Žilinská univerzita v Žiline

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Author: search.filters.author.Pecho, PavolEnd date: 2021

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    Prototyp simulátora letového environmentálneho laboratória Evirolab
    (University of Žilina, 2021) Janovec, Michal; Materna, Matúš; Pecho, Pavol; Kandera, Branislav; Radosa, Filip
    The aim of this paper is to create a solid structural platform for the placement of computer equipment and other computer accessories to create a flight simulator from scratch. The simulator will be designed to help pilots in training get accustomed to basic flight procedures and the behavior of aircraft control surfaces during flight. Practical part deals with the design of a simulator inspired by the airplane Zlín Z 242 L, the selection of suitable material and technology to produce this simulator and the measurement of most important dimensions required for the making process. Obtained dimensions will be used to model the structure in a three-dimensional plane with the help of computer aided software, in order to create blueprints of our simulator structure. Said blueprints will be later used to cut building materials to required length and to assemble the construction frame. Last pages are dedicated to seating all required computer software directly on the frame in the correct manner.
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    System for early identification of local atmospheric changes in flight
    (University of Zilina, 2021) Dvorský, Richard; Pecho, Pavol
    Paper “System for early identification of local atmospheric changes in flight” is aimed at creating a model of a new variant of instrumentation of non-powered aircraft by monitoring air parameters such as air temperature, static pressure and air humidity. We will use modern technologies to create this theis. This created device will work in the search for thermal currents. After next research as a tool in powered aircraft where it will function as a system for identifying local atmospheric changes that are dangerous for flight itself. Another possible use will be in transport aircraft to predict turbulence
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    Experimental state of tensile testing of aircraft reciprocating internal combustion engine
    (University of Zilina, 2021) Mrva, Matúš; Pecho, Pavol
    The main goal of the Paper "Experimental state of tensile tests of aircraft piston internal combustion engine" is to create an experimental and fully functional measuring stand for monitoring the parameters of a model internal combustion piston engine, using different types of propellers. The partial goals are the creation of a teaching aid, the construction of a unique facility and the creation of opportunities for research and development in this area by other students. Using a measuring device, it was possible to record the various operating characteristics of the internal combustion engine. Based on this, the usability of individual propellers for the measured internal combustion engine can be determined.
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    Design and construction of a UAV device with a fixed wing for the conditions of rescue services
    (University of Zilina, 2021) Petrík, Nikolas Michael; Pecho, Pavol
    The paper is focused on comprehensive design of an unmanned aerial vehicle with fixed wing, which would add efficiency to specific activities performed by rescue services. The current rapid development of unmanned aerial vehicles is slowly becoming part of many industries around the world. The aim of this paper is to design an unmanned aerial vehicle that could provide safe, reliable, and efficient operation. The overall design, construction, and installation of the proposed unmanned aerial vehicle should integrate several modern technologies. To make an ideal design of unmanned aerial vehicle it is required to possess the knowledge of current construction methods of additive manufacturing, understanding of legislation in operating conditions and, in addition to general knowledge of unmanned vehicles, also comprehensive skills in programming and configuration of autonomous control elements of autonomous unmanned systems. After the production of the unmanned aerial vehicle with fixed wing, very good technical properties were demonstrated during experimental ground tests. Achieved technical properties are comparable to those owned by the unmanned aerial vehicles that are currently on the market. The final design configuration using an infrared-sensitive optical device could perform activities such as: searching for missing persons in hard-to-reach and vast terrain or searching for forest fires.
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    Construction of a reactive engine intended for measurement of thrust characteristics and efficiency of selected aviation fuels
    (University of Zilina, 2021) Sitár, Matej; Pecho, Pavol
    The content of the research consists in the approach and interpretation of pulsejet engines as simple devices that are able to produce thrust. Relevant information about the principle of operation, the process of manufacturing a pulse engine, together with knowledge about fuels, which are subjected to research focused on the production of thrust, provide the design of a functional valveless pulsejet engine type "Lockwood". The pulsejet engine is designed to measure the thrust characteristics and efficiencies of selected aviation fuels, and its construction is the main goal, which also provides insight into a comprehensive solution to the problem. Experiments focused on fuel research, have become the main motivation for our work, which in addition to theoretical knowledge also captures the factual solution to the problem in its practical part. Thework describes a specific procedure for the construction of a pulsejet engine, but also a description of by-products of this process, in the form of a metal stationary base and the implementation of various functional components into the structure. The results of the experiments represent important outputs of the work, which clarify the values of thrust, which the engine produced when propelled by selected fuels and at the same time provide inspiration for the implementation of other similar research.
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    Assessment of aircraft coating resistance to lighting strikes
    (University of Zilina, 2021) Sudin, Matúš; Pecho, Pavol
    The paper evaluates the damage caused by lightning strikes on various types of aircraft coatings, the extent of the damage and the evaluation of technical and economic factors. The aim of the work is to evaluate and compare the damage after lightning strikes on metallic and non-metallic coatings of aircraft and to find out which coatings are more advantageous from a technical and economic point of view for use in practice. In the introductory part, the work describes the current state, the coating of aircraft, their function and application and the phenomenon when the aircraft is struck by lightning. Subsequently, the work deals with selected coatings and briefly describes them. The main part describes all parts of the performed experiment, samples and technical equipment used for the experiment and compares the damage on selected types of coatings. The last part of the work deals with the evaluation of results, based on which it evaluates the technical and economic advantages anddisadvantages.
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    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.
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    Design procedure and honeycomb screen implementation to the air transtport department’s subsonic wind tunnel
    (University of Zilina, 2020) Hrúz, Michal; Pecho, Pavol; Bugaj, Martin
    Wind tunnels are the most widely used tools when comes to validation of Reynold number. Most of wind tunnels use various air straighteners or flow conditioners to achieve as most unified air flow as it’s possible. This article deals with design and creation procedure of air flow straightener – honeycomb screen. Based on mathematical relations and empirical experience defines dimensions and characteristics for subsonic wind tunnel of the Air Transport Department of University of Žilina. Wind tunnel equipped with a suitable screen provides more relevant and accurate data, which are crucial for final validation of results of test objects.
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    Study of reinforcement design h-profile of aircraft wing spar
    (University of Zilina, 2020) Pecho, Pavol; Magdolenová, Paulína; Hrúz, Michal; Kováčik, Pavel; Škvareková, Iveta
    In today's world, with ever-increasing safety requirements, there is a growing demand to maintain or reduce production costs. In aviation, in addition to factors like weight and related variables such as resistance to vibration, corrosion, temperature and other are also considered. The task of this paper is to analyse unconventional designs of wing beams with respect to the current requirements of the aviation industry. In the article, the authors analyse the possibilities of design modification either by adding ribs to the profile, or by changing the cross-section of the profile itself. In practice, such design changes would increase weight, production time and finances, but also increase strength and thus safety. All proposed changes were subjected to strength analyses by FEM (Finite element method) computer simulations. The article output is the selection of suitable designs for further observation and experimental verification to ensure comprehensive results for the possibility of implementation in practice. Despite the non-traditional shapes of the proposed wing beam cross-sections, the authors assume that traditional beam shapes will be gradually modified more efficiently.
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    Experimental state of thrust testing of aircraft reciprocating internal combustion engine
    (University of Zilina, 2020) Mrva, Matúš; Pecho, Pavol; Hrúz, Michal; Škvareková, Iveta; Bugaj, Martin
    The project “Experimental State of Thrust Testing of Aircraft Reciprocating Internal Combustion Engine” is aimed at creating a complex measuring device in order to obtain selected characteristics and parameters of the engine using different types of propellers. In addition to the basic measured parameters such as. thrust, temperature, speed and fuel flow will be a state of the art to test the latest prototype propellers designed for aircraft models. After its construction, the experimental state will be used as a study aid for testing various types of conventional as well as currently developed propellers, engine characteristics and teaching of the whole equipment in the process of teaching, training of aircraft mechanics and for presentation purposes of the University of Žilina.