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Use of photogrammetry in machine parts reconstruction
Raclavský, David ; Straka, Tomáš (referee) ; Repka, Martin (advisor)
This thesis provides a general overview of the various 3D scanner designs and focuses on 3D scanners using the principle of photogrammetry and presents their current representatives on the market. In the practical part, the procedure of constructing a machine component using reverse engineering methods is described, where the scanning process and the creation of a CAD model are presented, followed by a comparison of the result with the original 3D scan.
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Optimizing a highly loaded components for motorsport
Šišpera, Petr ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with optimizing the rear suspension of the fifth generation Honda Civic for motorsport application. The goal is to reduce weight while increasing stiffness and precision in wheel control. The work is based on the properties of serial components, which are analyzed using FEM analysis in the Ansys program. Load conditions are calculated from vehicle dynamics and the loading of individual arms from the suspension kinematics. Suspension components are first modeled and analyzed and this data provides input information for optimization. Individual components are initially topologically optimized, based on which models are created for deformation stress analysis. The properties of the serial parts are ultimately compared to optimized ones under the most critical loading conditions and the result of the work is an optimized suspension system with lower weight and higher stiffness.
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Preparation and design of the production of bevel gears using the Reverse engineering method
Šimáček, Daniel ; Sedlák, Josef (referee) ; Slaný, Martin (advisor)
This thesis addresses the reverse engineering of the assigned gears. The first part is dedicated to a theoretical review of the issues related to bevel gears, strength calculations of the gearing and defects that can occur during operation. This is followed by the production of bevel gears with helical teeth and the most common heat treatment of gears. The second part emphasizes the actual process of reverse engineering, describing the digitization of gears and their conversion into a solid body in CAD software. After obtaining the key dimensions of the gear set, an analytical calculation of the load capacity in contact and bending is performed, accompanied by a numerical calculation using the finite element method to determine the bending stress at the tooth root. Dimension verification is conducted through dimensional analysis in specialized software to potentially reveal deviations and inaccuracies in construction based on 3D scanning. The final part deals with the design of the technological process for the production of gears, followed by a technical-economic assessment of the preparation and actual production of the gears. The drawing documentation was created based on the 3D volumetric models generated from the scanned gears
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None homogenous robot swarm creation
Bělohlávek, Jan ; Bergeon,, Yves (referee) ; Křivánek, Václav (advisor)
The subject of this thesis is enabling the DJI Robomaster S1 robot to be used as an autonomous drone in a robotic swarm. This is achieved by an analysis and documentation of the robot's internal communications protocol and the implementation of this protocol into the system. The Robomaster S1 is an educational robot, that the University of Defense in Brno wants to use for experimenting with swarm formations. However, the design of the robot does not allow for it to be controlled by external code and its source code is not public. The robot's main computer controls the rest of the robot via CAN bus, this communication was reverse engineered and the individual commands were documented. The robot's main computer was replaced with an ESP32, which now sends the commands itself and controls the robot. A wireless control method, which utilizes the ESP-NOW protocol, was also implemented. This enables the user to control the robot manually, but also serves as a foundation to enabling several robots to communicate with one another. With the applied modifications the battery life also significantly improved. The robot can now be used in a robotic swarm.
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Code Analysis and Transformation
Křoustek, Jakub ; Masařík, Karel (referee) ; Meduna, Alexandr (advisor)
This paper describes methods and procedures used for code analysis and transformation. It contains basic information of a science discipline called reverse engineering and its use in information technologies. The primary objective is a construction of tool that can disassemble from binary form to symbolic machine code. This operation is highly dependent on the concrete instruction set, and it has to be used for a beforehand known processor architecture. This problem is solved with patterns, plug-ins, and modularity of disassembler. These features provide users the ability to add new instruction sets into this disassembler. The output is the text representation of instructions and is functionally equivalent to the in-put. The thesis demonstrates usual methods of disassembly as well as the methods made by the author.
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Use of 3D technology in foundry industry
Straka, Pavel ; Krutiš, Vladimír (referee) ; Pernica, Vítězslav (advisor)
The work is focused on replacing a faulty briefcase handle with an aluminium substitution. The handle is fabricated with the help of reverse engineering, where the handle is scanned with a 3D scanner. With that information, a model copy of the part is made, which is 3Dprinted from PLA and PolyCast materials. These handles are used as expendable models, which are used for casting using an “investment casting” method. Those are made from an AlSi10Mg alloy. Theoretical part deals with additive technologies, which are mostly used for manufacturing of foundry models and moulds. Next, the basic principles of 3Dscanning are described, and the term reverse engineering is also explained.
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The Production using 3D Printing of Fixture for Shaping Plastic Pipes
Tretera, Robin ; Sedlák, Josef (referee) ; Kalivoda, Milan (advisor)
This Bachelor thesis compares two options in production of shaping form for plastic pipe - handmade production versus 3D print technology (specifically DMLS method). The thesis contains detail description of the final part and shaping form with pros and cons of both production methods. Handmade production is more suitable for serial production with its lower price. In time pressure 3D printing comes up with its fast and repeatable results.
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Assembling and Functional Verification of a Home 3D Printer
Tesař, Jaroslav ; Zouhar, Jan (referee) ; Sedlák, Josef (advisor)
This thesis was created as a bachelor project in the Faculty of Mechanical Engineering at VUT in Brno. In the theoretical part, the additive technology Rapid Prototyping is introduced together with the most common methods, followed by the assessment of advantages and disadvantages of the new technology and its possible uses in various fields of human activity. In the experimental part of the diploma thesis was assembled and the printing parameters were set. Consequently the comparison models were printed on the 3D home printer and on professional printer Dimension uPrint. The accuracy of the printers is compared. The thesis concludes with the analysis of technical and economical parameters.
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Usage of 3D scanning in precise injection moulding
Chylík, Michal ; Čudek, Vladimír (referee) ; Zatočilová, Aneta (advisor)
The aim of this bachelor thesis is creating a complex study on the topic of 3D scanning and reverse engineering regarding technical praxis. Part of this bachelor thesis are three examples of usage. Using 3D scanner for reconstruction of plastic parts in marketing praxis, specifically for recovering of missing data and subsequent valuation. Using 3D scanner as an inspectional tool - a support for measurement of quality of plastic moulding. And last but not least an option of creating an identical part to fit requirements of tool shop. The drawing documentation including protocol for inspect and 3D models are included in the thesis.
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