National Repository of Grey Literature 89 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Artificial intelligence on nVIDIA Jetson platform
Batelka, Lukáš ; Kozovský, Matúš (referee) ; Blaha, Petr (advisor)
The aim of this bachelor thesis is to design, train and implement an artificial neural network in an NVIDIA Jetson Nano embedded device. The first part of the thesis describes the current state of the art of implementing artificial intelligence in embedded devices. The following section describes the tools for developing artificial neural networks and the possibilities of implementing them in a Jetson Nano device. These tools are further used in the thesis to create and train an artificial neural network to detect a fault in preprocessed measurement data on a synchronous electric motor. Finally, the optimization of the trained neural network is described. The achieved results are summarized in the conclusion of the paper.
Condition monitoring of mechatronic systems
Horňan, Bohdan ; Buchta, Luděk (referee) ; Blaha, Petr (advisor)
This thesis is concerned with condition monitoring and quantitative analysis of synchronous motors. Constantly rising requirements on the reliability of motors develop new methods of predictive diagnostics, which can identify failure conditions in the initial stage. Created mechatronic systems with the implemented failure from pre-prepared PMSM model are tested by unconventional condition monitoring methods. Software solutions of diagnostics and model designs of the mechatronic systems are implemented in MATLAB & Simulink. Part of this work is also a short introduction to the issue with necessary theoretical fundamentals and research of some selected methods of predictive diagnostics.
Modeling and Control of AC Electric Drives during Fault Conditions
Kozovský, Matúš ; Glasberger, Tomáš (referee) ; Kuchař, Martin (referee) ; Blaha, Petr (advisor)
Dizertační práce se zabývá modelováním a řízením elektrických pohonů během poruchových stavů. Práce se obzvláště zaměřuje na více-fázové motory. První část práce se zabývá matematickými rovnicemi obecného více-fázového motoru a následným odvozením n-krát troj-fázového zapojení motoru. Modely v dq souřadnicovém systému a modely ve statorových souřadnicích jsou navrženy pro simulaci chování motoru během poruchových stavů. Další část práce se zabývá analýzou poruch ve více-fázových motorech s využitím matematických modelů. Různé vnitřní struktury vinutí motoru jsou analyzovány z pohledu možného řízení během poruchového stavu. Taktéž je prezentováno chování těchto různých struktur motoru během poruchových stavů. Předmětem analýzy jsou elektrické poruchy vinutí motoru a elektrické poruchy výkonové elektroniky. Poslední část práce se zabývá testováním navrženého řídícího algoritmu a navržených kompenzačních strategií pro poruchy na reálných motorech. Pro testování byl použit segregovaný dvakrát troj-fázový motor a experimentální motor s odbočkami pro emulaci poruch vinutí. Provedené testy prokázaly, že vhodně navrhnutý motor v kombinaci se správným řídícím algoritmem a výkonovou elektronikou dokáže zaručit kontinuální běh pohonu i během poruchy.
Hardcore punk in Czecho-Slovakia: From self-organized political protest to political activism?
Bláha, Petr ; Císař, Ondřej (advisor) ; Numerato, Dino (referee) ; Frič, Pavol (referee)
Hardcore and Punk in Czecho-Slovakia: From Grassroots Political Protest to Political Activism? A Case Study of the North Bohemian Hardcore Punk Scene While security concerns are still predominant in Czech subcultural studies, other works have focused on politicisation or taken the anthropological perspective. At the same time, subcultures are the constituent parts of unorganised civil society. Many of their activities are oriented outside the subcultural scene, toward the public space. The present dissertation deals with the hardcore punk subculture as a part of civil society. Its goal was to identify the forms of integration in the public space that are typical of the subculture. The fieldwork was conducted primarily in the Ústí nad Labem Region in the years 2012- 2016. Participant observation and in-depth semi-structured interviews were the chosen research methods. Thematic analysis was subsequently implemented to interpret and analyse the data. The approach was selected following a wide-ranging discussion of the main concepts of subcultural theory, their specifics and characteristics in the post-socialist region. Of central importance were the "core concepts" formulated by Patrick J. Williams, who studied the straight edge subculture around the world. The core concepts could be applied in the study...
Robotic table footbal
Hlavinka, Radek ; Blaha, Petr (referee) ; Pivoňka, Petr (advisor)
This bachelor thesis deals with Robotic table football constructed by B&R. Some shortcommings of current state of game strategy and axis controll are pinted out and corrections are suggests.
Interconnection of AURIX microcontroller with NVIDIA Jetson platform
Smrčka, Michal ; Bartík, Ondřej (referee) ; Blaha, Petr (advisor)
Part of this thesis covers the basics of working with NVIDIA Jetson Nano and AURIX Application Kit platforms, namely TC277 TFT and TC224 TFT. It also theoretically analyzes some peripherals of the platforms. These basics are necessary for the following part, which is focused on the implementation of a serial communication interface for data transfer between platforms. The work describes a program implementation of 2 interfaces: SPI and Ethernet MAC. The communication via SPI (or QSPI in the case of AURIX) is supplemented with the use of GPIO pins, in the case of Ethernet the communication is realized at a link layer using Ethernet frames. The connection via SPI is further tested in a specific application when controlling a BLDC motor using TC224 and AURIX eMotor Drive Kit V2.1, where the measured data is sent to the Jetson Nano for real-time processing.
Inter turn short-circuit detection in vector controlled PMS motor using AI
Zezula, Lukáš ; Kozovský, Matúš (referee) ; Blaha, Petr (advisor)
This thesis deals with the diagnostics of inter turn faults in a vector controlled synchronous motor with permanent magnets. Inter turn faults are detected by the pretrained convolution neural network GoogLeNet from adequately preprocessed signals of phase currents, inverter voltages and electrical angular velocity. Signal preprocesing includes, but is not limited to digital filtration, resampling and Wavelet transform. For the purpose of network training a drive system model is created, capable of simulating inter turn faults. The network is then trained on the simulated data and later validated with data measured on a real drive system, capable of emulating faults. The results of the diagnostics, together with the main problems are presented in the conclusion.
Analysis of PMSM motor inverter behaviour
Buchal, David ; Kozovský, Matúš (referee) ; Blaha, Petr (advisor)
This master‘s thesis deals with the design of a software solution for the AURIX TC234 microcontroller by Infineon Technologies which enables a user to start sampling of the signal at any required moment. A sampling time should be set to the lowest possible value. This solution is then added to the application which is used for a field oriented control of the brushless direct current motor. The obtained values can be further used, for example, for analyzing the waveform of motor currents from which it might be possible to determine the condition of the transistor inverter.
AURIX target in MATLAB Simulink
Chromiak, Michael ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
This diploma thesis deals with the implementation of SIL and PIL simulation for the microcontroller Aurix TriCore TC277D performed in the Matlab Simulink. The realization of the simulation represents, among other things, the implementation of the simulated model into the microcontroller, as well as the creation of an interface for the communication of the microcontroller with the Matlab Simulink. The accuracy of SIL and PIL simulations was verified by comparing the simulated waveforms from the simulation in Simulink. The simulated model used a thermal model of a car cabin created in the previous bachelor's thesis of the author of this diploma thesis. The model in TC277D, as well as the configuration for SIL / PIL is created for use with the C programming language. The work also includes instructions according to which the model and configuration can be modified so that the simulations can be performed on any device containing the necessary software. From the comparison of the simulated data is it clear that the created configuration can be used for SIL or PIL simulation.

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See also: similar author names
2 Bláha, P.
1 Bláha, Patrik
15 Bláha, Pavel
7 Bláha, Petr
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