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Control of the laboratory model of synchronous drives
Koubík, Martin ; Bílek, Michal (referee) ; Zezulka, František (advisor)
The aim of this theses describes the design of the control program for the synchronous axes model and reconstruction of this model. The first main part is description of synchronous axes model, description of engines and other components of model. Then model modifications are described. Another part is discussing the TwinCAT programming environment and describe all important elements that must be performed for proper functionality of the model. There is also a description of function blocks that are used to program motion sequences. The last part is described of demonstration program and program which would be used for teaching.
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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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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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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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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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SW model of PLC controlled crossing
Simon, Jakub ; Bílek, Michal (referee) ; Zezulka, František (advisor)
The objective of this thesis is to create a software model to control various types of crossroads using programmable logic controller. The control system is created on Siemens PLC SIMATIC S7-300. The programmes of system are written in different programming languages such as GRAPH, STL, LAD. The visualisation is also created to control by using of SCADA system InTouch from the company Wonderware. The visualisation comunicates with the PLC using a DAServer. The visualisation has both, input and output elements, so it is not intended for supervising the run of the control system only, but also for simple user‘s control, using a graphical user interface. It is possible to control the start and stop events of the system, and to switch between different crossroad's control modes and also to trigger the pedestrian's button.
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Analysis of the influence of the gas flow in the placement of the sample in the chamber of the environmental scanning electron microscope
Bednář, Eduard ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
This thesis deals with the simulation of fluid dynamics in environmental scanning electron microscope and evaluate solvers setup, the degree of discretization, choice of turbulent model and proposal optimal design of environmental scanning electron microscope. The theoretical part describes the issue of environmental scanning electron microscopy, software SolidWorks and ANSYS Fluent, basic equations describing fluid status, fluid turbulence, the mean free path of molecules and electron scattering. The practical part of the thesis is to create the model of environmental scanning electron microscope AQUASEM II in CAD system SolidWorks and simulation of fluid flow in the sample chamber before aperture PLA1 by ANSYS Fluent. A series of simulations provided the perfect setting solver. These knowledge are used in the second stage of the practical part, where is proposed optimal shape of the table sample and the input aperture PLA1.
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Analysis of the shape of the intake ports of the current concept differentially pumped chamber
Bílek, Michal ; Vyroubal, Petr (referee) ; Maxa, Jiří (advisor)
This master´s thesis discusses the analysis of the shape of the intake ports of differentially pumped chamber for the current concept. The first part is an introduction to the microscopy issue, then it is focused on ESEM microscopes and it also includes a describtion of the Flow dynamics and a mathematical describtion. In the following chapters the software Solid Works, where the model of differentially pumped chamber is created, and the software Ansys Fluent, which is used for analysis, are described. The second part concerns the proposed concepts and the results of their simulations. At the end of the work the results are analyzed and evaluated.
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