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Design of 3D scan method based on computer vision
Kratochvíl, Jaromír ; Mašek, Petr (referee) ; Růžička, Michal (advisor)
This thesis deals with designing 3D scan method for visualization of laser beam. The first part deals with the division of 3D scanners and explains how they work. The second part compares various image processing tools and selects the most suitable for this work. The third part proposes a solution that explains the individual methods that were used or considered for this work. The fourth part deals with the solution, explaining how the methods has been created. The next part deals with practical experiments where proposed solutions are applied to different objects in different positions. The last part is the conclusion summarizing the results of this work.
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Relationship between tensile strength and hardness of aluminium alloys
Růžička, Martin ; Jetela, Václav (referee) ; Klement, Josef (advisor)
This thesis deals with relationship between tensile strength and hardness of aluminium alloys. The introduction provides an overview of aluminum aloys and their properties. In the following section there is an analysis of the processing of aluminum alloys. A large part is devoted to the course of precipitation hardening. The second part of the thesis contains a practical part, which describes the methodology of measuring hardness and tensile strength. The measurement process is described below. At the end, the measured data are processed into various graphs and their results are evaluated.
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Replica Design of L-40 "Meta Sokol " Airctaft - fuselage
Růžička, Miroslav ; Pešák, Miroslav (referee) ; Píštěk, Antonín (advisor)
This diploma thesis deals with the design of all-metal construction of fuselage of the replica L-40 Meta Sokol aircraft on the basis of CS-VLA regulation. As far as the aircraft is concerned, the thesis establishes the load of tail surfaces, landing gear and engine bed. Futhermore, it designs the construction of fuselage, tail landing gear, including the system of its retraction, wing-fuselage connection, engine bed and the primary design of cockpit. In the end, the thesis focuses on the fuselage production technology.
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Numerical Modelling of Fatigue Crack Closure
Oplt, Tomáš ; Růžička, Milan (referee) ; Horníková, Jana (referee) ; Hutař, Pavel (advisor)
This Ph.D. thesis was written under the supervision of Assoc. prof. Pavel Hutař, Ph.D., and Assoc. prof. Luboš Náhlík, Ph.D. The thesis is focused on the effect of plasticity induced crack closure, its characteristic and ways of numerical modelling. Premature fatigue crack closure has a significant effect on the fatigue crack propagation rate and therefore on the residual lifetime of a structure. A three-dimensional numerical model allows a detailed look at the stress and strain distribution along the crack front, and particularly it allows a local description of parameters along the crack front which governs the fatigue crack propagation rate. In the first part of the thesis, the study is focused on the influence of a singular stress field at the vicinity of the free surface on the crack front curvature without crack closure being involved. In the second part, a numerical model in 2D of plasticity induced crack closure was created and verified by experimental results. In the final part, a 3D numerical model is used to describe the influence of the crack closure on its fatigue propagation rate and explains typical crack front curvature. The suggested technique allows quantitative accuracy improvement of numerical simulation of the fatigue crack propagation and therefore, more reliable estimation of the residual lifetime of the cracked structure.
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Optical access network management
Bartko, Samuel ; Ružička, Michal (referee) ; Horváth, Tomáš (advisor)
This Bachelor thesis is concerned about optical access network in theoretical part, where it describes working principle of optical network. The main concern is put on passive optical networks, where it describes XGS-PON standard. In practical parts describes connection and making functional network with XGS-PON. In the last part there is a manual for laboratory task, which has a goal of making students understand the issue of activating end point unit in XGS-PON network.
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Evaluation of stereovision algorithms in Computer Vision System for MATLAB
Lauko, Matúš ; Růžička, Michal (referee) ; Grepl, Robert (advisor)
This bachelor thesis is describing limits and features of stereovision application for space orientation using MATLAB tools. The intended use is for a robot. In practical part there is used Simulink 3D Animation Toolbox for scene creation. Frist part is a background research of computer vision, stereovision and MATLAB toolboxes Computer Vision System Toolbox and Simulink 3D Animation Toolbox. In the next part there is a description of model which is used for testing computational algorithm. Subjects to test are speed and accuracy taking into account other factors.
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