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Design of a aircraft for towing and basic acrobtics
Loutocký, Jiří ; Šošovička, Róbert (referee) ; Mališ, Michal (advisor)
This master thesis solves conceptual design of aerotow airplane and airplane for basic aerobatics. Airplane is designed by using of specification CS-23. The first part of the thesis solves conceptual design. Especially possible concepts and choice the best one according to requests. Next part deals with flight performance of aerotow airplane in normal flight and also in aerobatics. The third part is engaged in main flight performance in aerotow. 3D system model of whole aircraft and compact disk with mentioned 3D model and electronic version of thesis is also added.
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Phase-correlation based image registration
Druckmüllerová, Hana ; Martišek, Dalibor (referee) ; Procházková, Jana (advisor)
Tato práce se zabývá použitím fázové korelace k určení vzájemné rotace, změny měřítka a posunu mezi digitálními obrazy. Fázová korelace je založena na Fourierově transformaci, proto je popsána Fourierova transformace funkcí definovaných na R^2 i diskrétní Fourierova transformace funkcí definovaných na konečném počtu bodů {0, 1, ... , N-1}^2, kde N je přirozené číslo. Dále je pozornost věnována modifikacím fázové korelace, díky nimž metoda umožňuje nalezení parametrů podobnostní transformace i mezi obrazy, které mají vysoký dynamický rozsah a slabě patrné struktury, obsahují aditivní nebo impulzní šum a jsou pořízeny pomocí různých snímačů a optických soustav. Obsahem práce jsou i modifikace metody pro snímky sluneční koróny pořízené během úplných zatmění Slunce, což patří mezi nejobtížnější úlohy registrace obrazů.
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Unit for utilization of contaminated biomass for energy production
Votava, Jakub ; Broukal, Jakub (referee) ; Kropáč, Jiří (advisor)
The purpose of the thesis is to create preliminary design calculations to determine dimensions, weights and pressure losses of individual contaminated biomass combustion gas treatment nodes. The first part of the thesis deals with the definition of biomass as a fuel, legislative determination of allowed emissions and their description. Then the systems for combustion gas treatments are discussed given their brief description. The practical part focuses on shape designs, determining base dimensions of each type. Weights and pressure losses of individual versions are computed too. In the last part the individual versions are solved with real values and compared to each other.
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Solution of Gear Drive for Camshaft
Barvík, Rostislav ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
For dimensions of crankshaft drive Zetor engine, which is solve by a helical gear drive will be created a dynamic model in MBS (multi body system) and perform analyses. The same way will be created a dynamic model for a spur gear system. In conclusion will be confrontation both of these drive solutions.
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The business models of IT startups based on sharing economy
Šimon, Petr ; Matuštík, Ondřej (advisor) ; Srpová, Jitka (referee)
The aim of this master thesis is to analyze the present condition of sharing economy and design a critical success factors model on a IT startups which operate as a transportation network companies. The result is finally validated on few representative businesses. The problem is solved by the modified qualitative critical success factors method whose author is John F. Rockart. The gained factors were finally used in the causal model which is based on the principles of system dynamics. The outcomes of this thesis are enabling to understand the relations which are hidden behind success of transportation network companies in the area of sharing economy. The information can be useful not only for startups but also for academic sphere and possible investors.
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Effect of an exhaust opening location on air quality in an apartment
Charvát, Tomáš ; Forman, Matěj (referee) ; Krejčí, Vladimír (advisor)
This thesis deals with the influence of the location of exhaust outlets on the air quality. The study examines the performance of the hybrid ventilation system installed in an experimental house. The central point of this work is a numerical model of a bedroom with heat and carbon dioxide sources. The temperature, speed and concentration fields have been solved for, from which further quantities of thermal comfort PMV, PPD and DR were evaluated. Finally, the impact of changes in the quality of the microclimate using these quantities and in the energy efficiency ventilation is assessed.
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Dynamic behavior od rotor dynamics stystem vibrating in a liquid
Chlud, Michal ; Pochylý, František (referee) ; Malenovský, Eduard (advisor)
This thesis deals with dynamic behavior of swirl turbine vibrating in a liquid. Primarily is studied decrease of natural frequencies of rotor due the interaction with fluid environment, namely for different levels of submerged rotor in fluid. After that follows the detection of natural frequencies of swirl turbine in operating speed. The problem is solved by computational modeling in ANSYS system. For this solution is used acoustic elements method. The results are compared with experiment.
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Study of sewerage and wastewater disposal municipality Větřní
Červenková, Martina ; Vachovec, Roman (referee) ; Hluštík, Petr (advisor)
This thesis deals with possible options for solving drainage in the village Větřní - Frymburk st. and School st. and adjacent villages Lužná, Dolní Němče and Dobrné. The first part describes the current state of sanitation of Větřní and its adjacent area. It also includes assessment of the condition of the current sewer system in the village Větřní, which is connected with some newly proposed sewerages. The following chapter deals with the technical description of the possible variants of the drainage sites including economic evaluation. Then there is a recommendation of choices of variant and evaluation of overall investment and operating costs. In conclusion of the chapter there are summarized advantages and disadvantages of variants of drainage.
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Comparison of old and current cine lenses in combination with modern digital camera
Jakubec, František ; HOJDA, Petr (advisor) ; MIKŠ, Antonín (referee)
A Director of Photography has many artistic possibilities when working with cine lenses. Today, we can produce many optical effects in digital post-productions; however, working with lenses and with their defects (aberrations) is very interesting when you use them with modern recording technology. This thesis examines a small part of these issues. The theoretical part is about general qualities of optical systems, their aberrations, and measurement of picture quality. Furthermore, there is also a description of the movie camera and lenses, which were used for testing. The analytical part is about analyzing real footage from tests.
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