Area Of Electromagnetic Compatibility Research Articles

Development of accelerated methods for calculating the pattern of current spreading over the surface of spacecraft

High-energy charged plasma particles pose a danger to space technology. The accumulation of charged particles on the body of the spacecraft generates discharges. Electrostatic discharge is a source of powerful electromagnetic interference that adversely affects the functioning of individual parts and entire systems. According to statistics, in about 30% of cases, the loss of satellites is the consequence of discharges. Before the operation of spacecraft, it is necessary to calculate the spreading of currents, which requires large machine and time costs. The article proposes original approaches for quickly constructing a picture of the spreading of currents over the surface of a spacecraft due to electrification. The key point of the first approach is the construction of a limited area for calculating the flow spreading. The calculation of transient currents will only take place in the electromagnetic compatibility area specified by the user without affecting the rest of it. The paper also developed new simplified computational schemes for a system of differential equations based on the Euler methods. With the help of new computational schemes, the time for calculating unknown quantities in a local area specified by the user has been reduced by several orders of magnitude compared to the calculation of unknown full models. The article presents conclusions on new computational schemes, indicating the complexity of their construction. The adequacy and accuracy of the new computational scheme are confirmed by a practical example.

EMC challenges for the era of massive Internet of Things

The technical development towards the full vision of the Internet of Things (IoT) is expected to reach its full potential by the coming 5G wireless technologies. This will open up for so called massive IoT characterized by very large co-location densities. This development will affect the area of Electromagnetic Compatibility (EMC) in a number of ways and may even be the most challenging issue for the EMC area since it was born for over 100 years ago. The challenges that emerge as a result of the mass increase of wirelessly consumer devices, dense co-located, working in new frequency bands and in scenarios characterized by being highly dynamic, flexible and non-predictable, will be complex and will require new EMC equipment, theoretical models and methodologies for EMC analysis and testing to be developed. In this paper, some of these new challenges are highlighted and discussed. Furthermore, numerical results from some dense co-location scenarios are presented to show examples of interference challenges to be handled.

Ensuring Electromagnetic Compatibility On Newly Built Vessels for the Polish Navy

Abstract The need to confirm compliance with the requirements of the Polish Defence Standards, STANAGs and shipping classification societies documents poses new challenges for manufacturers and suppliers of ship’s equipment and systems. This is related to the continuous technical evolution of electronic and electrotechnical devices, especially in the field of wireless transmission and data exchange. These challenges also apply to research laboratories, which must keep up with both the technological changes of the examined objects and the updating of requirements and reference documents. It is connected with the necessity of constant development in the area of technical facilities and competences. This paper presents an overview of the currently binding requirements for devices and systems for newly built vessels, with particular regard on the area of electromagnetic compatibility. It indicates the planned trends of changes of these requirements in relation to the technical evolution of devices. Discussion with several examples of problems and challenges faced by both equipment suppliers and research laboratories engineers were presented.

AN ANTHOLOGY OF THE DISTINGUISHED ACHIEVEMENTS IN SCIENCE AND TECHNIQUE. PART 33: ELECTROMAGNETIC COMPATIBILITY AND PROTECTION FROM ACTION OF POWERFUL ELECTROMAGNETIC INTERFERENCE OF RADIOELECTRONIC, ELECTRICAL ENGINEERING AND ELECTRIC POWER EQUIPMENT

Purpose. Implementation of brief analytical review of basic scientific and technical achievements in area of electromagnetic compatibility (EMC) and protection from destabilizing and striking action of powerful electromagnetic interference (PEMI) of natural and artificial origin of radioelectronic, electrical engineering and electric power equipment. Methodology. Scientific methods of collection, analysis and analytical treatment of scientific and technical information in a sphere EMC and such areas of knowledge’s as radioelectronics, electrical engineering and electric power engineering. Results. A brief scientific and technical review is resulted modern positions problems EMC and protection of equipment from action on them PEMI. It is shown that PEMI can result in failures in-process and death of examined equipment. Annual harm in the industrially developed countries of the world from the striking affecting of PEMI modern equipment with integral microcircuits and semiconductor devices can make ten of milliards of USD. The basic methods of protection of equipment are resulted from PEMI and protective devices (PD), intended for the increase of effectiveness of modern equipment to the action of external PEMI. Principles of work of the resulted PD and their basic technical descriptions are described. Originality. On the basis of materials of scientific monographs, journal publications, normative documents and internet-reports systematization of basic PD, in-use presently in an area EMC and protection of different equipment from the hazard agency of external PEMI is executed. Practical value. Popularization of scientific and technical knowledge’s in an area EMC and protection of modern equipment from a dangerous action on them PEMI. Formulation of important for society scientific and technical problems and tasks, arising up in an area EMC and providing of the reliable functioning of modern equipment in power electromagnetic interference.

Far field from near field measurements. An approach to solve the inverse problem of electromagnetic radiation via genetic algorithms

In this paper the application of the Genetic Algorithms (GA) as a search method of a geometric configuration of elementary dipoles that solve the inverse problem of electromagnetic radiation are reported. The inverse problem of electromagnetic radiation appears as a new application in the electromagnetic compatibility area that allows estimating the far field radiation from near field measurements.

Compromising Radiated Emission from a Power Line Communication Cable

This contribution presents a preliminary investigation on the possibility of eavesdropping, i.e., of extracting information by exploiting the electromagnetic field radiated in the vicinity of a power line communication (PLC) network. This kind of problem is usually known in the electromagnetic compatibility area under the codename TEMPEST. Electromagnetic field measurements were carried out in a laboratory environment, both inside and outside a building, and the main statistical characteristics of the compromising channel are presented. A software tool simulating a PLC communication has been developed and used to draw apreliminary conclusion on whether the radiated emissions can be exploited or not.

Charge relaxation across conducting films

A brief analysis of the charge relaxation mechanism across a nonmagnetic metallic film was outlined. In the relatively recent past the classical relaxation time estimates for a bulk conductor were reexamined and found wanting; although for semiconductors the classical approach is still sometimes resorted to for a rough working estimate, we adopted in the present communication a somewhat different, quasi-heuristic study, explicitly taking into account the distributed parameter characteristics of the film. The solution of the proposed problem also provides insight into the transient behavior of nonmagnetic shielding plates-insight which might be of practical value in the area of electromagnetic compatibility.

Genetic Algorithms and the Inverse Problem of Electromagnetic Radiation

From experimental measurements of near field of any radiant device (RD) and using genetic algorithms (GA) as optimization tool for finding out the parameters of a model, carry out the search of geometric dipole structure (not necessarily unique), in order to reproduce the measurements above mentioned, with that model the far field is predicted. With any of the configurations (parameterized model) is possible to estimate the radiation in the zone of far field only modifying the distance parameter in the model. In this paper the application of the GA as a search method of a geometric configuration of elementary dipoles that solve the inverse problem of electromagnetic radiation are reported. The inverse problem of electromagnetic radiation appears as a new application in the electromagnetic compatibility area that allows estimating the far field radiation from near field measurements.Key Words: Electromagnetic Radiation; Geometric dipole structureDOI: http://dx.doi.org/10.3126/jie.v8i1-2.5115Journal of the Institute of Engineering Vol. 8, No. 1&2, 2010/2011Page: 231-236Uploaded Date: 20 July, 2011