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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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Security Analysis of Selected Android TV Box
Švenk, Adam ; Veigend, Petr (referee) ; Tamaškovič, Marek (advisor)
Popularita TV boxov so systémom Android v poslednom čase výrazne vzrástla. Okrem toho, že ponúkajú širokú škálu funkcií, je čoraz aktuálnejšia otázka, či sú dostatočne zabezpečené a chránené. Táto práca popisuje komplexnú bezpečnostnú analýzu vybraného Android TV boxu, ktorá zahŕňa hardvérové aj softvérové komponenty. Skúmaním zraniteľností prítomných v zariadení sa táto práca zameriava na identifikáciu potenciálnych rizík pre súkromie a bezpečnosť používateľov. Okrem toho navrhuje odporúčania na zmiernenie týchto zraniteľností.
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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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Cross-flow turbine - reverse engineering
Řeha, David ; Haluza, Miloslav (referee) ; Hudec, Martin (advisor)
This thesis deals with the reverse engineering of the cross-flow turbine. The departement of fluid engineering was given a model of the cross-flow turbine many years ago, however it has never been put into service and nothing is known about it. This thesis describes the analysis of the turbine design, the replacement of parts that occurred to bring the turbine into service, and how the turbine was modified for the process itself. Furthermore, based on the dimensions obtained estimation of the parameters, for which the turbine was designed, was carried out. A measurement track was set up for that purpose and the turbine was measured in the laboratory conditions. Real values of the turbine parameters and the subsequent evaluation of the universal characteristics of the turbine were obtained by the measurement. This thesis includes also the construction of a measurement tutorial for students.
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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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Digital twin skin of the drinking water treatment plant - development and use in practice
Sochorová, Helena ; Andreides, D. ; Hložanka, F. ; Prokopová, Michaela ; Stejskal, O. ; Chalupa, L. ; Šmejkalová, P. ; Dolejš, P.
The contribution presents experiences with the development of a digital twin for optimizing the control of the DWTP within the pilot project in the Železná Ruda locality. The digital twin consists of two components, i.e. digital documentation in the object architecture processed by the reverse engineering process, which is data-connected with the real physical infrastructure (virtual replica of the infrastructure) and a simulation tool based on a mathematical model or a neural network (simulation of the water treatment process). Both components are accessible to the user via a web application, in which one can choose from three operating states (monitoring of the real state - default, simulation of scenarios of operating settings and prediction of pressure loss).
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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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Decompilation of Specialized and Advanced Instruction Sets
Holub, Juraj ; Kolář, Dušan (referee) ; Křivka, Zbyněk (advisor)
V dnešnej dobe je proces analýzy nebezpečného softvéru dôležitou súčasťou informačných technológií. Jedna z kľúčových techník je spätný preklad škodlivých binárnych programov. Spätný preklad je komplexný proces, ktorý rieši niekoľko projektov. Projekt RetDec sa zameriava na flexibilný návrh a riešenie spätného prekladača s možnosťou znovupoužiteľnosti. Cieľom tejto práce je zlepšenie spätného prekladu pokročilých inštrukčných sád pre architektúru x86. Bola navrhnutá nová optimalizácia pre FPU registrový zásobník. Bola rozšírená podpora prekladu inštrukčných sád jednotiek FPU a SSE. Nové rozšírenia boli implementované a otestované z hľadiska efektivity a kvality spätného prekladu.
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