|
|
Design of metasurfaces for advanced optical elements
Březina, Tomáš ; Kvapil, Michal (referee) ; Hrtoň, Martin (advisor)
Metasurfaces represent an intriguing class of materials with a wide range of promising applications, one of them being advanced planar optical elements for industrial production and imaging. The main goal of this thesis is to design such an optical element, namely a beam-shaper consisting of dielectric anostructures in HCTA (high constrast transmitarray) arrangement. The first part of this work introduces a simplified theoretical model of the optical response of building blocks that facilitates understanding of the basic functional mechanism behind the phase metasurfaces. To quantify the optical response of dielectric building blocks with enough precision, numerical FDTD simulations were employed. As a result, a database compatible with lithographic fabrication procedures was created. To find the phase distribution ensuring the desired beam-shaping function, two approaches were investigated and implemented: the semi-analytical method of geometric transformation and the iterative Gerchberg-Saxton algorithm. The final output of this work is then the distribution of building blocks within the metasurface that imprints into the impinging beam the previously calculated phase profile.
|
|
|
RECONSTRUCTION AND REBUILDING OF CITY BREWERY IN VYŠKOV
Vršanová, Dominika ; Zemánek, Václav (referee) ; Boháč, Ivo (advisor)
The bachelor thesis will solve the design of the transformation of the existing premises of the original bishop's brewery with a three-hundred-year tradition into a multifunctional complex fulfilling the following tasks. Renewal of production in the form of a small city brewery, adding new functions for the presentation of the brewery and cultural and social events. Reconstruction and completion of architecturally valuable objects, adding new objects for new functions.
|
|
|
Reservoirs - Brno, Zluty kopec (Yellow hill)
Navrátil, Zdeněk ; Nytra, Milan (referee) ; Nový, Vítězslav (advisor)
The task was to design a new use for three former underground reservoirs on Žlutý kopec in Brno and its area. The main goal of the pre-diploma project was to define the use of reservoirs, which is reflected in the urban design. Connections, entrances to the area, the use of existing buildings and overall use of the area is part of the urbanism part. The main design itself contains the building of the information and visitor center, which allows access to the oldest and youngest reservoir. The design of the building uses different height levels in the area and connects the street level with the park level.
|
|
|
Design and implementation of demonstration model "double inverted pendulum"
Slabý, Vít ; Brablc, Martin (referee) ; Bastl, Michal (advisor)
This thesis describes the process of rebuilding an experimental model of a single pendulum on a cart into the double pendulum on a cart. The control algorithm in MATLAB/Simulink environment for stabilization of the pendulum in the inverse position is designed. For this purpose, LQR state feedback control was implemented. Also method for swinging the pendulum into inverse position from stable state (swing-up) was designed. Feedforward method was utilised for swing-up control. In the thesis, functionality of these algorithms is shown.
|
|
|
SLAVKOV - REVITALISATION OF BONAPARTE CENTER
Kousalová, Barbora ; Plášil, Jiří (referee) ; Boháč, Ivo (advisor)
The bachelor thesis deals with the design of a multifunctional complex consisting of the existing Bonaparte restaurant building and new outbuildings on the neighboring parcel located in Slavkov u Brna in the urban conservation area in the immediate vicinity of the castle grounds. The newly created complex provides the necessary missing public functions at the level of contemporary standards. It offers an answer to the concept of neoplasm in the historical environment and its interaction in the context of the second part - a reconstructed historical building. The multifunctional complex of both buildings should provide classrooms for elementary art school, restaurant, social hall, library, information center, public toilet, seniors / youth club or maternity center, polyfunctional spaces for rent, spaces for dental surgery.
|
|
|
Effect of orientation on solar systems performance
Daněk, Tomáš ; Weismanová, Júlia (referee) ; Jaroš, Michal (advisor)
The work explains the influence of orientation and inclination on the performance of solarcollector. The first part shows how the formation of the solar energy and how it gets onEarth and in what form we are able to capture it. In the second part of the work focuses on the basic parameters of the solar collector and method of calculating theperformance and efficiency. The next section describes the most common types of solarcollectors and their field of application. In conclusion the results of the calculation andevaluation of the influence and orientation angle on the performance of a particular type of solar collector.
|
|
|
Jaroslavice – place in the landscape
Dočekalová, Veronika ; Eichlerová, Eva (referee) ; Ponešová, Barbora (advisor)
The aim of this thesis is to design improvements to increase the quality of the living in the territory of Jaroslavice and its surroundings. This South Moravian rural area located near the Austria–Czech Republic border may currently be considered as a No man's land. Given the subject of the thesis, the author suggests the conceptual solution of this problem. Focusing on the life in a border region analyses offer of the local development, amenities and opportunities, not forgetting about the education. The work suggests an entirely new local education system from the very beginning - from kindergartens to secondary education. The missing high school forces students to travel or to move to nearby towns such as Znojmo. what usually leads to their breakaway from the local environment. This could be avoided by building a new secondary school in Jaroslavice. It would link to the rich history of this village from the pre-war period, when it was considered an important transition point between the cities of Brno and Vienna. Besides, Czech-German school can re-establish mutual cooperation between both countries. Designated school is based on a current education needs, e.g. practical training experiences in local businesses, which is costs saving and immediately applicable. The subject of this thesis is placed into the area of the ruined mansion under the local castle. Besides school, there is also Food Center and Research Institute. All three institutions cooperate together, similarly to the concept of manor court (meierhof) in the past. Educational facilities are arranged in U-shape form with the inner courtyard and the large greenhouse on one side. Each wing of the building is self-sufficient and has a different character. The west wing is two-storey, on the ground floor there is a library with classrooms for social sciences and the heart of the house - room for theatre and performances. On the second floor there is a school headquarters facing the courtyard with the ability to check the daily routine. The central wing with entrance consists of classrooms of natural sciences and another social science classrooms located towards the courtyard for eventual outdoor lessons. Last part consists of computer classrooms made for the technical sciences. This wing leads to the lower floor with side entrance to a parking lot. Greenhouse, designed for both the public and the students, is an inseparable part of the school.
|
|
| |
|
|
Analysis of model operation of multi-degree-of-freedom energy harvester
Witassek, Tomáš ; Rubeš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
The first part of this bachelor’s thesis is an overview of vibration energy harversters with multiple degrees of freedom. Several options of broadening the usefull frequency bandwidth thanks to multiple degrees of freedom are described in the overview. The following part is a model in Matlab & Simulink analyzing behaviour of a vibration-powered generator with a harmonic excitation and another one with a real excitation. The main focus is on the output electrical power and energy in relation to geometrical parameters and electromagnetic damping.
|
|
|
Design of metasurfaces for advanced optical elements
Březina, Tomáš ; Kvapil, Michal (referee) ; Hrtoň, Martin (advisor)
Metasurfaces represent an intriguing class of materials with a wide range of promising applications, one of them being advanced planar optical elements for industrial production and imaging. The main goal of this thesis is to design such an optical element, namely a beam-shaper consisting of dielectric anostructures in HCTA (high constrast transmitarray) arrangement. The first part of this work introduces a simplified theoretical model of the optical response of building blocks that facilitates understanding of the basic functional mechanism behind the phase metasurfaces. To quantify the optical response of dielectric building blocks with enough precision, numerical FDTD simulations were employed. As a result, a database compatible with lithographic fabrication procedures was created. To find the phase distribution ensuring the desired beam-shaping function, two approaches were investigated and implemented: the semi-analytical method of geometric transformation and the iterative Gerchberg-Saxton algorithm. The final output of this work is then the distribution of building blocks within the metasurface that imprints into the impinging beam the previously calculated phase profile.
|
guest ::
