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Evaluation of the quality of 3D scanned objects
Paštěka, Marek ; Jaššo, Kamil (referee) ; Vyroubal, Petr (advisor)
This thesis deals with problematics of trasfering real life objects into digital data using 3D scanners. Thesis deals with various 3D scanning technologies and errors of these methods. Main part of this thesis deals with special situations, during which a topology defect may likely occur. These defects most often seriously impact the resulting model in a negative way. For the purpose of maximally describing the issue at hand some very extreme edge scenarios were chosen for these experiments. Thesis also deals with development of a turntable device based on an Arduino microcontroller to help in the process of 3D scanning.
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Increased suction speed of the fire pump using CAE
Hluší, Martin ; Maxa, Jiří (referee) ; Vyroubal, Petr (advisor)
This thesis adresses the issue of designing a new system for flooding the centrifugal pump equipped in the PS-12 type motorized fire pump. Initially the fire attack as a sport and the motorized fire pump PS-12 with the gas vakuum pump are described. Then the problem, this thesis adresses, is covered. The next chapters describe the Computer-aided engineering method and fluid flow with regards to flow through nozzles. Practical part of this thesis starts with simulations of the current gas vakuum pump equiped on the PS-12 pump. The design process of the new flooding system is described next and simulations as well as testing of the constructed prototype are used to validate its function.
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Analyses of properties of photovoltaic inverters
Melichařík, Martin ; Vyroubal, Petr (referee) ; Vaněk, Jiří (advisor)
The thesis deals with photovoltaic systems with a focus on photovoltaic inverters. Solinteg, a company with a growing clientele, needs to set up a workstation to analyse PV inverters and systems at their branch in Brno for the European market. There are different types of system using different inverters and so the analysis for a particular system or inverter may be different. For a thorough analysis of these systems, special laboratory equipment is required, such as special power supplies and loads to simulate fault or operating conditions, complemented by measurement tools such as a power analyzer.
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Modeling of temperature phenomena in Li-Ion cells
Grézl, Vojtěch ; Sedlařík, Marek (referee) ; Vyroubal, Petr (advisor)
This thesis deals with the issue of heat generation in Li-ion batteries, which can have a negative impact on the battery properties and functionality. The thesis can be divided into two main parts. The theoretical part focuses on the theoretical description of Li-ion batteries, heat generation, thermal effects, ideal operating temperatures, modelling of these situations, the occurrence of different types of abuse and the consequences that can arise from incorrect or inadequate thermal management. The practical part focuses on the analysis of the results from the discharge temperature measurements for different load values C and the initiation of the effect known as thermal runaway for 18650 Li-ion cell, and then on how to simulate these behavior in the Ansys Fluent.
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Advanced methods for monitoring li-ion batteries
Vašíček, Jakub ; Čech, Ondřej (referee) ; Vyroubal, Petr (advisor)
This master’s thesis focuses on advanced algorithms for monitoring the state of lithium-ion cells. The introductory section describes the construction and main parameters of these cells. It is followed by an analysis of conventional methods for determining the State of Charge (SoC) and an overview of their main drawbacks. Subsequently, the most frequently used surrogate models for these cells and the methods for their determination are presented. The following section briefly outlines the techniques for monitoring the State of Health (SoH) of cells. After the theoretical part, there is a chapter dedicated to the measurement of a selected cell using the described methods. This includes both laboratory measurements and practical experiments conducted in a real photovoltaic system. Based on the findings and obtained data, an algorithm allowing determination of the surrogate model of the cell during operation was developed. Furthermore, new hardware components for the BMS, which was designed in the previous bachelor's thesis, are proposed. The aim is to eliminate previous shortcomings, enable the implementation of new algorithms, and integrate the device into the IoT platform. New parts of the firmware are also described, and the entire device is tested. In the concluding part, the results of the implemented changes are evaluated.
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Thermal simulation for space applications
Kostelník, Tomáš ; Maxa, Jiří (referee) ; Vyroubal, Petr (advisor)
This master´s thesis is focused on the problem of modelling heat transfer in Earth orbit. In the theoretical part, the main types of standard orbits are described, including terminology related to this issue. Furthermore, the subsystems of space probes are described with a focus on a specific description of their functions. The thesis also includes a discussion of the issues related to thermal management of space satellites, with a focus on multilayer insulation and thermal surface finishes. The work also includes a description of the various mechanisms of heat transfer in space, with a deeper focus on thermal radiation heat transfer, which is key in the context of this thesis. The experimental part is focused on the design of a calculator focused on the computation of radiation boundary conditions for different orbits of a space vehicle and their verification using a CFD solver on a model example of a cubesat.
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Product Innovation Using CAE and Additive production
Bočková, Pavla ; Videcká, Zdeňka (referee) ; Vyroubal, Petr (advisor)
This bachelor thesis is focused on the design and construction of an innovated shape of the clamping mechanism of the one-handed dumbbell. The clamping mechanism model and other parts of the dumbbell are modelled using the parametric modeler called SolidWorks. The resulting model is printed on the Ultimaker 2+ 3D printer using the Fused Depositionion Modeling method. The thesis also includes the introduction of selected CAx systems, the characteristics of Rapid Prototyping as well as the FDM method and materials used. The end of the thesis is completed by the technical economic evaluation of the production of the proposed prototype of a one-handed dumbbell.
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Design and construction of a magnetorquer
Sedlařík, Marek ; Mačák, Martin (referee) ; Vyroubal, Petr (advisor)
This diploma thesis deals with the issue of satellite control using a magnetic field. Describes the physical principle of the magnetorquer and its interaction with the Earth's magnetic field. It contains a summary of advantages and disadvantages of individual solutions and their comparison with alternative control systems. Includes a search of currently available devices. It introduces the standardized CubeSat nanosatellites, their subsystems and ECSS standards, which define the parameters of equipment for space applications. It deals with the issue of the geomagnetic field, its fluctuations and describes selected orbits of the planet Earth. The main part of the work contains a description and implementation of the test system, which consists in the design of the printed circuit board, the program part of the test board and the user interface. This part also includes a detailed design and implementation of a two-axis magnetorquer, including simulations.
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CoreXY type FDM 3D printer
Kyselica, Martin ; Vyroubal, Petr (referee) ; Jaššo, Kamil (advisor)
The aim of this work is a theoretical evaluation of the properties and differences between the relevant 3D printing methods with a closer focus on FDM. The principles of the basic types of 3D printer mechanisms using this technology are explained in more detail and compared with each other. The solution and parts list of FDM 3D printer with CoreXY mechanism is proposed which is then constructed and tested.
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Magnetic field measurement
Dušek, Jiří ; Máca, Josef (referee) ; Vyroubal, Petr (advisor)
Bachelor thesis describes ways and technology for measuring of the magnetic field. Furthermore it deals with comparing sensors for magnetic fields measuring and creating a basic conception of the meter. For design of conception was selected sensor HMC2003 from Honeywell company. Design of conception describes two units, which meter contains. Conception include power, compensation and reset circuits. After that is detailed describe layout of both printed circuit boards, setting up and soldering components. Output of this meter is signal of the three axis of sensor. Meter was subjected to trial run, which verified functionality of the whole device.
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