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Wireless communication between remote PLC and lab model
Bílek, Michal ; Šír, Michal (referee) ; Štohl, Radek (advisor)
The main goal of this bachelor thesis was to get familiarised with programmable devices from the Rockwell Automation company and with radio modems from the Satel company. The aim of the thesis was to control a model of a fractionating column situated in a distant laboratory. The device, designed to be controlled inside the lab, assessed the data which it received from the fractionating column model and sent the data by which it controlled the column. For wireless communication between the devices a radio modem Satel 3ASD was chosen. The thesis describes the visualisation and communication of the controlling of the fractionating column model. In the final phase the functionality of the designed visualization and communication was tested.
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Influence of experimental chamber pumping on gas temperature
Balobanov, Damir ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
The master‘s thesis is focused on issue of pumping in the experimental pumped chambre of an environmental scanning microcope. In the theoretical part, there are presented microscopy as science. Afterwards the thesis is focused on electron microscopy and its problem and vakuum system, computer program used for preparation of simulation and study that the experimental part is based on. The experimental part contains the results of gas flow in the differential pumped chambre. The problematics were solved by Ansys Fluent system.
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Analysis of the dimensions of pumping channels in a new design of a scintillation detector
Kryll, Josef ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
The aim of this thesis is to study the issue of eniveromental scanning electron microscopy and pumping gas to create a vacuum in the newly designed scintillation detector. Further, creating a model of recently proposed scintillation detector and simulating and analyzing pumping gas in differentially pumped chamber of detector and the results compare with the previous model. The theoretical part deals with electron microscopy, electron sources, electron optics and secondary electrons detectors. It is also presented which signals are generated by the electron beam on the surface of a solid. Further fluid flow issues and equations describing the flow in the solved chamber are dismantled. Furthermore, the impact of gaseous environment on the trajectory of primary electrons, because there are collisions of primary beam with atoms and molecules of gas. The following section discusses creating, quality and importance of the network in mathematical modelling. A method of a final volume used to calculate the differential equations describing the flow of gas at the premises of the microscope is described . The practical part consists in creating a model of scintillation detector and analyzing the gas flow in drawing a vacuum in the newly designed scintillation detector. Furthermore, the simulation results are compared with the results of simulations on the older type of scintillation detector. The output of this thesis is model of recently proposed scintillation detector with visualized simulation results.
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Robotic hand controll using virtual reality
Sláma, Pavel ; Bílek, Michal (referee) ; Vyroubal, Petr (advisor)
This bachelor thesis deals with possible solution of controlling robotic hand with virtual reality. To realize this work is used a prosthetic hand from the InMoov project. This thesis describes basic principles of 3D print technology and deals with materials suitable for manufacturing of a chosen robotic hand. As next describes function and controlling of servos, hand control using prototyping platform Arduino communicating with the computer with MyRobotLab software support. To capture movement is used motion sensor for virtual reality Leap Motion.
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Flow analysis with respect to the turbulence in the measuring chamber of the meter
Lepltová, Kristýna ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
This work deals with the simulation of fluid dynamics in the ultrasonic gas meter with regard to standardized disturbances in the supply line of the meter. The theoretical part describes the problems of ultrasonic gas meters and basic equations describing fluid status and fluid turbulence. Further, utilized ANSYS Fluent. The aim of practical part is to create a 3D solid model of the measuring chamber of the ultrasonic gas meter with a variety of standard faults using SolidWorks subsequent analysis using ANSYS Fluent, assessing the nature of the flow in the standard range of flow rates.
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Numerical model of Li-Ion battery temperature field by discharging
Novotný, Jakub ; Bílek, Michal (referee) ; Vyroubal, Petr (advisor)
This work is focused on lithium-ion batteries in general and their modeling capabilities in ANSYS Fluent. The various advantages and disadvantages of li-ion batteries are describes in my work. There are also described the various models and submodels offered by ANSYS Fluent. An essential part of the work is to model the real battery and compare the results between the real battery and the simulation itself. Finally, simulation of battery breakdown is performed.
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Slupkové galaxie a modifikovaná Newtonova dynamika
Bílek, Michal ; Jungwiert, Bruno (advisor) ; Růžička, Adam (referee)
Our work has two recherchive parts. The first is devoted to the shell galaxies and we describe the observational facts here, different models of origin and the possibility of determining the gravitational potential with the use of shells. The second part is on the modified Newtonian dynamics (MOND). We explain what it consists in, its implications and its experimental tests. The third part is devoted to our numerical simulations of a shell system evolution both in the classical and modified dynamics. Our mission is to explain the differences in the two simulation theoretically and to verify, whether the result of the modified simulation oppose the observed shells around the galaxy NGC 3923. The conclusion is it doesn't, but our test is not very strong.
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Galaxy interactions: dark matter vs. Modified Newtonian dynamics (MOND)
Bílek, Michal ; Jungwiert, Bruno (advisor) ; Kroupa, Pavel (referee) ; Stuchlík, Zdeněk (referee)
MOND is an observational rule for predicting the acceleration of stars and galaxies from the distribution of the visible matter. It possibly stems from a new law of physics. I list the theoretical aspects of MOND, its achievements and problems. MOND has been tested mainly in disc galaxies so far. Its tests in elliptical galaxies are rare because the MOND effects are small for them in the parts observable by the conventional methods. In the thesis, I explain the methods and ideas I developed for testing MOND in the ellipticals using stellar shells. Moreover, the shells enable us to test MOND for stars in radial orbits for the first time. The shells are results of galactic interactions. I discuss the shell formation mechanisms and summarize the findings from shell observations and simulations.
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