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Design and analsysis of magnetic bearing
Kyanka, Radim ; Ctibor, Jiří (referee) ; Rúra, Dávid (advisor)
The master thesis is focused on literature research and description of magnetic bearings in order to create a design model of a stand for demonstration of magnetic levitation. The simulated model is developed using the finite element method. It also discusses the advantages and disadvantages along with a comparison with conventional bearings in drives. Analytical design is discussed here, which is also simplified and neglects several parasitic effects. These analyses are then discussed. The main part of thesis containe design and calculation for an 8-pole active radial heteropolar magnetic bearing. The result of the design is then applied to the realization of the demonstrator.
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Design and implementation of a platform for control LLC-type inverter with a wide input supply voltage range using a FPGA circuit
Pokorný, Ondřej ; Levek, Vladimír (referee) ; Prokop, Roman (advisor)
This master’s thesis deals with the emulation of LLC converter control with a wide input voltage range using a created emulation platform. The first part of this work is focused on the design of resonant converters with a wide input voltage range. Based on theoretical knowledge, an adjustment of the emulation LLC converter is made. The converter modification is concluded with a simulation, where the correctness of the design and the fulfillment of the ZVS parameter in the entire input voltage range are verified. In the next part of the work, an analysis of the control issues of resonant converters, more precisely LLC type resonant converters, is carried out. The acquired knowledge is used for the design of a new emulation platform, which will serve for the emulation of LLC converter control with a wide input voltage range. The last part of the work is the creation of an emulation program for FPGA in SystemVerilog language. The work is concluded by verifying the functionality of the emulation on physical hardware.
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HMI for a 3D milling machine using FactoryTalk Optix
Uher, Adam ; Foukal, Roman (referee) ; Štohl, Radek (advisor)
The thesis focuses on the design and implementation of an HMI (Human Machine Interface) for 3D milling machine. Basic visualization rules, best practises, principles of ergonomic design, and the creation of user interfaces are described. Visualization tools for the LOGIX PLC series are outlined, which can be utilized in HMI development. Following the guidelines and specified requirements in this paper, a design for HMI is created using the FactoryTalk Optix visualization tool. Changes to the functional safety and PLC program are identified and implemented. Subsequently, the visualization of the milling machine is carried out and the functions of the new system are subjected to testing.
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Possibilities of controlling the greater sage-grouse (\kur{Heracleum mantegazzianum}) by cattle grazing
RYBÁŘ, Štěpán
Undergraduate thesis focuses on the ability to control greater sage-grouse by grazing cattle. The research was carried out on four plots of land near the village of Střítež near the town of Kaplice. Mapping was carried out on each plot in a defined square for a period of four months. In the squares with the presence of this invasive plant, the size and width of the leaf rosettes of the plants were recorded. Subsequently, the species distribution of other plant species was determined. The measured results were recorded in graphs and averages. Finally, suggested actions on plots with this invasive plant are presented. Grazing with higher intensity and frequency, and multiple mowing outside the pasture, seems to be the most suitable method of sage-grouse control for the study site.
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Isle of rats on the edge of rest area
Urbančok, Robert ; Maxmilián, Václav (referee) ; Janů, Valentýna (advisor)
In a work entitled Isle of rats on the edge of rest area, I process memories of childhood educational coercion into an environment that embodies the psychic space of experiencing one's position within the educational construct of parental expectations in an attempt to model the young person's personality through the politics of sport. Learning in the isolated and empathically emptied space of the tennis court, in a system of definitive rules, relationships and values based on a one-way construction of victory over failure, propagating active lifestyles and healthy bodies as a modern individualist religion, maintaining selective socialisation, limiting intuition, creativity and stigmatising otherness in order to class-legitimise personal growth and the representation of one's social position - at the expense of denying one's own identity. Through the appropriation of materials and the aesthetics of the tennis court, I create a space for the curiosity of these repressed childhood memories brought into the present, where I attempt to reflect on them, name the vague feelings, and internally come to terms with them.
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High order numerical method in modelling and control systems
Veigend, Petr ; Horák, David (referee) ; Schirrer, Alexander (referee) ; Šátek, Václav (advisor)
Systémy pro řízení a regulaci jsou používány téměř ve všech průmyslových oblastech. Pro jejich modelování se často používají diferenciální rovnice, které popisují dynamické chování těchto systémů a umožňují je detailněji analyzovat z hlediska přesnosti, stability, výkonu a reakcí těchto systémů v reálném čase. V této oblasti se běžně nepoužívají metody vyšších řádů, protože vykonávají velké množství operací. Tato práce zkoumá numerické řešení obyčejných diferenciálních rovnic s použitím metody s proměnným řádem a proměnnou velikostí kroku, která je založena na Taylorově řadě. Metoda je navržena jak pro lineární, tak pro nelineární problémy a jsou implementovány její optimalizace pro snížení výpočetního času bez degradace jejích vlastností. Pozitivní vlastnosti metody jsou demonstrovány na sadě příkladů z technické praxe. Výsledky práce ukazují, že metoda založena na Taylorově řadě může být použita v oblasti řízení a regulace a má lepší vlastnosti než běžně používané metody.
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Middle-level control of FB-MMC converter in Delta connection
Kokeš, Petr
Control of a modular multilevel converter (MMC) is technically far more complicated than control of a standard 2-level converter. It is not only because of a great number of series-connected cells. For a MMC converter we need to cope with another control level (mentioned here as the middle-level control), which means balancing of voltages among MMC branches and the control of currents circulating inside this converter. For the Delta connected MMC with full H–bridge (FH) cells a convenient method for voltage balancing among all three MMC branches has been analysed and the appropriate control structure has been designed. Then the functionality of this balancing method has been verified using computer simulations and also tested with two MMC physical models operating as active power filters on 400V and 6kV grids.
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Design of special purpose tool for sag measurement
Mejzlík, Jiří ; Vetiška, Jan (referee) ; Houška, Pavel (advisor)
The aim of the thesis is to design a special purpose tool for sag measurement. Three possible solutions are proposed, for each the production cycle time is calculated and its approximate costs are estimated. The best solution in terms of a trade-off between both key quantities is suggested. Next part of the work deals with the selection of suitable drives for the manipulator as well as of the other components for the whole electrical device. Finally, a possible automated control of the complete machinery, including the electrical wiring diagram, is presented.
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Peristaltic pump control via USB interface
Balogh, Jaroslav ; Chmelař, Milan (referee) ; Čech, Petr (advisor)
The purpose of this bachelor’s thesis is to practical realization of connection between peristaltic pump Rainin Dynamax RP-1 and PC, using USB interface. Integrated circuit device FT232R has been used in USB-RS422 converter, due to modified RS422 interface, which the pump RP-1 uses. There was also developed software for pump’s remote controll. RP-1’s functions can be driven from remote side or eventually automatized with this software. This work is based on semestral thesis and in future can be used in another aplications with RS422 or with RP-1 pump. Department of Biomedical Engineering, attached to FEEC, Brno University of Technology, will use this remote controll in analysis of DNA.
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Bus wiring systems for complex building management
Mokrý, Lukáš ; Macháček, Jan (referee) ; Bátora, Branislav (advisor)
The aim of my thesis is to examine current opportunities of bus wiring systems for complex building management, mainly its power and economic evaluation. It can be simply called intelligent electrical installation. I will examine two systems from INELS and ABB company. These systems contain functional components, mainly modules and controllers. By means of other materials, I’ll create a panel. Components will be placed there and electrically connected. After this, systems will be put into operation and programmed by means of their software. The next step is measuring of quatities during the various conditions of systems and consumption, which is one of the main aims of the thesis. Two apparatuses will be used for measuring. This thesis itself will contain theoretical analysis of systems, their description, using the way of operation and main advantages and disadvantages. Single components and complete process of measuring and working in laboratory will be described. An overall evaluation and comparison of the systems from various points of view, including the price, will be put together from results.
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