University of Defense

Medicine of the, Serbia

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Medicine of the, Serbia
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Vitek R.,University of Defense
International Conference on Mathematical and Computational Methods in Science and Engineering - Proceedings | Year: 2010

This paper deals with the measurement of the mechanical construction kinematical characteristics using the digital image processing method. This method has been utilized to determine the angular velocity and the angular position of the stereoscopic rangefinder beam during its operation.


Zaplatilek K.,University of Defense | Leuchter J.,University of Defense
Radioengineering | Year: 2011

This article is focused on the original photovoltaic panel model identification method. The method is based on the measured characteristics i = f(v) for given irradiation. The system can automatically create a mathematical model for a particular panel and a specific temperature. Attention is paid to the approximation error progress, which is at minimum in the Maximum Power Points (MPP). During the application of well-known Shockley's equation to the entire panel the nonlinear and parametric power losses are corrected. This approach provides an accurate approximation with good agreement with measured data. The method can be applied to any measured photovoltaic panel. The model identification procedure and its use are demonstrated on the example of a particular panel. A detailed methodology for application is presented for users of the MATLAB environment.


Dycka P.,University of Defense
AIAA/IEEE Digital Avionics Systems Conference - Proceedings | Year: 2014

In civilian air traffic regulations, specifically L10 in the Czech Republic, there is no regulation concerning coherency, respectively phase stability, of ground signal carrier. In case that a ground beacon of DME system uses a coherent signal, it could be used to help to improve accuracy of the system or to add other parameters of aircraft flight measured by this system. We can think of more precise measurement of radial speed of the aircraft towards the beacon using Doppler frequency shift measurement or adding carrier phase measurements for improvement of accuracy of distance measurement. Some of these prepositions may also require improving other parameters of the signal from current regulations description. But these improvements are by itself in the best interest of the DME system and concerning some parameters of signals used by some other types of radio location or radio navigation systems. This paper is focused on measurement of coherency of impulses transmitted by ground beacon of DME using specifically created radio receiver with digital signal processing based on FPGA. The receiver is designed to synchronize on first impulse of randomly selected impulse pair and then to compare phase shift of next impulses with phase shift of the first one. The results of this operation are then stored to a memory for evaluation. The measurement is realized on signal transmitted by ground beacon LKTB by receiving and processing of the signal with the assumption that for correct evaluation of this specific parameter it is not necessary to distinguish between answers for the questions from actual aircrafts and random squitters, which, concerning the fact, that DME beacon transmits relatively constant number of impulse pairs per second, make it possible to measure this parameter without the need of a source of interrogation for the beacon. © 2014 IEEE.


Frantis P.,University of Defense
AIAA/IEEE Digital Avionics Systems Conference - Proceedings | Year: 2014

The article describes how can be modern approach in data processing applied to the Air Force data. There are many data sources in the Air Force that can be exploited and the data can be linked together to reveal valuable information. The article shows the big data approach to the data processing and how can big data help to understand various data and use it for safety increase. The sample system architecture and application are described in detail. The article presents possible usage scenarios for the described system. © 2014 IEEE.


Mazankova M.J.,University of Defense
ICMT 2015 - International Conference on Military Technologies 2015 | Year: 2015

The article deals with the blind spots of trucks, the mirror equipment of older and newer trucks and the risks of accidents due to the blind spots. An experiment was made with trucks Tatra T 810 V and Tatra T 815 with a goal to describe the visible spots and blind spots of the driver. The blind spots next to the right door of the vehicles and in front of the vehicles were measured. The results are important for understanding the danger of blind spots of trucks and for analysis of car accidents with trucks. © 2015 University of Defence.


Hubacek P.,University of Defense | Vesely J.,University of Defense
Proceedings International Radar Symposium | Year: 2015

This article is focused on the design of the short range FMCW (Frequency Modulated - Continuous Wave) Synthetic Aperture Radar (SAR) system, in particular, on the design of the transmitting part of this system where the signal generator is based on the direct synthesis via two stage frequency multiplication of DDS (Direct Digital Synthesis) device output. This solution is novel in comparison with commonly used signal generators of present SAR systems. First, the brief overview of several methods of SAR signal generation is presented as a background for following presentation of this new solution. Next, the block diagram of the SAR transmitting part, including proposed direct synthesized signal generator, is described more in detail. Finally, the several results of practical testing of the evaluation SAR system are shown. © 2015 German Institute of Navigation (DGON).


Vitek R.,University of Defense
ICMT 2015 - International Conference on Military Technologies 2015 | Year: 2015

This article deals with the evaluation of the effect of the small arms cartridge lubrication on the operation cycle of the automatic and the semi-automatic weapon. The course of the weapon's operation cycle has been measured using the digital high speed camera, utilizing the single-camera digital photogrammetry method. © 2015 University of Defence.


Frantis P.,University of Defense
AIAA/IEEE Digital Avionics Systems Conference - Proceedings | Year: 2014

□We created a special question language specific to the air force topic that can help the user to select the meaningful data from the search results. The future of the project would be to interconnect this system with an artificially intelligent computer system that is capable of answering questions posed in natural language such as Watson, or Deep Blue. © 2014 IEEE.


Frantis P.,University of Defense
AIAA/IEEE Digital Avionics Systems Conference - Proceedings | Year: 2012

The article describes the integration of a synthetic vision system into a pilot suit. The integration consists of designing the hardware part of the system-choosing the proper components and their placement into the pilot suit and helmet and modifications to the synthetic vision software. The integrated system can be used in the general aviation where it can work as a synthetic vision system with augmented reality function or in the military domain where it can also provide a ground navigation function to locate rescue points in case of ejecting from the airplane behind the enemy lines. The technical aspects of the first prototype design are discussed in the paper. © 2012 IEEE.


Hubacek P.,University of Defense | Vesely J.,University of Defense
Proceedings International Radar Symposium | Year: 2013

This article is focused on the design of the low cost, short range but fully functional synthetic aperture radar (SAR) system. First, the simulations of selected SAR algorithm are presented as a background for following determination of the main SAR system parameters. Next, the main SAR parameters and characteristics are derived for this selected SAR algorithm. Finally, the block diagram of such SAR is shown including a description of the main SAR elements parameters. The design of the block diagram of the real SAR system is the major contribution of this article. © 2013 German Inst of Navigation.

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