
Mirosław WołoszynGdansk University of Technology
Mirosław Wołoszyn
About
36
Publications
5,817
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
98
Citations
Publications
Publications (36)
In the paper the results of research on the flux compression generator (FCG) parameters influence on its generation factor have been presented. During the operation of the
FCG, its inductance and resistance decrease as a result of the winding being short-circuitedby the expanding armature. As a result, the primary current supplying the generator is...
The problem of modeling fuse systems with high dynamics of current switching is an issue widely described in the literature. Such systems can be used in particular to form high voltage pulses with values of hundreds of kV characterised by the duration of a fraction of μs. This paper presents an empirical model of a multi-wire fuse opening switch, e...
In the literature, the emission properties of the electromagnetic field pulse systems
based on high voltage antennas (HVR) have been widely described. In order to increase
the emission efficiency by extending duration and increasing amplitude of the impulse it
is possible to use a resonance system tuned to the parameters of the signal shaped in the...
Computer simulation results of the flux compression generator (FCG) loaded with an inductor has been presented in this paper. Simulation research has been performed in order to optimize the load parameters of the selected model of FCG coil. The influence of the load inductance and resistance on the current gain factor and the load accumulated magne...
Computer simulation results of the flux compression generator (FCG) loaded with an inductor has been presented in this paper. Simulation research has been performed in order to select the parameters of FCG load coil properly. The influence of the load inductance and resistance on the current gain factor and the magnetic field energy accumulated in...
In the literature, the emission properties of the electromagnetic field pulse systems based on high voltage antennas (HVR) have been widely described. In order to increase the emission efficiency by extending duration and increasing amplitude of the impulse it is possible to use a resonance system tuned to the parameters of the signal shaped in the...
The article presents a new electromechanical model of inductive-dynamic drive. The model is implemented in two environments: Maxwell for analyzing electrodynamic phenomena including moving of the disc and Ansys which allows for stress analysis on the basis of the volume forces imported from Maxwell. Additionally, a model validation by comparing wit...
This paper presents a magnetometric system with scalar sensors mounted on two independent platforms, which is used to detect sunken shipwrecks. Increasing the distance between the sensors allows for more precise measurement of the difference in the magnetic induction module than in the case of sensors mounted e.g. on the aeroplane's wings. This typ...
Electrodynamic actuators are used in hybrid switching systems where a very quick contact separation as well as operation repeatability and long-term reliability are required. The article presents selected results of thermal studies in the electrodynamic drive system. Study was carried out on the basis of the 3D electromagneto-thermal model implemen...
Purpose
The purpose of this paper is to present computer simulations of ship’s magnetic signatures using a new thin plate boundary condition implemented in the Opera 3D 18R2 programme. This paper aims to check the magnetic signatures’ numerical calculations precision of objects using the thin plate boundary conditions and analysis of the magnetic...
This paper presents the results of a computer simulation of coaxial magnetocumulative current generators (MCGs). The simulation tests were carried out for different values of the internal diameter, length and speed of the deformation of the MGP element.
Construction of emitters radiating the energy of the electromagnetic field from the systems that generate short duration current impulses (in the order of ns or μs) and large peak value (in the order of MA) has been subject of scientific papers for many years. Emitters of such kind are called Large Current Radiators (LCR). The structure of LCR emit...
The results of numerical simulations of the magnetic field surrounding of land vehicles' models have been presented in this paper. Vehicle containing of ferromagnetic elements distorts the Earth's magnetic field. This distortion can be measured by magnetometers. It is possible to detect and identify an object on the basis of its magnetic signature.
Purpose
– The purpose of this paper is to present two methods of detection for landmines with minimal metal content.
Design/methodology/approach
– First, two methods of landmine detection are presented: magnetic and infrared with microwave heating. For each method the numerical algorithm of an object’s position and properties determination are pre...
This paper presents the concept of determining the optimum frequency of coil supply in inductive-dynamic drive. As a criterion to obtain the sought frequency, the smallest value of reduced stress in the disc was assumed while maintaining the desired dynamics. The disc stress is determined on the basis of solution of vibrating thin plate equation. M...
This paper presents the proposal of the hybrid circumferential-field model of an electrodynamic actuator. The field model uses the inductor current as the input data which is obtained from the circumferential model or experimentally. The field model implemented using the FLUX program makes it possible to easily determine the pressure distribution a...
The paper presents a mobile system for the detection of ferromagnetic objects. Each ferromagnetic object disturbs the uniformity of the magnetic field of the Earth. This disturbation can be measured with precision magnetometers. In the present mobile system uses an optically pumped magnetometers operating in the differential system. This paper desc...
The magnetometric method is used among other things on mobile platforms (planes, helicopters) in military systems and in geological research. Optically-pumped and SQUID magnetometers are used in magnetic systems on airplanes. To be able to attain the sensitivity of modern magnetometers in flight, it is important that maneuver-related magnetic inter...
The new non-iterative method of determining the dipole moment and location is presented in this paper. The algorithm of an object's localization and identification was achieved by using numerical calculations and approximation method. The arbitrary shapes of an object were assumed in the identification algorithm - axially symmetric spheroid (a prol...
The work describes the sensor subsystem for the magnetic signals of vehicles based on measuring the magnetic flux density as well as denoising unit. For this purpose a set of wireless magnetic sensors is used that allows to monitor the movement of vehicles at airports, seaports and border check-points. The measured signalls serve for detection and...
Ferromagnetic objects have induced and permanent magnetisation. The permanent magnetisation in case of warships has to be decreased by a degaussing process for minimization of the magnetic field of a ship. The degaussing process is a complicated and time-consuming task. The cheapest method of investigation of degaussing process is research on ship...
A measurement system for investigations of the magnetic field of a ship model is presented in the study. The system will be applied in order to work out algorithms for degaussing process of warships. A method of magnetic disturbances compensation occurring in the environment is discussed.
Results of the analytical and numerical analysis of the degaussing process phenomena of ferromagnetic objects were presented in this paper. The screening effectiveness of the electromagnetic field of magnetic screens in most cases depends on thickness, conductivity sigma, magnetic permeability mu of the screen and angular frequency omega of degauss...
The paper presents a circuital model of arc in a circuit breaker. The model is intended to be used in simulations of the electric circuits transients. It was implemented in the ATP simulation program. The article presents also a few simulation examples of simple DC and AC circuit containing described arc model. The results show good compatibility w...
Results of the numerical analysis of the magnetic disturbances of a plane caused by eddy currents induced in conducting elements of the plane were presented in this paper. Magnetic disturbances of the object's model were carried out in Opera 3D. Computer simulation of the magnetic disturbances allows to check Leliak model of these disturbances. Com...
The results of the numerical analysis of the distribution of the magnetic field inside the finite thin-walled ferromagnetic pipe were presented in this paper. The analysis for different values of the thickness walls, relative magnetic permeability and electric conductivity of the pipe was carried out. Tne analysis of the magnetic field was performe...
Detection of ferromagnetic objects in local magnetic anomaly of the Baltic Sea
In geological researches several kinds of methods are applied to discovering the natural resources. Planes, helicopters and UAVs (UnmAnned Vehicle) are used in researches in large areas. The gravity, electromagnetic and magnetic methods, which are used in geological rese...
The magnetic field inside the vessel during the degaussing process may be harmful to electronic devices. The degaussing process is crucial for the minimization of the permanent magnetization of the vessel. The results of the analysis of the magnetic field inside the vessel during the degaussing process are presented in this paper. The analysis of t...
Magnetometric systems are used especially in geology, archeology and military devices. The very sensitive magnetometers as SQUID, optically pumped, Overhauser's, proton and fluxgate are used in measuring the Earth magnetic field. The magnetometric method and modem magnetometric systems are presented in this paper.
The ultra fast hybrid circuit breaker is comprised of the electrodynamic drive (EDD), mechanical contact system (CB), solid-state switch (SS), over-voltage limiter (VR), and short-circuit detection and control unit (SDCU). An overview is given on the voltage changes observed at the contact system during its opening, and changes of current within th...