Theses (Department of Mechanical Engineering)
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Theses collection of the Faculty of Engineering.
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Theses (Department of Mechanical Engineering) Szerző szerinti böngészés "DE--Műszaki Kar"
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Tétel Korlátozottan hozzáférhető 3D scanning and manufacturing design of an engine pistonNi, Gaoyuan; Bodzás, Sándor; DE--Műszaki KarThe main objective of this thesis consists of developing a three-dimensional (3D) model of a piston head using Computer Aided Design (CAD) software. Although AutoCAD software is primarily focused on two-dimensional (2D) applications, it was chosen for this thesis because of its ability to generate 3D models as well. After completing the 3D model using the computer-aided design (CAD) software, I traveled to the lab and utilized the 3D scanning equipment to capture the physical piston head. I then performed a comparative analysis of the aforementioned 3D model and the scan results with the aim of identifying any potential discrepancies or inaccuracies. This stage was completed with the help of Mr. Dániel Nemes, who provided invaluable assistance throughout the process. Initial comparisons showed significant differences between the produced and scanned 3D models. Therefore, I optimized the accuracy of the piston head 3D model by optimizing it. Subsequent analysis showed that the error of the improved model was below an acceptable threshold. The third objective of this thesis was to develop a machining process for the piston head using EdgeCAM software. Proficiency in milling and turning machining techniques was achieved by exploring the relevant PDF learning resources available on the official EdgeCAM website and by utilizing instructional videos available on the Internet. During the initial design phase, I realized that the unique composition of the piston head did not allow for the use of only milling or turning methods in the machining process. Therefore, it was decided to use Solidworks software to divide the 3D model of the piston head into different parts. The upper portion of the piston head was manufactured utilizing turning machining techniques. The upper part of the piston head is manufactured by the turning machining process while the lower part of the piston head is manufactured by milling machining process. At the initial stage of the design process, it is vital to determine the appropriate blank for the machined object. Subsequently, fixtures and machine tools must be set up accordingly. The EdgeCAM 3D model is then utilized to determine the specific features to be machined. Finally, the machining design is carried out, including determining the relevant cutting tools, the type of machining (e.g. rough turning, rough grooving, finish grooving) and the specific type of machining based on the feature to be machined. In turning, different operations such as rough turning, rough grooving, finish turning, finish grooving, and cut-off require the adjustment of specific parameters for each operation. Similarly, milling encompasses a variety of machining techniques, including roughing, contour milling, and face milling. The final goal was to optimize the machining process design. I successfully optimized the milling process for the lower part of the piston head on two occasions, reducing the machining time from 51 minutes to 13 minutes the first time and 9 minutes the second time.Tétel Korlátozottan hozzáférhető An Output Power-levelling in Wind Energy Conversion SystemDemberel, Odmaa; Nemes, Dániel; DE--Műszaki KarThis research focuses on the critical challenge of output power-levelling in Wind Energy Conversion Systems (WECS), specifically addressing the application of Doubly-fed Induction Generators (DFIG). In the context of the global transition toward renewable energy, the optimization of wind energy systems is paramount to ensuring efficiency and reliability. The significance of this research lies in its direct impact on the operational stability and performance of DFIG-based wind turbines, a technology extensively utilized in modern wind farms. Power fluctuations, particularly in varying wind conditions, pose a significant obstacle to the seamless integration of wind energy into the power grid. The primary objective of this research is to provide a comprehensive understanding of the control system of DFIG wind turbines, with a specific focus on its capabilities during fault conditions, namely voltage dips. The investigation employs a dual approach, combining theoretical modelling and simulation models to analyse and understand the normal operation of DFIG systems. The simulation model, with an emphasis on the wind turbine model, serves as a powerful tool for comprehending the intricacies of the system under steady-state conditions. Theoretical models establish a foundational understanding of the DFIG system's behaviour during normal operation, offering insights into the interplay of various components, such as power converters and control systems. Simulation models, on the other hand, provide a visual representation of the DFIG system's behaviour, particularly the wind turbine model, enabling a dynamic exploration of the system under normal operating conditions. The visualization of signals and behaviours during steady-state conditions serves as a crucial reference point for further analysis. This understanding becomes pivotal when examining the system's response during voltage sags and other operational circumstances. This research not only contributes to addressing the challenge of output power-levelling in DFIG-based wind turbines but also enhances our understanding of their behaviour under varying conditions. The combination of theoretical insights and simulation results provides a comprehensive framework for optimizing the control systems of DFIG wind turbines, ultimately contributing to the reliability and stability of wind energy systems in the broader context of renewable energy integration.Tétel Korlátozottan hozzáférhető Analysis and development of shop floor management in a unique manufacturing companyOjogbo, Udehmaguna David; Matkó, Andrea Emese; DE--Műszaki KarThis thesis investigates the various methodologies and intricacies involved in the operation of the shopfloor in a manufacturing company. The study focuses on Burkle Hungary kft, and their unique approach to production and tackling various operational and technical challenges involved in maintaining a well-functioning production line, as well as developing on the current ones. The importance of understanding the broad picture of the shopfloor and how it operates cannot be over-emphasized, as this dictates the smooth flow of activity across the entire production and monitors the quality and efficiency of the current processes. An in-depth analysis of the Quality, Cost, Delivery, Safety and Morale (QCDSM) technique, as used by the manufacturing company is the cornerstone of this research, along with various underlying principles and methodologies associated with shopfloor-management. A series of observational studies and analysis of company material was conducted, coupled with a comprehensive review of the relevant literature in the field of production, management and engineering processes. The benefits of the analysis of the shop floor process lies in having a much more holistic view of how the production line works, and in so doing, an improved material flow, as well as information flow occurs on the shopfloor, losses are uncovered quickly and analysis of productivity and efficacy with the help of visual management tools, is made simple, direct and effective. Information flow is crucial in ensuring operations are run smoothly, this flow of information and material bridges the gap between technicians and managers, this research shows how effective information flow coupled with the various lean techniques and methodologies, can lead to an improved and more efficient production line.Tétel Korlátozottan hozzáférhető Analysis and Testing of 3D models and infillsGillani, Syed Musa Hassan; Balogh, Gábor; DE--Műszaki KarIn the thesis work, you will be learning about the general effects of Infills. Measurements of each infill such as the general stress and strain have been calculated. Anycubic Kobra 3D printer and Anycubic 3D PLA filament are used for the tests. Furthermore, each infill in the software Ultimaker Cura has been used. Ever since the start additive manufacturing has faced many problems. Some of them include an overhang layer, materials not bonding together properly, and not enough knowledge of the infills and the effects, such problems affect the print quality and have increased defects. The main purpose of this thesis is to understand the effects of each infill where they can be distributed and used in different objects. This can help us reduce the amount of material we use and, in some cases, infills can also reduce the time taken for something to manufacture. The 3D printing technologies with defined infills and uses can expand easily, and such infills can further be integrated into multiple software and help in part optimization. To understand the effect properly, I designed 2 Tests with different properties. The properties included layer heights, wall layer counts, infill density, and top and bottom layer thicknesses. These properties were changed for the tests and the results were observed for differences. After reducing the layer counts and allowing the infill to have more space in the test sample the results were observed. A tensile testing machine with an integrated optical image camera to measure the accurate strength and strain of the materials was used. The final results were compared and the infill effect. The effect of walls was also observed in each test where reducing the wall count more space was available for the infills and a larger difference with results completely dependent on the infills was observed.Tétel Korlátozottan hozzáférhető Analysis of Spur Gear Design Parameters and Surface Finish for Robotic ApplicationAbdelfattah, Sama Khaled Abdalla; Bodzás, Sándor; DE--Műszaki KarSurface roughness plays an important role in machine performance. The scope of the study discusses the parameters that need to be considered when studying gear surface roughness and what their values mean in robotic applications. It also discusses how gears are manufactured and what the most important processes in gear production are, as well as evaluates the labor productivity of each process. The Smartic M device is a surface roughness measuring tool that is used for the purpose of measuring the surface roughness of spur gears. Measurements have been obtained and narrowed down to the most optimal and the least optimal results. The study established a standard that any Ra value greater than 0.8 μm and any Rz value greater than 10 μm is simply unacceptable. These ranges have been determined in regards to robotic applications. An analysis of the ranges of obtained results was further narrowed down so that an assessment could be made of the effectiveness of the mechanism if the quality of its surface finish was either efficient and to optimal levels or inefficient and problematic, as well as how an industrial robotic arm would behave if the said spur gear was utilized in its system. The study then delved deeper into spur gear manufacturing in order to investigate what optimal mass-produced spur gears would look like in a production system. To do this, the Tecnomatix Plant Simulation software was used to set up CNC, drill, hobbing, heat treating, and grinding stations to produce a mass of spur gears similar to the sample gear that constituted the design of this study. The labor productivity statistics of all of these stations was evaluated during the study and the results were satisfactory in terms of similarity to the gear manufacturing analytical system. Another production system was developed on the plant simulation software, however, it was for the purpose of studying the performance of a robotic arm when its level of efficiency is drastically reduced and when it is somewhat efficient. The results of the simulation showcased that it would be quite realistic for a robotic arm to have an availability rate of 89%, but it would be completely unacceptable for the availability rate to be 48% as that would be contingent to a failure rate that exceeds 50%, which is problematic for any manufacturing system to possess such an inefficient tool in its line.Tétel Korlátozottan hozzáférhető Analysis of the selection and review of suppliers in Burke HungaryKhazrati, Heidar; Matkó, Andrea Emese; DE--Műszaki KarThe success of any manufacturing company heavily relies on the efficiency and dependability of its supply chain. This study focuses on the aspects of selecting and evaluating suppliers specifically looking at Bürkle Hungary, a company that faces challenges due to relying on a single supplier for an important component called the Cast Part. The main goal of this study is to provide an analysis of supplier management strategies emphasizing the significance of diversifying suppliers and conducting thorough pre-qualification assessments to improve the resilience and performance of the supply chain. "One key element for a supply chain is strategic supplier management." This research dives into the complexities involved in identifying suppliers assessing the risks associated with relying on a source for supplies and explores best practices for broadening one’s supplier base. It also evaluates how advanced technologies such as AI, blockchain and IoT can modernize supply chain operations. The thesis investigates the challenges faced by Bürkle Hungary in maintaining a consistent supply of the Cast Part and assesses how well the company performed before and after implementing recommended supplier management strategies. The study addresses challenges encountered by Bürkle Hungary during their transition, to a diversified supplier base. These include helping employees adapt to procurement processes providing comprehensive training programs and integrating technological solutions into their supply chain operations. The study suggests that by diversifying suppliers utilizing technology effectively and conducting thorough supplier assessments a company can enhance its supply chain performance. However, achieving these improvements requires dedication and a long-term commitment to ensure the sustainability of these changes. Although there may be obstacles, this strategic shift in supplier management holds the potential to enhance operational efficiency and promote greater stability, within Bürkle Hungary supply chain.Tétel Korlátozottan hozzáférhető Application of AI in Autonomous VehiclesNaat, Yacine; Menyhárt , József; DE--Műszaki KarThis thesis is about the innovation of the various Application of AI in Autonomous Vehicles with a focus on the lane detection technology. Investigating the crucial task of precisely identifying and tracking lane boundaries, which is essential to facilitate secure and efficient self-driving navigation. This study comprises a thorough examination of existing literature related to algorithms used in detecting lanes with particular emphasis on computer vision and machine learning methods. The research, via experimental analyses evaluates the state-of-the-art algorithms' performance under diverse real-lifelike scenarios in virtual or simulated eviroment. Through the use of simulations, the thesis aims to evaluate how lane detection python algorithms utilising machine learning libraries respond to different conditions and road layouts and how modern machine learning models and AI trends can be harvested in the automotive industry. The research involves the use of a simulated environments mimicking real-world conditions, allowing for controlled experimentation and analysis. The challenges of real-world deployment occlusions, dynamic road conditions and diverse lane markings types are emphasised. The thesis also investigates how dependable can lane detection algorithms be, by monitoring the accuracy and error margin values with each training and observing the simulated car behaviour. Acknowledging a crucial need for robustness and versatility within autonomous navigation systems is given special attention in this thesis. Additionally, the thesis discussed the advantages and limitations of using simulated environments for testing and validating lane detection algorithms compared to real-world testing. Consideration of ethical and safety implications in the transition from simulation to real-world deployment were taken into consideration. In conclusion, the thesis end result showed a high-accuracy prediction of the lane detection developed for this project within the simulated environment, offering valuable information for researchers and developers working on autonomous vehicle systems. The findings contribute to the understanding of how well these algorithms perform in controlled, virtual settings, aiding in the refinement and optimization of lane detection systems for future real-world applications.Tétel Szabadon hozzáférhető Assembly design and finite element analysis of a basketball rimDaniel, Uduoise Osemudiamen; Bodzás, Sándor; DE--Műszaki KarDuring the course of the educational presentation although how tedious the compilation of documents publications and books seem, I was able to learn more about to perform and render 3d and 2d models with the aid of computer aided software like solid works. And there take said design and work to analyzed through the finite element analysis method in other to truly understand the importance intricates and complexity of material selections. Now I would like to talk about the ideal rim. The ideal rim remodification I would say is the first the backboard. The rim breakaway or breakaway rim was designed with the same ideology of the flexible rim but with the exception of the movement of a joint in the pivot of the connection between the board and rim. The breakaway rim is created to fix two main functions namely to maintain the same rebound characteristics of the rigid rim to ensure consistency of play and the fact fair play is involved. And secondly to absorb the great impact of the weight of players when they hand on the rim or pull sharply on it. In other to perform this role to the maximum we will need to combine the rigid and flexible rim mechanism creating the perfect rim.Tétel Korlátozottan hozzáférhető Comparison and evaluation of energy storage systemOgunmola, Ifeoluwa Opeyemi; Szendrei, János; DE--Műszaki KarEnergy storage has been a challenge right from the beginning of the renewable energy revolution, The popularity of intermittent renewable energy is growing, as the storage of fixed and mobile energy continues to be a crucial area of focus. Electricity is not capable of being stored, but it can be transformed into other forms of energy that are capable of being kept. These stored forms of energy can then be converted back into electricity as needed. Energy storage systems can utilize many technologies such as electrochemical in form of batteries, supercapacitors, Mechanical in the form of flywheels, CAES, and Pumped hydro, thermal modules, Superconducting magnetic, power to gas and hybrid systems. This study compares and evaluates the battery storage options through meticulous sizing calculations, clarifying the relationship between capacity, power, efficiency, and lifetime factors especially with regard to the recently implemented Solar Plusz Program (Napenergia’24), and power to gas, potential and hybrid storage options with the use of some formulars and calculations to consider the sizing of these technologies and compares the criteria needed for sizing. The review that was carried out shows that a hybrid energy storage system performs better in terms of microgrid stability and reliability when compared to applications that use a simple battery energy storage system with case studies. Hybrid energy storage system (HESS) is the best option for energy storage because a single energy storage system cannot meet every demand at once. So, choosing the right combination of storage solutions is essential for a system design that is cost-effective.Tétel Korlátozottan hozzáférhető Computational Fluid Dynamics Analysis of Tesla CybertruckElzamar, Mostafa Ahmed Mostafa Mohamed; Szodrai, Ferenc; DE--Műszaki KarThis thesis investigates the aerodynamics of the Tesla Cybertruck, with a focus on enhancing its overall efficiency. Objectives include a detailed analysis of airflow patterns and drag forces, employing advanced computational fluid dynamics (CFD) techniques. The study addresses existing gaps through a literature review, drawing insights from analogous geometries and drag reduction studies on pickup trucks. Methodologically, precision mesh generation techniques such as double precision, local sizing, and curvature meshing are applied. The simulation setup is rigorously validated through sensitivity studies and comparisons with Numeric Systems GmbH, establishing the reliability of the methodology. Tasks encompass the examination of separation bubbles, sharp edges, wake dynamics, and vortex shedding patterns, contributing to a comprehensive understanding of Cybertruck aerodynamics. The conclusion highlights key findings derived from the analysis. The identification of a separation bubble at the front of the hood and the impact of sharp edges on airflow dynamics provide valuable insights. The study reaffirms its credibility through comparisons with Numeric Systems GmbH, showcasing the robustness of the simulation methodology. The results contribute not only to academic knowledge but also hold practical implications for optimizing the Cybertruck's performance. The applicability of these findings extends to the broader discourse on electric vehicle design, offering insights for practical design strategies to enhance performance and efficiency.Tétel Korlátozottan hozzáférhető Design analysis and optimization of helicopter rotor headYabaneri, Yigit Arda; Hajdu, Sándor; DE--Műszaki KarThis thesis is an overview of the design process of an assembly. It includes the design, Analysis, Optimization, and Materialization of a Helicopter Rotor Head. Designing the Main Helicopter Rotor-Head using modern design software. Followed by Optimization according to Computational Analyses. Finally, the materialization of the optimized assembly by additive manufacturing.Tétel Korlátozottan hozzáférhető Design and Additive Manufacturing of a Flat Form ToolRahman, Shahbaz; Bodzás, Sándor; DE--Műszaki KarThe focus of this in-depth study is largely on the application of additive manufacturing in the creation of a flat form tool; an integral component utilized in several engineering applications. The study progresses with a holistic approach where each stage lends itself to the more broad-scope objective of reimagining the process of tool production through advancements in 3D printing technologies. Initially, the study embarks upon an in-depth analysis of the flat form tool, from both a constructional and analytical perspective. Essentially, this aspect lays the basis for the forthcoming design stages and the actual production methodologies. Furthermore, this study encircles the creation of CAD models for both the tool and the workpiece. The entire layout procedure enlists sophisticated modelling patterns tailored specifically to enhance precision and maximum functionality to develop models. Thus, paving the path for an efficient production process attuned to accuracy. Following the design phase is the actual operationalization of additive manufacturing of the tool. The Ultimaker 3, 3D printer is pressed into service, using PLA (Polylactic Acid) material, for manufacturing the tool. The Ultimaker Cura Slicer Software has been utilized to transform intricate digital blueprints into precise physical entities, with efficient material usage. Lastly, a finite element analysis (FEA) is performed on the produced tool to gauge its performance amidst operational situations. The results of this evaluation offer vital understanding of the tool’s mechanical idiosyncrasies, thereby aiding the ratification of design selections and corroborating functionalities along with resilience. Overall, this thesis proves conclusively that additive manufacturing holds viability and obvious benefits when it comes to producing tools tailored for unique requirements. Ultimate power of 3D printing in transforming tool production shouldn’t be neglected as it offers flexibility, waste minimization and heightened productivity. The study marks a potential ground breaker in its domain, revealing an all-encompassing mechanism to tool formation and manufacturing. By doing so, this study opens doors to future developments and potential advancements in additive manufacturing application in an extensive spectrum of industries.Tétel Korlátozottan hozzáférhető Design and Analysis of a Solar Powered Car, Optimising for Sustainable MobilityEssil, Desmond Armoh Annan; Menyhárt, József; DE--Műszaki KarThe escalating global demand for green energy solutions has moved solar-powered vehicles into the spotlight as a promising avenue for reducing carbon emissions and mitigating environmental impact. This thesis investigates sustainable transportation, with a primary focus on the design and analysis of a solar-powered car. The study delves into the complex interrelation of automotive design principles, solar technology integration, and spatial optimization on the car body. The research journey encompasses four primary tasks. Drawing inspiration from leading solar-powered models such as Stella Terra and Lightyear One, the first task of this study builds an innovative design that seamlessly incorporate solar panels into the car's form without compromising aesthetics, aerodynamics, or functionality. To validate the design's efficiency, Solidworks Flow Simulation was employed for CFD analysis to evaluate the efficiency and viability of the car body. Aerodynamic factors are all examined to strike a balance between reduced drag and enhanced solar exposure. The CFD analysis not only validated the design but also informed iterative improvements. The third task delved into the integration of solar panels without compromising aerodynamics. Through meticulous consideration of panel placement and orientation, arrays are feased to strike a harmonious balance between solar energy harvesting and aerodynamic efficiency. The final task leveraged Simulink to model and simulate the solar energy collection and conversion process. The simulation showcased how energy harvested from the solar panels on the car's roof was efficiently converted and stored in the battery packs of the car. Though not modelled in detail, the prototype exibited very low drag and reduced pressure clouds around many vantage points during the simulation, which speaks to an Optimized Solar Car Prototype. The Simulink simulations also revealed how increased panel area on the body of the car proportionally affects the energy generated. Beyond the technical aspects, this thesis also raises awareness and interest in sustainable transportation solutions. The integration of solar power into everyday vehicles could inspire discussions on cleaner energy sources and influence public perceptions of eco-friendly mobility. Environmentally clean, socially equitable, affordable, economically viable, efficient and safe mobility is only possible through cooperation among the govemment as well as businesses and individuals.Tétel Szabadon hozzáférhető Design and Analysis of belt conveyor using Finite element methodKinyua, Lynn Wanjiku; Hajdu, Sándor; DE--Műszaki KarFinite element method and CAD are popular techniques that support and streamline a number of construction and simulation-related tasks. A scenario where these techniques are utilized, engineers and companies benefit from savings in terms of costs, time, and resources when this software is used. This thesis finite element approach has been utilized in design and analysis. A conveyor belt system is designed and a roller is analysed using the SolidEdge software. As the solid edge software is used for both the assembly and modeling process of the part, it is simpler to modify the model as it is being designed to match the intended size and to identify any compromises that may need to be made in order to obtain the most precise and optimum design. SolidEdge has a simple to use FEM program that facilitates analysis. It provides simulations with meshes ranging from coarse to fine, enabling accurate depiction of the forces operating on it. The simulation module makes it possible to perform analysis and prediction in order to identify the maximum projected stress that can be applied on the roller and put to use in the implementation. The roller displacement can also be observed upon implication of the force. In addition to, factor of safety of the roller can be determined once the analysis is done. The factor of safety is used to determine how much load the roller can withhold before it deforms.Tétel Korlátozottan hozzáférhető Design and Implementation of a Dual-Axis Mechanism for Precise Rotational ControlAl Yamani, Mohammad Jihad; Nemes, Dániel; DE--Műszaki KarIn the realm of mechanical engineering, this thesis delves into the design, implementation, and optimization of a dual-axis mechanism controlled by an Arduino-based system. The primary objective is to seamlessly integrate theory and application, addressing the nuanced challenges of motor selection, gear system design, and control algorithm optimization. The literature review establishes a foundation by comprehensively surveying existing research on dual-axis mechanisms, and identifying gaps, controversies, and areas requiring further exploration. The design phase navigates through the complicated process of gathering requirements, specifying constraints, and leveraging 3D printing for fabricating gears, ensuring the mechanism aligns with size, mass, cost, and operational demands. Subsequently, the focus shifts to motor selection, where torque requirements are calculated, and a systematic approach guides the selection of a motor capable of optimal efficiency and reliability. This selection anchors the creation of a control system, employing the Arduino Uno circuit board, to orchestrate motor movements seamlessly. Experimental validation becomes a must in the fourth task, necessitating a rigorous setup to assess the mechanism's performance under varied loads and motion patterns. Data from these experiments enables a comprehensive evaluation of accuracy, repeatability, and speed, providing insights for potential improvements. Throughout this thesis, the simplicity and clarity of the code governing the control system underscore the fundamental principles of mechanical engineering. The successful assembly and testing of the circuit validate the theoretical foundations, affirming the practical viability of the designed dual-axis mechanism. This thesis goes beyond simple mechanical assembly, unfolding as an exploration through the combination of theory, design, and experimentation. It incorporates the core principles of mechanical engineering as they are applied to the dynamic domain of dual-axis mechanisms.Tétel Korlátozottan hozzáférhető DESIGN OF A DARRIEUS TYPE WIND TURBINEPatel, Aksh Hemantkumar; Szodrai, Ferenc; DE--Műszaki KarTo summarise this thesis paper, I will briefly elaborate each of my major check points, and the results I obtained in and amongst all the research and simulations, as well as my own cognitive reasoning and understanding in the topic. Firstly, I introduce and explain what category of wind turbines the Darrieus type wind turbine is part of and which specific type of Darrieus Type Wind turbine. The Darrieus type wind turbine is categorised as a Vertical Axis Wind Turbine (VAWTs), this is due to the way it is set up unlike the usual wind turbines, they rotate around the vertical axis. More, specifically, I focused on the Helical shape of the Darrieus type wind turbine, as to eliminate inconsistency due to the curvature of the wind profile around the circumference of the wind turbine. This allows for a smoother output of torque and rpm that can be fed into the step-up gearbox, and finally, to the generator. Secondly, I ran simulations on the wing profiles I would think would be most suitable for the implementation into a Darrieus type wind turbine, and then perform the wind simulation using Ansys Discovery, to understand its behaviour in similar wind condition to as it would have, if it were to be implemented in the capital of Hungary, Budapest. The wind speed I found and used was 3.67m/s. The wing profiles I chose to perform my simulations on were the NACA 63(3)-618 and the NACA 0018, and compare the two against each other with each determining factor that would affect how it would behave if it were to be implemented on a Darrieus type wind turbine. I then performed multiple repeated simulations to make sure the results are consistent, and output the following data; Velocity, Total pressure and Static pressure. All the results pointed to the NACA 63(3)-618 being the more preferable wing profile between the two, due to its significantly higher value of Coefficient of Lift, and a negligible amount of slightly higher value of drag compared to the NACA 0018, which in fact maybe more useful as it may aid in rotations of the wind turbine as the wind passes by the wing profile. Finally, I compare my results to the literature already published and verify my results. My results show that the NACA 63(3)-618 is the more preferable wing profile, as there are many research papers published that note that they tested other NACA 6-series wing profiles and they performed really well to be used in a wind turbine and commercially is the shape mostly used for VAWTs and not the NACA 0018. Furthermore, my NACA 0018 performance data compares very similarly to the research paper from University or Stuttgart and University of Warsaw and this shows that there is a good level of accuracy between my work and other already published works, which shows that the simulations I have performed on the NACA 63(3)-618 are accurate and reliable. I also chose a well-fitting step-up gearbox and generator to go with the wind turbine design, thus making it theoretically plausible with the NACA 63(3)-618Tétel Korlátozottan hozzáférhető Designing a 3D printerEgbi, Daniel Bofa-Okim; Nemes, Dániel; DE--Műszaki KarThis thesis investigates the theoretical development of a 3D printer with exceptional accuracy, with a specific emphasis on virtual modelling, simulation, and optimisation methods. The suggested printer is designed to overcome the inherent difficulties of traditional 3D printing, with the goal of achieving unsurpassed precision in the creation of complex three-dimensional objects.The research commences by conducting a thorough examination of current 3D printing technologies, with the aim of identifying their constraints and potential areas for enhancement. Using sophisticated modelling tools, the thesis introduces an innovative conceptual design to improve accuracy and address typical printing problems.In addition, the conceptual design is situated within the wider scope of additive manufacturing, investigating potential uses in several sectors like medicine, aerospace, aviation, and mass customisation. The theoretical framework outlined in this thesis provides a roadmap for future academics and engineers aiming to transform these principles into physical technology.Ultimately, this research introduces an innovative and original blueprint for a 3D printer that achieves exceptional accuracy, thereby paving the way for progress in the field of additive manufacturing. The provided theoretical framework provides a clear plan for practical applications, hence creating new opportunities for precise engineering in three-dimensional printing.Tétel Korlátozottan hozzáférhető Development and optimization of a prosthetic hand: design, control and functional evaluationAbdelaal, Serag Abdelnasser Sayed; Almusawi, Husam Abdulkareem; DE--Műszaki KarThe complexities of mechanical design in the development of a prosthetic hand are thoroughly examined in this thesis. The index finger is used as a standard to emphasize the standardization of finger design. Thorough Finite Element Analysis (FEA) is carried out to guarantee the prosthetic hand's robustness to varying loads. After that, the finger is subjected to a thorough kinematic analysis that treats it as a dual 4-bar mechanism and offers a complete understanding into its dynamic behaviour, velocity, and location over time. The assembly procedure is analysed in detail together with material selection criteria that prioritize PLA to highlight the strength and practicality of the mechanical design. The investigation additionally extends its scope to include sensors and a control system, with servomotors and electromyographic (EMG) signals being the main type of integration. The functionality of the prosthetic hand is improved by the ensuing integration. Thorough validation using SimScape Multibody produces outcomes that confirm the system's correct operation and careful attention to its mechanical components.Tétel Korlátozottan hozzáférhető Development of energy-efficient fans for ventilation of data centersPernabekov, Azamat; Szodrai, Ferenc; DE--Műszaki KarThe study is devoted to the current issue of developing energy-efficient fans specifically designed to ensure efficient ventilation in data centers. The first task carefully analyzes and selects the most optimal fan type to meet the stringent cooling requirements of a data center. The main attention is paid to the development of an energy-efficient axial fan model and its successful integration into a computer-aided design system. Subtopics in this section include ventilation system concept, axial fan design, and efficient fan control techniques such as impeller speed control and innovative blade adjustment techniques. An important step is the design of the blades of an energy efficient axial fan, including the influence of the shape of the blade axis on the economical operation of the fan, the selection of the blade profile and the creation of the final 3D model using Solid Edge software. Next, an aerodynamic calculation of the developed fan is carried out, including splitting into a finite element mesh, setting the air flow conditions and calculating the flow rate, followed by analysis of the results. The final task of the work are devoted to assessing the performance and estimating the cost of an energy-efficient axial fan. Evaluating performance includes improving the design, using innovative control technologies and selecting the optimal material. The study ends with the calculation of the payback period, providing an integrated approach to development and a comprehensive assessment of the performance of this important component of the data center ventilation system.Tétel Szabadon hozzáférhető Effectiveness of CBM and Industry 4.0 TechnologiesSharma, Abhimanyu; Menyhárt, József; DE--Műszaki KarThis thesis investigates the effectiveness of Condition-Based Maintenance (CBM) and Industry 4.0 technologies in a manufacturing environment. CBM is a proactive maintenance strategy that uses real-time data and predictive analytics to optimize equipment performance and reduce downtime. The study focuses on the integration of advanced technologies such as IoT, big data analytics, and digital twins to enhance maintenance practices. Through a detailed case study of RAMAH Motors, the thesis demonstrates significant improvements in operational efficiency, cost savings, and equipment reliability. It concludes with recommendations for further implementation and optimization of CBM in the automotive industry.
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