Práce a štúdie - Vydanie 09

Permanent URI for this collectionhttps://drepo.uniza.sk/handle/hdluniza/408

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Aerodynamic airfoils and their applications
(University of Zilina, 2021) Kamenická, Daniela; Bugaj, Martin
This work focuses on aerodynamic airfoils and their application. The significant aim of this work is to introduce and analyse different types of airfoils and their importance. The first part of the paper examines aerodynamic characteristics, airfoil geometry and brings the historical evolution of certain types of airfoils. The second part of the paper considers different databases, and closely examines the NACA database and its numerical labelling by looking at digit series label, which follows the acronym NACA, indicating the airfoil's shape. The main body of the paperillustrates the real-life application of chosen airfoils by examining horizontal and vertical stabilisers and wind turbines. The last part of the paperpresents the analysis of the application of chosen wing root and wingtip airfoils.
Aerodynamic profile drag
(University of Zilina, 2021) Sabo, Matej; Bugaj, Martin
Higher awareness of aviation sustainability and environmental impact creates more research on profile drag reduction. The basic principles of aerodynamic profile drag are described and its role within the total drag. The boundary layer is defined using mathematical and physical principles of fluid dynamics. There are two types of movement inside the boundary layer: laminar and turbulent. In these, their impact on profile drag is analysed. The profile drag of a wing has two sources: form drag and friction drag. Applications with the most impact, throughout history, on both types of drag reductions were reviewed. Because most of the total drag comes from friction, researchers focus more on it compared to form drag. The significant way of reducing friction drag is postponing the transition of laminar flow into turbulent. The control of laminar flow became crucial for reducing friction drag. In the last two decades, European Union supported multiple projects concerning laminar flow control. These advancements in the field are starting to get implemented and tested on new aircraft by manufactures.
The airspace of SR and its protection
(University of Zilina, 2021) Fábryová, Natália; Novák Sedláčková, Alena
The paper deals with international regulations of airspace of the Slovak republic and its protection. The paper is focused on the sovereignty airspace and free route airspace. The state has complete and absolute sovereignty over the airspace located above its territory. Airspace protection is important for ensuring territorial inviolability of the Slovak republic. There are defined the categories and classes of airspace. The last chapter consist of a NATO Integrated Air and Missile Defence System, its history and especially its function. In this chapter is defined the idea of „air policing “, which means the protection of airspace itself that is performed during the peace. In this part is described the position of emergency fighter pilots at Airport Sliac and model situations, but also the real situations, when Slovak emergency fighter pilots had to interfere against the aircraft that lost connection with air traffic management.
Analysis of implementation instrument approaches for hems heliports
(University of Zilina, 2021) Posluch, Samuel; Pecho, Pavol
In recent years, the trend of using a helicopters in the operation of the helicopter emergency medical service (HEMS) has been increasing. The reason is the wide range of uses of the helicopter, fast and safe transport of wounded people using new copters. Nevertheless, it is not possible to operate flights in poor weather conditions with a sufficient number of interventions. There is a need to develop new procedures for flying even under conditions other than VFR flight rules. The current state of helicopter technology in Slovakia allows it and therefore it is appropriate that new procedures using GNSS be created to establish a safe flight. The aim of the analysis is to evaluate the input factors available to the operator and to create a design approach based on the legislative requirements for the use of GNSS systems on the selected heliport. The resulting approach design can be used as one of the options for creating procedures. Such proposals could also be implemented on other operational bases, for the creation of a network of instrument approach or departure systems, which would create space for increasing the safety of helicopter emergency medical service in Slovakia.
Analysis of new progressive diagnistic methods in the area of aircraft maintenance
(University of Zilina, 2021) Supuka, Matej; Hrúz, Michal
In the area of aircraft maintenance, we commonly meet with the problem of corrosion, detection of which is one of the primary obstacles. Implementation of modern sensing techniques has a potential to bring many benefits. The objective of this work is to analyze technologies, their potential applications, and viability of switching to autonomous detection using computer aided sensing. Primary source of information were research articles from science databases such as ResearchGate and ScienceDirect. Available documents were analyzed and subsequently, useful information was extracted. First part deals with theretical knowledge about corrosion, based on which potential technologies were chosen. Those were then described, and their viability was analyzed, based on how well they could achieve our goals. Selected technologies have shown potential, however necessary solutions could not be found to enable fully switching tou autonomous computer detection. Although data acquired show many potential benefits that could arise from partial implementation of these technologies combined fith old fashioned visual inspection.
Anti-collision systems of unmanned aerial vehicles
(University of Zilina, 2021) Višnai, Kristián; Kandera, Branislav
The main goal of the paper is to summarize the knowledge about anti-collision systems of unmanned aerial vehicles. In the work are also described currenly used anti-collision systems of unmanned aerial vehicles. The work contains practical research in which we tested anti-collision systems of DJI Mavic 2 Pro. The purpose of the research was to find out how this unmanned aerial vehicle can avoid static obstacles. The second part of practical research is the analysis and comparison of systems that provide anti-collision actvity between unmanned aerial vehicle and aircraft in the vicinity. Part of the work is also the evaluation and selection of a cooperative anti-collision system for DJI Inspire 2. The conclusion of the papercontains a summary of the findings that we have obtained based on the analysis of available facts and using operational experience.
Calculation and simulation of the parachutist's movement from the jump from the aircraft to landing on the ground
(University of Zilina, 2021) Beník, Martin; Kováčik, Ľubomír
In this article, we focus on the movement of the parachutist from the jump from the plane to the impact on the ground. By creating a mathematical model based on Newton's second law, we create simulations, based on which we can determine whether the movement of a parachutist after jumping from a plane is a "free fall", or whether the action of forces and his position in the air affects the direction of his flight.
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
The coronacrisis and its impact on changes in civil aviation legislation
(University of Zilina, 2021) Verhaar, Robert; Novák Sedláčková, Alena
The paper deals with the analysis of the impact of the coronacrisis on civil aviation legislation. Its main goal is to analyse the impact of the coronacrisis and some of the measures taken to mitigate this impact on civil aviation. The paper consists of four chapters. The first chapter is focused on the analysis of the onset of the crisis in civil aviation caused by the spread of the COVID-19 disease and has also present the previous crises in the field of civil aviation, that had impact on civil aviation. In addition, this part of the article is focused on impacts of the coronacrisis on the condition of the civil aviation sector worldwide. The second chapter is devoted to some measures and methods proposed to mitigate the impacts of the coronacrisis on civil aviation and focuses and analyses some of the measures taken to mitigate the impact of the coronacrisis on the civil aviation. In the next chapter we describe the situation in the EU, subsequent legislation changes that were supposed to mitigate the situation as well as explaining the approach of individual EU member states to state aid towards air transport at present and the EU’s position on the issue. The fourth and last chapter describes the position of the Slovak Republic and the proposed solutions to the situation.
CPDLC, effects on increasing efficiency and safety in air traffic (system substitute for GA)
(University of Zilina, 2021) Pätoprstý, Matúš; Novák, Andrej
The paper focuses on the CPDLC. We aim to examine its effects on air traffic efficiency and safety, we also look through options of creating a substitute of the system for general aviation. CPDLC is datalink communication between controller and pilot, via text messages. Introduction is dedicated to principles of operating CPDLC system. In the next chapter we talk about the effects of the system on efficiency and safety of air traffic. We describe systems responsible for increasing efficiency and decreasing density of radio frequencies. We also examine effects on safety of air traffic and security of the system itself. Fifth chapter is an analysis of communication networks, suitable for creating a CPDLC substitute for general aviation. It encompasses dissection of different networks, which are essential when creating a new communication system. In the last chapter, we compare proposed options and evaluate their suitability for creation of a new communication system.
Creating study materials – bearings, shafts, springs and gears
(University of Zilina, 2021) Veselovský, Šimon; Janovec, Michal
The main goal of this article is to acquaint the reader with the topic of the author's bachelor's thesis. The article deals with the theoretical part of the creation of study material for bearings, shafts, spirngs and gears. its goal is to acquaint the reader with the toppic. The article introduces the mentioned machine parts, their more detailed description and practical examples of use in practice. Each chapter contains, in addition to the description, also graphic examples of the best possible use of the material in teaching. The aim is to create a comprehensive study material with practical examples in the Slovak language.
Design of lubrication system, design of motor bed, selecting of propeller for aircraft piston engine
(University of Zilina, 2021) Suk, Michal; Čerňan, Jozef
I will briefly address the three orientations of my paper in this scientific article. I will not go into details in the article. In the first part I will briefly describe the design procedure of a piston engine lubrication system, the requirements that a lubrication system should meet with respect to different types of piston engines and their focus, elements of the lubrication system and the properties of oils as lubricating fluids.In the next part I will describe the types and constructions of aircraft engine beds, technical requirements for aircraft engine beds and individual loads that the aircraft engine bed must withstand. In the last part I will focus on aircraft propellers. I will explain the basic principle of the propeller, the individual rules for selecting a propeller for a piston engine, safety requirements for an aircraft propeller and the dividing of basic types of aircraft propellers for aircraft piston engines.
Development of security measures at public international airports in relation to the history of threats against civil aviation
(University of Zilina, 2021) Pojedinec, Benjamín; Škvareková, Iveta
The security and safety of civil aviation at airports is important given the level of risks faced by civil aviation. It is a threat of terrorist attacks, smuggling or cyber attacks. We are trying to prevent all these threats and thus protect the health and safety of passengers. The paper deals with the issue of safety in civil aviation. The primary goal of paper is evaluation of the current situation at selected Slovak airports with regard to safety. The paper is divided into theoretical and practical part. The theoretical part is required to present a theoretical view of basic concepts in aviation history air strikes, present and future conservation and the impact of human factors on the safety of air transport. The essence of the practical part is the evaluation of the current situation in selected Slovak airports and the implementation of a qualitative survey with the help of a questionnaire. Based on the analysis and the results of the questionnaire survey, suggestions are provided to improve safety at selected airports.
Disassembly, inspection, repair and assembly techniques
(University of Zilina, 2021) Littva, Matúš; Janovec, Michal
The aim of this article is to present the current techniques of disassembly, control, repair, and assembly of aircraft components. It reproduces proven but also modern procedures used in aviation practice. The article is divided into several consecutive parts. The first part is a preface which is a kind of introduction to the issues. The following section is an analysis of available sources of information about maintenance of aircraft components. The third part is the content core, in which we describe the basic techniques of aircraft maintenance. Mentioned part containsinformation about the inspection techniques, corrosion treatment procedures, repairs of structural components and typical non-destructive tests. In the last part, we derive the conclusions and emphasize the importance of the described maintenance procedures in the future. We have included several illustrations in the article for better understanding.
Flying in wave conditions, priciple of lfying in wave, history and dangers
(University of Zilina, 2021) Bajana, Ivan; Jarošová, Miriam
Flying in wave is becoming increasingly popular for pilots of gliders and sport engine airplanes. The growing trend of flying inwave conditions can be seen not only in Slovakia but almost all over the world The reason for the increase in the number of the high-altitude flights in the wave is their great potential, which has been demostrated several times in the record books. On the cotrary, for navigation and training flights, the occurence of wave current is unsuitable. It brings with it great risks and dangers that have ended tragically many times in history. For this reason, there is a long and extesive meteorological preparation behind the wave flights. The aim of wave conditions research is to provide information on how to predict wave flow, under what conditions and with at least what equipment it is possible to fly sadely in wave current and what pitfalls and risks wave wave brings with it. The result is a range of information that can be used not only for flights into the wave but also for normal navigation or training flights.
Funding options of regional airports in the context of present legislation
(University of Zilina, 2021) Vyskoč, Lukáš; Remencová, Tatiana
The presented article is focused on funding options of regional airports. It describes the provision of state aid to regional airports, and it defines the regional airport, its specifications, and problems. From the view of the present legislation, it evaluates the European Union legislation and its application, it also analyses the state aid provision in civil aviation. In the context of the ongoing Covid-19 pandemic, it describes the situation in air transport and solves the provision of state aid to regional airports in Slovak Republic. Based on acquired knowledge and information, it suggests the changes in the legislation, and it brings a new vision how to improve the situation of regional airports not only in Slovak Republic, but also in the world.
Ignition systems of combustion piston engine and possibility of its optimization
(University of Zilina, 2021) Vorlíček, Marek; Čerňan, Jozef
This paper explains the basic definition of ignition, combustion and description of the ignition system functionality. The ignition systems are divided according to established criteriums into the most used types and descriptions of each ignition system components. It focuses on ignition timing and circumstances that affect it and how they influence the observed parameters. I am using ignition timing as an instrument for the observation and optimization of ignition. These practices are tested on piston engine in the practical part of this paper. It describes the modification of the timing curve, measuring of engine power and comparison between each curve. It is an analysis of engine performance under different conditions. The most efficient timing curve is chosen and further evaluated. The used engine for this paper was a rebuild from a car engine used in Trabant 601, VEB Automobilwerke automobile.
Implementation of a new RWY reporting system and snowtam format in slovak republic
(University of Zilina, 2021) Drábek, Marek; Kazda, Antonín
This paper presents the upcoming changes in the runway reporting format and the newly introduced SNOWTAM format. The aim of the paper is to draw comparisons between the current SNOWTAM format and the updated version applicable as of November 2021. The author analysed information from available documents published by the International Civil Aviation Organisation ICAO, which describe the general conditions adopted to the new runway condition reports formulations. Since the author is enrolled in his pilot training, his objective when writing this final thesis, was to understand the issue of the changes. From this knowledge he can benefit in his future carrier. The paper points out new formats of reports of airport movement areas reporting conditions. As the new reports and techniques of reporting have not been used in real conditions yet, the author based the paper on the ICAO standards and recommended practices, ICAO and EASA guidance material. Introduction of the new methodology is expected to provide a better understanding of reports informing about contamination on movement areas, to ensure more precise aeroplane performance calculations and enhance the safety.
Increasing the safety of operation of unmanned aerial vehicles in adverse meteorological conditions
(University of Zilina, 2021) Psárska, Vanesa Viktória; Ažaltovič, Viliam
Primary obstacle in using unmanned aerial vehicles are adverse meteorological conditions. To allow more usage options in day-to-day life, it is neccesary to increase safety in such conditions. The topic of this paper is analysing possible solutions. First part discusses the current state of art and describes systems currently used. It defined meteorological conditions such as low temperature, wind, humidity and low visibility. It describes their influence on usage of remote controlled aircraft and change in their flight characteristics. Next part is devoted to analysing possible solutions and their applicability. The objective was to find out how to increase safety during adverse meteorological conditions and which technologies are best for achieving this result. Selected technologies have shown great potential and options for increasing safety are plentyfull.
International regulation of air freight
(University of Zilina, 2021) Sitarčík, Adam; Novák Sedláčková, Alena
This article is focused on the issue of air freight, its development, importance and current status. The article defines general knowledge in the field of civil cargo air transport as history, current global events, current measures due to the pandemic of the spread of Covid-19 and the division of airlines according to business models. It also includes the periodic development of legislation in the field of air transport freight, global and European legislation, as well as air alliances and organizations in civil aviation. The article deals with contracts in the field of air freight transport such as transport contract and agent contract. Conclusion is focused on the importance of the today's study materials in the field of air freight and also declared that this article and the bachelor thesis could stands out as a supplementary material for the professional public, which will enable them to deepen their knowledge in the field of air freight.