Žilinská univerzita v Žiline

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    Konštrukčná optimalizácia anténnych systémov UAS
    (University of Žilina, 2024) Bernátová, Barbora; Pecho, Pavol
    In this scientific article, we will focus on the impact of various material on radio signal attenuation. In the theoretical part, we will take a closer look at the history of unmanned aerial systems, basic types of unmanned aerial vehicles and their practical usage. Furthermore, this paper describes the advantages of using the UAV for calibration the ILS and describes how electromagnetic signal transmission works. In preparation for the practical part, the article explains frequency bands and antennas, used in UAV communication. In the experimental part, the properties of individual materials and their impact on the performance of the radio modules are analysed. The outcome of the work is an analysis of signal attenuation measurements at three different frequencies. The measurement results showed that the greatest signal attenuation in each case was caused by the carbon due its conductivity. In terms of strength and permeability, we found that the PET-G cover increased the signal strength compared to the measurements without the cover. This analysis may helps in the design of covers for antenna systems and the UAV construction that ILS will calibrate in the UHF frequency band.
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    Comparison of pilot's workload during NDB and ILS approaches
    (University of Zilina, 2021) Fedáš, Július; Škvareková, Iveta
    The paper is focused on the comparison of workloads of pilots during the precision ILS (Instrument Landing System) approach and non- precision NDB (Non-Directional Beacon) approach. For the needs of our work, we used technology to measure heart rate variability, which was used to collect the authoritative data needed to analyze the workload and stress levels of the tested participants. Our study involved four pilots, who were divided into two groups, a group of beginner pilots and advanced pilots. Practical measurements were performed on the flight simulator L410 UVP-E20, which is located in the premises of the Flight training and education center of the University of Žilina. The aim of our work was to find out and compare to what extent the workload during NDB and ILS approach of pilots with different levels of practical and theoretical experience will be different and also to compare these two approach systems with each other. We chose the final phase of the flight, due to its complexity and overall demands on piloting, which in this case has been the precision approach and non- precision approach. Practical measurement and analysis of the obtained data showed that the tested pilots indicated significant differences in the level of workload, resulting from their experience.. We also noticed a slight difference after comparing the two approaches. The conclusion of our work contains a summary of the measured results, as well as the perspective of the contribution of measuring the workload to the future and its use in a wider range