Univerzitná knižnica - Vedecké odborné časopisy

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    Long-range UAV hybrid petrol-electric powertrain
    (University of Žilina, 2023) Uhlár, Erik; Pecho, Pavol
    Along with increasing UAV both weight load and endurance requirements, there is a need to use alternative propulsion solutions, to satisfy the market as well as various customer applications. Although lithium polymer cells are yet well developed, they are still too heavy for long-endurance UAV missions. Hybrid petrol-electric powertrains are outstanding imitations of hybrid hydrogen-electric propulsion systems, which are currently under intensive development. Not only for their onboard power production and improved overall efficiency but also for simulating a weight load of a future hydrogen-electric system. Therefore, such a system is being tested and aimed to be used in fixed-wing UAVs for long-endurance missions. This paper describes the design and operation of a hybrid petrol-electric propulsion system and further operational optimization based on comprehensive ground testing.
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    Detekcia rušenia signálu GNSS na letiskách
    (University of Žilina, 2023) Velčický, Ján; Novák, Andrej
    Although the Global Navigation Satellite System provides an increased precision in instrument approaches, it is vulnerable to various signal interferences causing either decreased position accuracy or a complete loss of GNSS signal reception. One of the major threats to a GNSS receiver is the intentional interference known as jamming. Incoming airplanes can be seriously endangered by such signal loss. This bachelor’s thesis addresses the detection and classification of possible unintentional and intentional interference and spoofing attacks on airplanes in proximity to the airdrome Žilina. Besides that, other systems which show sufficient reliability are compared. Additionally, critical parts of RNP approach chart map are evaluated. Finally, a device called HackRF ONE is selected to be put in aerodrome proximity for detection of possible GNSS interference. Using this software defined radio as unmanned aerial vehicle alarm and protection system is another suggested possibility.
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    Výcvik pilotov bezpilotných prostriedkov
    (University of Zilina, 2022) Kováčiková, Kristína; Kandera, Branislav; Kováčiková, Martina
    Unmanned aerial vehicles are a part of a fast-growing aviation sector that has the potential to create new jobs as well as economic growth in the individual countries of the European Union. Unmanned aerial vehicle is a relatively new concept compared to the aircraft and it is possible to still find shortcomings in pilot training. The aim of the scientific paper is to map the current state of pilot training regarding unmanned aerial vehicles and to determine the level of demand for the implementation of an unmanned aerial vehicle flight simulator in the flight training of pilots of unmanned aerial vehicles at the Department of Air Transport at the University of Žilina.
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    Rozbor bezpečnosti letov UAV a konspekt aktuálnych legislatívnych požiadaviek
    (University of Žilina, 2021) Škultéty, Filip; Kandera, Branislav; Janovec, Michal
    Despite the recent legislation, which has been formed in the last five years to its current form, the safety for the UAV operation is borne by the pilot, as he/she is the one who is responsible for the direction of UAV movement thus for any collision. For this reason, it is necessary to increase the safety of UAV operations outside the duties and competencies of the pilot at a distance, for example, through anti-collision systems and air traffic management systems. This article was initially focused on analysing aviation events in Slovakia associated with the operation of the UAV. Another factor that significantly affects the operation of UAVs to a large extent is the legislation itself. A special part was devoted to the legislation in terms of airspace determination, procedures and rules of operation of the UAV. From a legislative point of view, it is currently an important aspect to define the correct and reasonable level between the restrictions in order to increase the safety of operation only on an indispensable scale, not to be very restrictive to operators.
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    NÁVRH METODIKY VÝCVIKU A UDRŽATEĽNOSTI SCHOPNOSTÍ PILOTÁŽE BEZPILOTNÝCH LIETAJÚCICH PROSTRIEDKOV
    (Žilinská univerzita v Žiline, 2020) Ažaltovič, Viliam; Škvareková, Iveta; Kandera, Branislav
    While the density of UAVs operations grow in the airspace the demands on their safe operation are increasing. Nowadays, the risk of an unmanned aerial vehicle colliding with an aircraft with another unmanned aerial vehicle or object is high as ever before. It is this ever-increasing danger that is the reason for training remote pilots, who will be able to safely control unmanned aerial vehicles. The goal of this article is to propose a pilot training methodology for the multicopter configuration of UAV. In the future, the proposed methodology may contribute to the development of rules for the training of remote pilots. The proposed methodology can be used in the future as a guide for the safe operation of unmanned aerial vehicles for the general public.