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Overview of the development of flying cars
Kosír, Samuel ; Zikmund, Pavel (referee) ; Daněk, Vladimír (advisor)
This bachelor’s thesis is an overview of flying cars. The first part of the thesis describes their design. This part is further split into sections about technical requirements, take-off & landing modes, pilot modes, power types, propulsion system architectures, and transition between airplane mode and vehicle mode. In the second part is closely described development of flying cars in chronological order. The third part addresses legislative problems and regulations that apply to flying cars.
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Wing leading edge active flow concept analysis
Mahdal, Vít ; Zikmund, Pavel (referee) ; Popela, Robert (advisor)
This research is focused on substitution of commonly used High-Lift devices by active flow control on the wing leading edge. The analysis is done by CFD tools with use of Reynolds-Averaged Navier-Stokes (RANS) method. In the beginning of the research, commonly used High-Lift devices are described. Solver setting and its explanation together with verification and validation is described in the following chapters. An active flow control concept is testing at the LS(1)-0413 airfoil, for 5 different positions of slots, two different slots widths (h/c= 0,0025 and 0,005) and two different blowing velocities (v_Jv_=2,22 and 4,44). In the end of this paper, physical phenomena of blowing is described together with evaluation of different cases. The best case is compared with Fowler and slotted flap at Reynolds number 2,2 million.
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Aviation impact on global warming
Štarha, Adam ; Juračka, Jaroslav (referee) ; Zikmund, Pavel (advisor)
This bachelor‘s thesis deals with the issue of ever-increasing aviation emissions. It describes where greenhouse gases appear and what their excessive amount causes. Furthermore, this work deals with the comparison of emissions of individual modes of transport and the comparison of the benefits of individual modes of transport, especially air transport, through subsidies and tax relief in the EU.
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Universal characteristics of piston engines with a propeller
Šafránek, Martin ; Matějů, Jiří (referee) ; Zikmund, Pavel (advisor)
Determining the characteristics of piston engines with a propeller is a complex task. Accurate calculations are based on engine and propeller characteristics from the manufacturers, which are, however, quite demanding. It is also possible to use simplified models that can predict the achievable values of propeller efficiency and fuel consumption. They are based on a simple propeller efficiency and maximum power. However, these models are often very inaccurate, which is a significant disadvantage. Therefore, it is possible to use the universal characteristics of propeller propulsion units, which offers a more accurate calculation of power and fuel consumption using a relatively simple model. The diploma thesis deals with a summary description of all characteristics of reciprocating internal combustion engines and propellers. A mathematical model was created here, which works according to a certain algorithm based on the joint work of the engine and the propeller. This model can predict the required power and fuel consumption in different flight modes much more accurately. The results were applied to the performance of ultralight aircraft, especially to the range, which was significantly increased.
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Comparison of selected criteria of flight characteristcs on an airplane simulator
Melich, Peter ; Zikmund, Pavel (referee) ; Matějů, Jiří (advisor)
As of today, we might consider PC technologies as very progressive and advanced. Due to this fact, we have numerous commercial flight simulators available on the market nowadays. However, each flight simulator has it’s own specific characteristics and behaviour and that’s why I’m going to compare selected flight characteristics in the chosen flight simulator on a chosen aircraft type (Cessna 172SP in my case) and it’s comparison with measured data from real-life environment in this thesis. Data comparison will show us how accurately simulator responds to inputs from the user and if the simulation is similar in relation to real conditions.
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Reusable launcher flight mission
Metelka, Dominik ; Daněk, Vladimír (referee) ; Zikmund, Pavel (advisor)
Tato práce je rozdělena do dvou hlavních částí, které jsou také hlavní cíle. Cílem první části je popis mise vícenásobně použitelného prvního stupně nosné rakety. V této části je nejdříve přiblíženo téma znovupoužitelných kosmických systémů a jejich vývoj do současné doby. Hlavně jsou však v této části popsány operačně používané vícenásobně použitelné nosné rakety, kde u každé z nich je poté popsána jejich letecká mise. Dále jsou zmíněny některé důležité nosné rakety ve vývoji a také jaké jsou způsoby návratu prvního stupně. Druhá část je praktická a cílem je návrh mise návratu prvního stupně nosné rakety na zemi. Pro výpočty byly zvoleny parametry podle současné rakety Falcon 9, ze kterých byla analyticky vypočtena finální rychlost a výška, ve které se první stupeň oddělí od zbytku rakety. Pro návrat a celkový let byl pomocí programu MATLAB napsán skript, který vypočítal a vykreslil potřebné parametry a charakteristiky. Díky tomu bylo také zjištěno, v jaké výšce bude potřeba znovu zažehnout motory, aby první stupeň bezpečně přistál na zemi.
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Aerodynamic tuning of small sports airplane
Orság, Boris ; Zikmund, Pavel (referee) ; Popela, Robert (advisor)
This bachelor thesis deals with the experimental modification of the aerodynamic elements of the aircraft and their testing for the influence and performance of the aircraft during the flight. The introduction acquaints the reader with the class of ultralight sports aircraft and specifies the aircraft used for the experiment. The following is a research part of selected aerodynamic effects on the performance and characteristics of the aircraft in flight and also describes the types of airflow. The experimental part describes the assumed design errors of the aerodynamic surfaces of the aircraft and its bonnet, with the experimental solution and the results obtained. Evaluation describes the effectiveness and meaningfulness of individual adjustments based on the results of the experiment.
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Assistant systems in car and aircraft control
Novotný, Timotej ; Horpatzká, Michaela (referee) ; Zikmund, Pavel (advisor)
The bachelor thesis deals with assistance systems in cars and aircraft. The aviation sector is focused on GA aircraft. This thesis describes assistance systems used in cars and aircraft, their contribution to traffic safety and limitations of these systems. The comparison of assisting systems in the automotive and aviation industries shows the difference in the speed of development in individual areas, which is caused mainly due to strict requirements for safety and reliability of aviation systems. Furthermore, we can see the difference in implementation of systems monitoring the condition of a driver/pilot. Although the work of a pilot is more demanding than the work of a driver, today’s aircraft do not have a system for monitoring the condition of a pilot or an emergency landing system. Part of the thesis concerning future assistance systems in aviation is devoted to the system monitoring the pilot’s condition and the automatic landing system. Both systems are still under development. However, experiments have shown that these systems could be implemented in future aircraft and increase aviation safety. The last part of the thesis mentions the future of assistance systems, which create a path to autonomous vehicles.
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Joystick with variable force
Peťovský, Dan ; Horpatzká, Michaela (referee) ; Zikmund, Pavel (advisor)
This thesis deals with the design of joystick mechanism with force feedback function. The first part contains description of forces in the control of aircraft and description of the mechanisms used for the joysticks with force feedback function. The second part contains the design of the mechanism and knowledge in completing the prototype.
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Effect of stress on pilot performance
Dedinský, Miroslav ; Zikmund, Pavel (referee) ; Šplíchal, Miroslav (advisor)
The main goal of this diploma thesis is to find out whether it is possible to measure stress during piloting. If so, it would be possible to develop systems that could help pilots in stressful situations and thus alleviate the stress, this would have great impact and possitively improve work performance. There are few similar studies in the field, the stress factors that affect the pilots and what physiological changes are observable in such situations. Finally, an experimental measurement is performed during three flights, which is aimed to demonstrate the information obtained and thus the possibility of measuring stress and the metod to do so.
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