Univerzitná knižnica - Vedecké odborné časopisy
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Item AEROjournal - celé číslo 2/2023(University of Žilina, 2023)Item Advancements in VDL and CPDLC: revolutionizing European aviation communication(University of Žilina, 2023) Novák, Andrej; Kováčiková, KristínaThe paper is focused on the transformative impact of VDL and CPDLC on aviation safety, efficiency, and reliability. Tracing the historical evolution from radio systems to the adoption of VDL and its integration within Europe's unified airspace initiatives, this paper deals with key theories including VDL Mode 2, ACARS, Aeronautical Telecommunication Network, ADS-B, and CPDLC. Emphasizing interdisciplinary collaboration to tackle communication challenges, the paper spotlights CPDLC's evolution integrating AI, Machine Learning, cybersecurity protocols, and technological integrations like 5G and satellites. Human-Computer Interaction research underscores user-friendly CPDLC interface designs. Methodologies encompass operational analyses, communication protocols, avionics technologies, and usability testing. Aligning with the Single European Sky initiative, the integration of VDL and CPDLC anticipates emerging trends while addressing challenges like interoperability, training complexities, and cybersecurity vulnerabilities through proposed solutions. The paper offers a comprehensive understanding of advancements shaping the modern aviation communication landscape.Item Traditional air carriers fare and booking class names as a part of their marketing strategy(University of Žilina, 2023) Sitarčík, Adam; Materna, Matúš; Šajbanová, KristínaThis paper focuses on the issue of fare and booking class names of traditional air carriers. Paper discusses the issues of traditional air carriers, history, development and current status, fleets, airline networks, services offered as well as mutual alliances. The article also focuses on the market analysis of the offered class names of the traditional air carriers divided by region. Paper includes an analysis of the data obtained in clear tables regarding preferred names of classes.Item Creation of a Z 43 aeroplane model for a flight simulator(University of Žilina, 2023) Poláček, Jozef; Škultéty, FilipThis paper describes the process of developing a Zlin Z 43 aircraft for a flight simulator. Work on an aircraft simulation consists of multiple parts. The development of the flight model is the first and core part of the simulation. Work on this part consisted of an analysis of the X-Plane blade element theory-based flight model, sourcing of the data this model requires, flight testing and further editing of the data to match the known performance of the Zlín Z43. The aircraft systems are another core part of the simulation. A Mix of the simulator's default, customised and fully custom systems are used. The theory and process of creating, animating, and texturing a 3D model are described, too. Visual quality can also be important, especially for its use in virtual reality. The last part is about the user interface, user experience and how the various use cases shape their design for an aircraft simulation.Item Long-range UAV hybrid petrol-electric powertrain(University of Žilina, 2023) Uhlár, Erik; Pecho, PavolAlong 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.Item Technológ - celé číslo 5/2023(University of Žilina, 2023)Item Identifikácia problémov s nerovnomerným rozložením teplôt v rámci batériového racku prostredníctvom CFD prístupu(University of Žilina, 2023) Csuka, Zoltán; Hlbočan, PeterThis article focuses on the issue of uneven temperature distribution within a battery rack, which significantly influences the performance and lifespan of second-life batteries. We analyze the contributing factors to this imbalance and propose optimized solutions. Numerical simulations are conducted under various operating conditions to identify key parameters affecting thermal uniformity. Based on the acquired data, we present strategies for effective temperature distribution within battery packs and racks, thereby enhancing the stability and reliability of the entire energy system. This study would have significant implications for the industrial deployment of battery technologies and their optimal utilization in high-performance energy systems.Item Návrh experimentálneho pracoviska pre testovanie a výskum činnosti batériového úložiska(University of Žilina, 2023) Kolková, Zuzana; Matušov, Jozef; Zubo, Augustín; Stupka, Aleš; Jandík, JanThe comprehensive experimental facility for battery storage introduces an innovative approach to analysing and optimizing the performance of energy storage systems. Designed with consideration for energy flow and overall capacity, it utilizes testing of key components such as batteries with a battery management system and power inverters. The facility, housed in two standard 20ft freight containers, not only enables efficient testing but also offers advantages in terms of cost-effectiveness, customization, mobility, and the possibility of parallel tests. The containers also serve as laboratory cells, providing an isolated environment for precise experiments. The division of the container into three main sections - power, control, and testing - brings a systematic approach to experiments with a focus on safety features. Implemented fire barriers and resilient windows ensure a secure environment for the development and testing of battery storage, contributing to the advancement of modern energy technologies.Item Analýza vplyvu konštrukčného riešenia batériového packu na chladenie batérií počas prevádzky(University of Žilina, 2023) Hlbočan, Peter; Csuka, ZoltánThe contribution is focused on the analysis of some possible approaches to the design of air cooling of the battery pack. The battery pack is equipped with a separate fan. As part of the analysis, the influence of the location of the fan in the pack and the direction of the cooling air flow on the cooling effect and the temperature field during operation were assessed. The result of the analysis is a specific recommendation for the location of the fan in the battery pack and the design of the air flow direction.Item Determination of the dynamic load of an improved hatch cover of an open wagon during operating modes(University of Žilina, 2023) Lovska, Alyona; Gerlici, Juraj; Dižo, Ján; Blatnický, Miroslav; Ishchuk, VadymThe article presents the results of determining the dynamic load of the improved cover of an open wagon under operational conditions. The peculiarity of the manhole cover is that the canvas is formed by the upper and lower sheets, between which, there is an energy-absorbing material with viscous properties. The dynamic load of the cover when a load of 150 kg falls on it was studied. It was determined, that the use of energy-absorbing material contributes to the reduction of the cover load by 21 % compared to a typical original design. The main indicators of the dynamics of an open wagon equipped with improved manhole covers are calculated. The results of the calculations showed that the studied dynamic indicators are within the permissible limits. The conducted studies will contribute to the reduction of damage to manhole covers during operation and the cost of maintaining one wagons.