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Dynamic Analysis of Track
Kulich, Pavel ; Salajka, Vlastislav (referee) ; Plášek, Otto (advisor)
The diploma thesis deals with analytical description of vehicle - track dynamic interface. There are described basic analytical models which are subsequently extended in order to get a more precise description of dynamic phenomena. The aim is to compile a model that faithfully describes the dynamic phenomena in the track. These new compiled models are qualitatively compared with data obtained by measuring in the track.
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Design of Modernization of Bohuslavice nad Vláří Railway Station
Štěpán, Jan ; Pur, Kamil (referee) ; Plášek, Otto (advisor)
The focus of the thesis is to design a modernization of the Bohuslavice nad Vláří train station. The reconstruction design includes an adjustment of the station head and the geometrical layout of the track for an increase of the track speed to the highest possible value. The design also contains a renewal of the railway superstructure and the structure of the sleeper subsoil, new drainage and platforms. The designed layout ensures a safe access for people with reduced mobility.
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Dynamic analysis of track
Mojžíšek, Dominik ; Salajka, Vlastislav (referee) ; Plášek, Otto (advisor)
The diploma thesis deals with descriptions of vehicle - track dynamic interface. There are described basic analytical models of railway track. The numerical models are created by using finite element methods with moving load simulated axle of rail vehicle. The aim of thesis is to create the model which most accurately describes the dynamic phenomena in the track. The results from models are compared with data obtained by measuring in the track. Next aim of thesis is to determine dependency of rail cross-sectional characteristics on equivalent rail head wear and then on rail deflection.
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Tram Transport Serving as a City-forming Element
Csiba, Emese ; Plášek, Otto (referee) ; Valehrach, Jan (advisor)
The topic of this bachelor thesis is the description of existing solutions of individual structures in the field of tram transport. It is a catalogue of possible solutions for tram lines and stops and their basic comparison. The thesis includes analyses of existing designs of stops, alignments of different types of track, etc. and their assessment in terms of creating public spaces with tram transport.
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Design of Modernization of Polička Railway Station
Zvejška, Ivo ; Burda, Petr (referee) ; Plášek, Otto (advisor)
The goal of the diploma thesis is a design of the reconstruction of the Polička railway station in aim to fulfil the requirements for the movement of people with reduced mobility. It was necessary to design platforms with a height of the platform edge 550 mm above rail level. It was also required to increase the design speed in main tracks as well as to reconstruct conections of sidings. There was also included the design of reconstruction of drainage system of railway tracks.
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Design of Modernization of Čadca Railway Station
Juchelková, Lenka ; Šestáková,, Janka (referee) ; Plášek, Otto (advisor)
The master´s thesis deals with a design of modernization of Čadca railway station. Content of the thesis is the design of reconstruction of station heads, increasing the speed in the main tracks to 140 km/h, removal of level crossings for passengers at platforms access and the width adjustment arrangement of the platforms for the safe movement of people with reduced mobility.
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Analysis of the procedure for design of trackbed
Svobodová, Nikola ; Břešťovský,, Petr (referee) ; Plášek, Otto (advisor)
The diploma thesis focuses on analysing the current Railway Infrastructure Administration methodology for designing the sleeper substructure concerning the construction's deformation resistance, its comparison with the multi-layered method, which is used in the road engineering and finite element method. It deals with various methodologies of determining the deformation resistance of the track substructure.
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Train Identification System at Railway Switches And Crossings Using Advanced Machine Learning Methods
Krč, Rostislav ; Vorel,, Jan (referee) ; Plášek, Otto (referee) ; Podroužek, Jan (advisor)
This doctoral thesis elaborates possibilities of automatic train type identification in railway S&C using accelerometer data. Current state-of-the-art was considered, including requirements stated by research projects such as S-Code, In2Track or Turnout 4.0. Conducted experiments considered different architectures of artificial neural networks (ANN) and statistically evaluated multiple use case scenarios. The resulting accuracy reached up to 89.2% for convolutional neural network (CNN), which was selected as a suitable baseline architecture for further experiments. High generalization capability was observed as models trained on data from one location were able to classify locomotive types in the other location. Further experiments evaluated the effect of signal filtering and denoising. Evaluation of allocated memory and processing time for pre-trained models proved feasibility for in-situ application with regard to hardware restrictions. Due to a limited amount of available accelerometer data, distribution grid power demand data were utilized for further refinement of the proposed CNN architecture. Deep multi-layer architecture with regularization techniques such as dropout or batch normalization provides state-of-the-art performance for time series classification problems. Class activation mapping (CAM) allowed an explanation of decisions made by the neural network. Presented results proved that train type identification directly in the S&C is possible. The CNN was selected as optimal architecture for this task due to high classification accuracy, automatic filtration, and pattern recognition capabilities, allowing for the incorporation of the end-to-end learning strategy. Moreover, direct on-site application of pre-trained models is feasible with respect to limitations of in-situ hardware. This thesis contributes to understanding the train type identification problem and provides a solid theoretical background for future research.
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