supply Suitable for Electromagnetic Propulsion System Using High Frequency AC." Journal of The Japan Institute of Marine Engineering 46, no. 1 (2011): 93–98. http://dx.doi.org/10.5988/jime.46.93.

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19

Lee, Seong Kon. "Feasibility Study of ROV-Towed Marine Loop Electromagnetic System through Off-Shore Experiment." Journal of the Korean Society of Mineral and Energy Resources Engineers 49, no. 6 (2012): 766. http://dx.doi.org/10.12972/ksmer.2012.49.6.766.

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20

Putri, Aryanti Kusuma, Rüdiger Appunn, and Kay Hameyer. "Modelling of non-linear losses in an integrated contactless power supply for magnetically levitated elevator systems using discrete circuit elements." Archives of Electrical Engineering 64, no. 2 (June 1, 2015): 177–87. http://dx.doi.org/10.1515/aee-2015-0015.

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Abstract A contactless energy transmission system is essential to supply onboard systems of electromagnetically levitated vehicles without physical contact to the guide rail. One of the possibilities to realise a contactless power supply (CPS) is by integrating the primary actuator into the guide rail of an electromagnetic guiding system (MGS). The secondary actuator is mounted on the elevator car. During the energy transmission, load dependent non-linear losses occur in the guide rail. The additional losses, which are caused by the leakage flux penetrating into the guide rail, cannot be modelled using the classical approach of iron losses in the equivalent circuit of a transformer, which is a constant parallel resistance to the mutual inductance. This paper introduces an approach for modelling the load dependent non-linear losses occurring in the guide rail using additional variable discrete circuit elements

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21

Gao, Wei Jing, Li Zheng Li, and Wei Shao Peng. "Modeling of Electromagnetic Heating Systems." Advanced Materials Research 383-390 (November 2011): 2231–36. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2231.

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Starting with the Maxwell equations, this article introduces the heating power as intermediate variable to modeling of electromagnetic heating system, and gets a non-linear model. Concludes that the ralationship between the heat power and the input current is nonlinear, the temperature and the heating power is the first order linear relationship. The model has importance significances for improving the stability and accuracy of the electromanetic heating system .

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22

Pevchev, V. P., and A. K. Kudinov. "Equivalent circuits of electromagnetic systems." Russian Electrical Engineering 83, no. 3 (March 2012): 150–53. http://dx.doi.org/10.3103/s106837121203011x.

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23

Baldomir, D., and P. Hammond. "Global geometry of electromagnetic systems." IEE Proceedings A Science, Measurement and Technology 140, no. 2 (1993): 142. http://dx.doi.org/10.1049/ip-a-3.1993.0023.

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24

Vance, Edward F. "ELECTROMAGNETIC INTERACTION WITH LARGE SYSTEMS." Electromagnetics 6, no. 1 (January 1986): 61–72. http://dx.doi.org/10.1080/02726348608915200.

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25

Kresin, Vladimir Z. "Electromagnetic properties of proximity systems." Physical Review B 32, no. 1 (July 1, 1985): 145–52. http://dx.doi.org/10.1103/physrevb.32.145.

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26

Berg, H. "Electromagnetic Interaction with Biological Systems." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 321, no. 2 (October 1991): 369–70. http://dx.doi.org/10.1016/0022-0728(91)85615-v.

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27

Comay, E. "Parity nonconservation in electromagnetic systems." International Journal of Theoretical Physics 31, no. 11 (November 1992): 2035–42. http://dx.doi.org/10.1007/bf00671971.

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28

Berg, H. "Electromagnetic Interaction with Biological Systems." Bioelectrochemistry and Bioenergetics 26, no. 2 (October 1991): 369–70. http://dx.doi.org/10.1016/0302-4598(91)80043-3.

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29

McGary, J. E., J. Chen, and Z. Xiong. "Electromagnetic Tracking for Tomotherapy Systems." International Journal of Radiation Oncology*Biology*Physics 84, no. 3 (November 2012): S716. http://dx.doi.org/10.1016/j.ijrobp.2012.07.1916.

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30

Giorgi, Claudio, and Elena Vuk. "Extremum principles in electromagnetic systems." Rendiconti del Circolo Matematico di Palermo 48, no. 2 (June 1999): 265–84. http://dx.doi.org/10.1007/bf02857303.

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31

Tkachuk, Igor, and Mykhailo Kovalenko. "Electromagnetic reducers in electromechanical systems." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (5) (May 28, 2021): 42–46. http://dx.doi.org/10.20998/2079-3944.2021.1.08.

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Currently, due to the rising cost of electricity, low-power wind turbines (1-5 kW) are often used to supply consumers with electricity. In this case, wind turbines are used with both horizontal and vertical axes of rotation, the speed of which at an average wind speed V = 5 ÷ 10 m / s and is quite low, and is approximately n = 100 - 300 rpm. A low-speed electric generator for a wind generator with such a speed of rotation with a direct connection of the wind rotor shaft and the electric generator has a large number of poles and reaches a fairly large size. Therefore, magnifying gears (multiplexers) are often used and can increase the speed of the electric generator several times and, thus, reduce the mass of its active part, because the electromagnetic moment is proportional to the volume of the electric machine. However, manual transmissions are a source of additional noise, require frequent maintenance and reduce the durability of the wind turbine. This article will use permanent magnet reducers for wind turbines, which, unlike mechanical reducers, do not create additional noise, do not require lubrication, their durability is higher, operating costs are also significantly reduced, while the magnetic reducer can be integrated with an electric generator. at a wind rotor power P = 4 kW and speed n = 100-300 rpm, high-speed electric generator and magnetic reducer have approximately 2 times less total weight of magnets and 1.7 times less total weight of active materials (magnetic reducer + electric generator) than a low-speed multipole external generator. The aim of the study is to develop and implement an electromagnetic reducer in electromechanical systems. The basis of such systems are high-coercive magnets. To achieve this goal, the following tasks are set: - literary-patent search on the research topic; - selection of a prototype of a magnetic reducer and calculation of its main parameters; - development of graphical and numerical models to evaluate the effectiveness of the developed prototype; - optimization of the design of the magnetic reducer; - development of a system for converting mechanical energy with low potential into electricity; - prototyping and experimental studies of the system of conversion of mechanical energy with low potential into electrical energy

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Sukhorukov, V. I., I. A. Serbinenko, A. N. Korsunov, Y. V. Bovt, L. P. Zabrodina, L. N. Litvinenko, O. V. Budanov, et al. "Proposals for the ISS: «Reliability» Experiment Influence of low-frequency atmospheric electrical processes and near-space electromagnetic signals on the central nervous system functional condition of a man maintaining space systems." Kosmìčna nauka ì tehnologìâ 6, no. 4 (July 30, 2000): 71–72. http://dx.doi.org/10.15407/knit2000.04.071.

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33

Zhang, Xueqian, Quan Xu, Quan Li, Yuehong Xu, Jianqiang Gu, Zhen Tian, Chunmei Ouyang, et al. "Asymmetric excitation of surface plasmons by dark mode coupling." Science Advances 2, no. 2 (February 2016): e1501142. http://dx.doi.org/10.1126/sciadv.1501142.

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Control over surface plasmons (SPs) is essential in a variety of cutting-edge applications, such as highly integrated photonic signal processing systems, deep-subwavelength lasing, high-resolution imaging, and ultrasensitive biomedical detection. Recently, asymmetric excitation of SPs has attracted enormous interest. In free space, the analog of electromagnetically induced transparency (EIT) in metamaterials has been widely investigated to uniquely manipulate the electromagnetic waves. In the near field, we show that the dark mode coupling mechanism of the classical EIT effect enables an exotic and straightforward excitation of SPs in a metasurface system. This leads to not only resonant excitation of asymmetric SPs but also controllable exotic SP focusing by the use of the Huygens-Fresnel principle. Our experimental findings manifest the potential of developing plasmonic metadevices with unique functionalities.

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34

Yunas, Jumril, Budi Mulyanti, Ida Hamidah, Muzalifah Mohd Said, Roer Eka Pawinanto, Wan Amar Fikri Wan Ali, Ayub Subandi, Azrul Azlan Hamzah, Rhonira Latif, and Burhanuddin Yeop Majlis. "Polymer-Based MEMS Electromagnetic Actuator for Biomedical Application: A Review." Polymers 12, no. 5 (May 22, 2020): 1184. http://dx.doi.org/10.3390/polym12051184.

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In this study, we present a comprehensive review of polymer-based microelectromechanical systems (MEMS) electromagnetic (EM) actuators and their implementation in the biomedical engineering field. The purpose of this review is to provide a comprehensive summary on the latest development of electromagnetically driven microactuators for biomedical application that is focused on the movable structure development made of polymers. The discussion does not only focus on the polymeric material part itself, but also covers the basic mechanism of the mechanical actuation, the state of the art of the membrane development and its application. In this review, a clear description about the scheme used to drive the micro-actuators, the concept of mechanical deformation of the movable magnetic membrane and its interaction with actuator system are described in detail. Some comparisons are made to scrutinize the advantages and disadvantages of electromagnetic MEMS actuator performance. The previous studies and explanations on the technology used to fabricate the polymer-based membrane component of the electromagnetically driven microactuators system are presented. The study on the materials and the synthesis method implemented during the fabrication process for the development of the actuators are also briefly described in this review. Furthermore, potential applications of polymer-based MEMS EM actuators in the biomedical field are also described. It is concluded that much progress has been made in the material development of the actuator. The technology trend has moved from the use of bulk magnetic material to using magnetic polymer composites. The future benefits of these compact flexible material employments will offer a wide range of potential implementation of polymer composites in wearable and portable biomedical device applications.

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Tsutsaeva, A. A. "«Electromagnetic Radiation» Experiment Study of the negative influence of electromagnetic radiation produced by radio electronic devices on board the iss on the homeostatic system of astronauts." Kosmìčna nauka ì tehnologìâ 6, no. 4 (July 30, 2000): 128. http://dx.doi.org/10.15407/knit2000.04.145.

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Paś, Jacek. "The impact of strong electromagnetic pulses generated in a targeted manner on the process of operation of electronic devices and systems." WUT Journal of Transportation Engineering 124 (March 1, 2019): 141–50. http://dx.doi.org/10.5604/01.3001.0013.7183.

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The article presents the basic issues related to the influence of electromagnetic interference on electronic devices used in transport telematics systems. Classification methods for electronic devices and systems in the aspect of interference of strong high frequency (HF) electromagnetic pulses depend on technical parameters of the interfering signals. Generated, strong electromagnetic pulses in this frequency range may be generated purposefully - as intended signals, e.g. to disable electronic devices and systems used in vast transportation areas. Currently, designers and users of electronic devices and systems do not include the possibility of accumulated interference of strong electromagnetic pulses during operation. Current standard and acts do not provide any requirements determining e.g. resistance and susceptibility to high frequency electromagnetic waves. The author recommends including the selected technical solutions and safety indices in operation. Results and calculations presented in the paper prove that it is possible to defend against the threat upon occurrence of strong electromagnetic pulses, already during the design stage of devices and systems.

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Tohari, Mariam M., Moteb M. Alqahtani, and Andreas Lyras. "Optical Multistability in the Metal Nanoparticle–Graphene Nanodisk–Quantum Dot Hybrid Systems." Nanomaterials 10, no. 9 (August 27, 2020): 1687. http://dx.doi.org/10.3390/nano10091687.

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Hybrid nanoplasmonic systems can provide a promising platform of potential nonlinear applications due to the enhancement of optical fields near their surfaces in addition to the control of strong light–matter interactions they can afford. We theoretically investigated the optical multistability of a probe field that circulated along a unidirectional ring cavity containing a metal nanoparticle–graphene nanodisk–quantum dot hybrid system; the quantum dot was modeled as a three-level atomic system of Lambda configuration interacting with probe and control fields in the optical region of the electromagnetic spectrum. We show that the threshold and degree of multistability can be controlled by the geometry of the setup, the size of metal nanoparticles, the carrier mobility in the graphene nanodisk and the detunings of probe and control fields. We found that under electromagnetically-induced transparency conditions the system exhibits enhanced optical multistability with an ultralow threshold in the case of two-photon resonance with high carrier mobility in the graphene nanodisk. Moreover, we calculated the limits of the controllable parameters within which the switching between optical multistability and bistability can occur. We show that our proposed hybrid plasmonic system can be useful for efficient all-optical switches and logic-gate elements for quantum computing and quantum information processing.

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38

Poljak, Dragan, Silvestar Šesnić, Mario Cvetković, Anna Šušnjara, Hrvoje Dodig, Sébastien Lalléchère, and Khalil El Khamlichi Drissi. "Stochastic Collocation Applications in Computational Electromagnetics." Mathematical Problems in Engineering 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/1917439.

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The paper reviews the application of deterministic-stochastic models in some areas of computational electromagnetics. Namely, in certain problems there is an uncertainty in the input data set as some properties of a system are partly or entirely unknown. Thus, a simple stochastic collocation (SC) method is used to determine relevant statistics about given responses. The SC approach also provides the assessment of related confidence intervals in the set of calculated numerical results. The expansion of statistical output in terms of mean and variance over a polynomial basis, via SC method, is shown to be robust and efficient approach providing a satisfactory convergence rate. This review paper provides certain computational examples from the previous work by the authors illustrating successful application of SC technique in the areas of ground penetrating radar (GPR), human exposure to electromagnetic fields, and buried lines and grounding systems.

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39

Tomita, Yoshiyuki, and Yasushi Koyanagawa. "Study on a Surface-Motor Driven Precise Positioning System." Journal of Dynamic Systems, Measurement, and Control 117, no. 3 (September 1, 1995): 311–19. http://dx.doi.org/10.1115/1.2799121.

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A newly developed precise positioning system incorporating a surface-motor (SFM) drive unit is presented and its advantageous features, operation principles, electromagnetic drive force design, and some experimental results are described. The stage of our “SFM positioning system” is levitated on a base plate by three air bearing pads; being driven by three brushless-type linear DC motors in three degrees of freedom. The guidance and positioning of the stage’s planar motion are achieved via the simultaneous operation of three identical proportional-integral-derivative (PID) servo-control systems, each having a laser-interferometer position feedback loop. The electromagnetically produced drive forces are analyzed by employing magnetic permeability theory, with good correspondence being obtained between calculated and experimental results. Additionally discussed is the closed-loop dynamic behavior, including the motion caused by three axis-interference. Evaluations of experimental tests indicate that a positioning resolution of 10–20 nm and yaw angle accuracy less than ±0.08 µrad are successfully achieved for an x-y travel range of 10 mm.

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Shim, Youngtack. "ELECTROMAGNETICALLY-COUNTERED SPEAKER SYSTEMS AND METHODS." Journal of the Acoustical Society of America 131, no. 4 (2012): 3192. http://dx.doi.org/10.1121/1.4707452.

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Shim, Youngtack, and Port Moody. "Electromagnetically-Shielded Speaker Systems And Methods." Journal of the Acoustical Society of America 130, no. 5 (2011): 3172. http://dx.doi.org/10.1121/1.3662347.

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Zhao, Xiao Gang, Yi Zhou, Yu Zhang Guo, Zi Jun Lin, and Jian Cheng Zhu. "Research on the New Multilayer Composite Lightning Electromagnetic Shielding Materials." Applied Mechanics and Materials 217-219 (November 2012): 717–20. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.717.

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According to the characteristics of lightning electromagnetic pulse (LEMP) in information systems, the new multilayer composite electromagnetic shielding materials are utilized for the effective protection of the lightning hazards. The lightning protection mechanism and the characteristics of the new electromagnetic shielding materials are investigated. The shielding and reflection principle of the new materials are carried out. The electromagnetic shielding tent which is made of such multilayer composite electromagnetic shielding materials are applied in the integrated lightning protection of information systems, which shows such materials are safe, convenient, practical and worthy of widely application.

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Raniszewski, Grzegorz. "Optimization of the carbon nanotubes synthesis in arc discharge systems." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (September 3, 2018): 1618–25. http://dx.doi.org/10.1108/compel-01-2018-0019.

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Purpose The purpose of this paper is to focus on the influence of electromagnetic field during the arc discharge carbon nanotubes synthesis. It proposes modeling of electromagnetic field distribution to calculate forces in the area of arcing. The paper presents the influence of this field on the final product of the synthesis. Design/methodology/approach A short literature review of the arc discharge systems supported by electromagnetic field is presented. The technical solution of the coil placement is discussed. An experimental research is described. The research system constructed preceded by a series of measurements and modeling is analyzed. Findings The paper describes the significant meaning of the electromagnetic field during the synthesis. The electromagnetic field forces the slow rotation of the carbon plasma column where carbon nanotubes are formed. It leads to the improvement in yield. Research limitations/implications Because the research is limited to one type of geometry of the reactor, the results may vary in different reactors. However, the influence of the electromagnetic field is confirmed. Therefore, researchers are encouraged to investigate the influence of the electromagnetic coil in the applied systems. Practical implications The systems with a coil inside the reactor require the application of complex cooling systems or/and additional screens. The work proposes a technical solution based on the coil placed outside the reactor. Therefore, it simplifies the construction and increases the yield. Social implications The high yield of the high-quality nanotubes opens new technical possibilities for electronics and electrical engineering. Originality/value The paper identifies a connection between the electromagnetic field, the arc discharge movement, plasma jet, carbon nanotubes containing deposit and the yield.

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Siergiejczyk, Mirosław, Adam Rosiński, and Jacek Paś. "Electromagnetic Interference Issue in Safety Systems Applied at Airports." Journal of KONBiN 49, no. 1 (March 1, 2019): 299–312. http://dx.doi.org/10.2478/jok-2019-0015.

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Abstract The proper operation of electronic devices used in transport facilities is possible by protecting them against the effect of adverse electromagnetic fields. At present, all kinds of facilities, including critical infrastructure facilities, intended for functioning in peace conditions and emergency states, are equipped with power systems and numerous electronic devices, including electronic safety systems. On the basis of observing the process of their operation, it can be concluded that an artificially generated intended or unintended electromagnetic field, within various frequency ranges, may negatively affect the operation of electronic devices. It was found that the operation of the electronic safety systems applied at airports may be subject to interference as a result of the impact of adverse electromagnetic fields. Therefore, it is necessary to analyse the impact of electromagnetic interference on the operation of these systems. This article presents a developed author’s operation process model including electromagnetic interference within low frequencies. The reliability and operation analysis of the electronic safety systems carried out by the authors allows for numerical assessment of various types of solutions – both technical and organisational ones. As a result, they can be implemented, in order to minimise the impact of electromagnetic interference on the system functioning. This is a new approach to this issue, as there are currently designed and installed security systems at airports, but there is no analysis of the impact of electromagnetic interference on their functioning. In further research concerning this issue, the authors plan to further develop reliability-operational models, which will differentiate between the states of partial fitness. It will allow for more accurate mapping of the operation of the electronic safety systems which are applicable at airports.

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Piltyay, Stepan, Andrew Bulashenko, Hanna Kushnir, and Oleksandr Bulashenko. "Information Resources Economy in Satellite Systems based on New Microwave Polarizers with Tunable Posts." Path of Science 6, no. 11 (November 30, 2020): 5001–10. http://dx.doi.org/10.22178/pos.64-6.

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One of the fundamental problems of modern digital telecommunications is the economy of digital information and frequency resources, which are highly limited. The introduction of novel telecommunication systems and 5G networks requires searching for principal solutions for the economy and reusing the frequency spectrum. Therefore, modern wireless mobile, terrestrial, and satellite systems use various new technologies to increase communication channels' information capacity for the economy of limited frequency resources. One of the most effective ways to reuse the information system's operating frequency band is to apply antennas with polarisation signal processing. Such systems provide the possibility to transmit and to receive simultaneously signals with different types of polarisation. Consequently, the application of electromagnetic waves with two orthogonal polarisations improves wireless systems' information characteristics for various purposes. This allows doubling the information capacity of mobile, terrestrial, and satellite communication channels. Also, polarisation processing is carried out in meteorological and radar systems to receive, transmit, and process information. The essential elements of such systems are microwave polarisers and orthomode transducers. The electromagnetic characteristics of these devices affect the aspects of the whole system significantly. Main electromagnetic factors include phase, matching, and polarisation parameters. The article presents the development of a compact tunable polarizer based on a square waveguide with three posts. The developed polariser operates in the X-band from 8.0 GHz to 8.5 GHz. Created a mathematical model of the polariser is based on the scattering and transmission matrices. To verify the developed theoretical model's correctness, the calculation of all characteristics was also performed numerically using the finite integration technique. The developed compact polariser based on a square waveguide with three posts allows tuning it's matching and polarisation characteristics by changing all posts' heights. The developed polariser's main advantages are small dimensions, tuning options, and aspects of polarisation transformation.

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JUDSON, HARLOW M., GERALD R. ASCHOFF, and JOHN W. NEWCOMB. "AN ELECTROMAGNETIC ENVIRONMENT SYSTEMS ENGINEERING PROCESS." Naval Engineers Journal 99, no. 3 (May 1987): 218–26. http://dx.doi.org/10.1111/j.1559-3584.1987.tb02133.x.

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Schicho, Kurt, Michael Figl, Markus Donat, Wolfgang Birkfellner, Rudolf Seemann, Arne Wagner, Helmar Bergmann, and Rolf Ewers. "Stability of miniature electromagnetic tracking systems." Physics in Medicine and Biology 50, no. 9 (April 20, 2005): 2089–98. http://dx.doi.org/10.1088/0031-9155/50/9/011.

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Damiano, J. P., M. Scotto, and J. M. Ribero. "Computer-algebra systems and electromagnetic problems." IEEE Antennas and Propagation Magazine 38, no. 6 (1996): 92–98. http://dx.doi.org/10.1109/74.556526.

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MANIAK, Krzysztof. "Electromagnetic compatibility in distributed power systems." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 2 (February 5, 2018): 31–35. http://dx.doi.org/10.15199/48.2018.02.08.

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Khudak, Yu I. "Composite electromagnetic waves in magnetodielectric systems." Doklady Mathematics 93, no. 2 (March 2016): 227–30. http://dx.doi.org/10.1134/s1064562416020083.

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