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Time synchronization by IEEE1588 protocol
Hříbek, Šimon ; Arm, Jakub (referee) ; Fiedler, Petr (advisor)
The thesis focuses on implementing time synchronization using the PTP protocol on the STM32H747 platform to assign precise timestamps to acquired samples using the ADC converter. The chosen platform is specifically the STM32H747 Discovery Kit development board. The thesis includes a description of available libraries necessary for implementing time synchronization. One area also covers the procedure for setting up the Ethernet interface available on the development kit. The thesis also addresses the selection of suitable methods for evaluating the achieved results.
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Opensource firewall redundancy
Škurla, Tomáš ; Zeman, Václav (referee) ; Slavíček, Karel (advisor)
This diploma thesis deals with the comparison of different open-source firewalls from the perspective of high availability topology. The goal of the thesis is to determine the most suitable firewall for implementing a topology with high availability. The theoretical part deals with the explanation of the concepts of address translation, the operation of firewalls, and subsequently describes the protocols necessary for the implementation of high availability, followed by a description of the testing using GNS3. The practical part of the thesis describes the preparation of the laboratory environment, as well as the process of configuration and testing of the individual firewalls, followed by an evaluation based on the test results.
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Dynamic modelling of active railway traction feeders for power quality assessment
Bureš, Jan ; Doleček, Radovan (referee) ; Klusáček, Jan (advisor)
The thesis is focused on modelling of traction feeders for 25 kV 50 Hz traction system in order to assess the influence on voltage quality at point of the connection in 110 kV distribution grid. With respect to various technology of traction feeders, the feeder models, including conventional feeding system and modern converter stations, emphasize operating principle, detailed power circuit structure and description of influence on voltage quality in the distribution grid. The selected technologies of traction feeders are modeled in simulation software PSCAD and influence on voltage quality at the point of connection is assessed via an example, which reflects a realistic operation of traction vehicles in the typical traction system. The models are parametrizable and thus can be used for the connectivity assessment for the distribution system according to national distribution system operators’ standard PNE 33 3430-0. Moreover, the thesis also deals with the use of modern converter feeders for auxiliary frequency services. The operation principle is demonstrated on examples where the basic algorithm and requirements for control layer of converters is described. Finally, an algorithm for synchronization of the feeders supplying adjacent 25 kV 50 Hz railway traction system sections is designed and presented by means of simulation. In general, the thesis shows the use of dynamic models for connectivity assessment to the distribution grid in pre-project phase and for definition and development of converter feeders use cases upon feeding of the railway traction system.
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Computational Methods for Comparative Music Performance Analysis
Ištvánek, Matěj ; Róka,, Rastislav (referee) ; Jirásek, Ondřej (referee) ; Smékal, Zdeněk (advisor)
Zvyšující se dostupnost digitálního hudebního obsahu a různých interpretací hudebních děl zároveň podněcuje vývoj výpočetních metod oboru získávání hudebních informací (MIR). Tento rozvoj ale nemusí být vždy reflektován v souvisejících oblastech – například v analýze interpretačního výkonu (MPA). Hlavním tématem této disertační práce je využití výpočetních metod a digitálního zpracování hudby pro cíle MPA. Tato práce se zabývá principy MIR pro analýzu a porovnání rozdílů hudebních výkonů a jejich parametrů. Práce analyzuje limitace detektorů nástupů tónů a dob založených na konvenčních přístupech a na strojovém učení, při degradaci vstupního signálu, snížení vzorkovací frekvence, nebo v komplexnějších hudebních strukturách. Dále ukazuje možnosti použití hudební synchronizace, extrakce parametrů a výběru příznaků na originálních datech smyčcových kvartetů pro binární klasifikaci původu interpretů. Na závěr demonstruje vyvíjený software pro komparativní analýzu hudby, který kombinuje přívětivé uživatelské prostředí pro přehrávání, navigaci a vizualizaci dat hudebního výkonu s výpočetními metodami MIR.
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Supporting algorithms for electrical motor control
Řezáč, Martin ; Buchta, Luděk (referee) ; Blaha, Petr (advisor)
This thesis is focused on a creating supporting drivers and algorithms for electrical motor control using CPU TriCore TC275 CA. The first part is devoted to processor description and selected peripherals, which are A/D converter, a timer for creating the PWM signals and the second timer for processing singnals from encoder. All drivers are tested on an aplication kit, which is equipped with TC275 CA processor. The second part analyzes the measurement quality of GMR sensor TLE5009. Special testbench was prepared for sin cos data capturing and for their comparison with precise encoder position measurement. It was composed from DC motor having both sensor types on commons shaft. Data are acquired using LabView. Subsequently, it analyzes the sensor data, their compensation and subsequent comparison with measured data from the encoder.
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Transfer and Backup of Text Messages (SMS)
Černý, František ; Křivka, Zbyněk (referee) ; Kolář, Dušan (advisor)
The subject of this bachelor thesis are two cooperating applications to backup, restore and to view SMS messages. The first of the implemented applications, designed for the Android operating system can backup and restore SMS messages using XML file. The application also enables synchronization of the imported file with existing short text messages. The second application is used as an extension for Thunderbird email client. This extension lets you view imported text messages, synchronize your saved short text messages with contacts in SMS threads, search in saved file and synchronize existing SMS information with newly imported file. The extension also allows exporting a file with SMS messages and uses this exported file in application for Android operating system.
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Wi-Fi enabled sensor node
Usnul, Jan ; Gutman, Jiří (referee) ; Hynčica, Ondřej (advisor)
This work evaluates uses of standard IEEE 802.11 in automatization industry specifically in measurement industry. This work measures and evaluates chip CC3200 from Texas Instrument company, which include processor Cortex M-4 from ARM company and network procesor CC3100 from Texas Instrument company integrated in one chip.
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Firmware for the Robotic Vehicle
Otava, Lukáš ; Sojka,, Michal (referee) ; Kučera, Pavel (advisor)
This thesis is focused on a firmware for robotic vehicle based on the ARM Cortex-M3 architecture that is running a real-time operating system (RTOS). Theoretical part describes available solutions of embedded RTOS and concrete HW implementation of the robotic vehicle. There is also comparison of the three selected RTOS with their measurements. Result of this thesis is base firmware compounded by a program modules that controls HW parts. There is also a sample PC and firmware application that extends base firmware. This sample application is able to communicate with robotic vehicle, control wheel motion and measure process data.
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MySQL and MS SQL Database Synchronization
Šimanovský, Filip ; Grégr, Matěj (referee) ; Trchalík, Roman (advisor)
This thesis describes the synchronization of MySQL and MS SQL databases . It explores and describes differences between these two database servers and further designs and implements alghorithms for their safety and economicaly favourable synchronization . Designed methods are implemented in a console application afterwards . Two case studies are used as an illustrative of its work . The result of this thesis is a manual on how to successfully convert MySQL database to MS SQL database (and vice versa ) and the convert application itself .
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