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Articles 1 - 30 of 83
Full-Text Articles in Engineering
Design And Development Of Smart Wardrobe Technology, Mikhail Filatov
Design And Development Of Smart Wardrobe Technology, Mikhail Filatov
All Graduate Theses, Dissertations, and Other Capstone Projects
The increasing demand for online shopping in the 21st century is causing rapid growth in technology and methods in marketing and sales fields. Present thesis work scrutinizes the process of design and development of the device that simplifies the process of trying on and buying clothes in online retail stores, the development of which is based on the known basics of operational, mechanical, and electrical designs for computational systems, with account for ergonomics and manufacturing sustainability. The following research represents the market analysis for competition identification, description of all operational modes of the system, list of mechanical and electrical components …
The Analysis, Development And Calibration Of Prototype Hardware In Effort To Improve Brake Thermal Efficiency And Real-World Fuel Economy Of The International Supertruck, Matthew Taylor
All Graduate Theses, Dissertations, and Other Capstone Projects
The work performed for this project was in part of the effort of the Department of Energy Sponsored program called ‘SuperTruck’. The entirety of the Supertruck program encompasses total vehicle re-design to achieve 80% freight efficiency improvement (over the 2009MY baseline production vehicle). However, the other main goal for the program is to achieve 50% engine brake thermal efficiency. The work outlined in this document describes the efforts performed on base engine and thus mainly contributing towards 50% BTE. Though ultimately reducing BSFC by increasing BTE contributes to both outcomes. The engine development data discussed in this paper was collected …
Studying And Troubleshooting Lubricity Test On Pressure Wire X Proximal And Distal Coatings, Usama A. Khan
Studying And Troubleshooting Lubricity Test On Pressure Wire X Proximal And Distal Coatings, Usama A. Khan
All Graduate Theses, Dissertations, and Other Capstone Projects
Coatings of guidewires used in medical device manufacturing industry are one of the most important element aspects. It defines its efficiency to penetrate through tightest of canals and curves. Guidewires are put through controlled environment to accelerate its age and tested for its mechanical features. Pressure Wire X failed the lubricity testing after being tested by multiple operators and at alternate sites. A cause-and-effect diagram shows all potential causes of test failure. The human factor involved in the test failure was investigated through multiple Gage R&R and training records. Calibration error with the lubricity tester DL1000 was identified and solved …
Developing A Standardized Gis Model Capable Of Identifying Areas To Implement Wind Power Generation Infrastructure, Namidu Vishwanath De Silva
Developing A Standardized Gis Model Capable Of Identifying Areas To Implement Wind Power Generation Infrastructure, Namidu Vishwanath De Silva
All Graduate Theses, Dissertations, and Other Capstone Projects
This project involves the use of multi-source GIS data, suitability analysis, and spatial modeling techniques to identify the most suitable areas for improving renewable energy infrastructures, primarily focusing on wind energy, within a given region. Previous literature conducted on the subject matter shows research being done in isolated areas or states. The primary objective of this project is to develop a GIS model and scripting tool that has the capability to test any input region to find the most suitable area within the given region that would be ideal for implementing new wind power infrastructure. The success rate of the …
Effect Of Decorating Super Paramagnetic Iron Oxide Nanoparticles With Silver Nanoparticles On Their Magneto-Photo Thermal Heating Efficiency, Anthony Joseph Afful
Effect Of Decorating Super Paramagnetic Iron Oxide Nanoparticles With Silver Nanoparticles On Their Magneto-Photo Thermal Heating Efficiency, Anthony Joseph Afful
All Graduate Theses, Dissertations, and Other Capstone Projects
Cancer treatment is rather dangerous to the body, often involving many secondary effects, including nausea, hair loss, and weight fluctuations. The search for non-invasive, highly efficient, and targetable treatments ameliorates these issues. Super paramagnetic iron oxide nanoparticles (SPIONS) have been used for other medical purposes such as magnetic resonance imaging contrast agent and is being extensively studied as a potential candidate for many cancer therapeutic and diagnostic approaches due to its biocompatibility and superior magnetic properties. When subjected to an external alternating magnetic field SPIONS generate heat mainly due to the friction of the SPIONS against the fluid it is …
Impacts Of Ergonomic Conditions On Quality And Cycle Time In Automotive Shock Absorber Assembly, Val Urman
Impacts Of Ergonomic Conditions On Quality And Cycle Time In Automotive Shock Absorber Assembly, Val Urman
All Graduate Theses, Dissertations, and Other Capstone Projects
Earlier studies have demonstrated relationships between general ergonomic conditions in assembly and quality defects or cycle time. This study investigated the impacts of specific ergonomic conditions on the quality and cycle time of shock absorber assembly. Ergonomic conditions within a single manual assembly cell were controlled through three factors: assembly height, reachability, and standing surface. Experiments were conducted with varied workstation conditions to determine the impact on the time of assembly and multiple quality metrics. Reachability and standing surface affected the quality of the assembly. Additionally, cycle time of the assembly was impacted by reachability of the components.
Machine-Learning Based Model Predictive Control For A Three-Phase Inverter, Arturo De La Cruz
Machine-Learning Based Model Predictive Control For A Three-Phase Inverter, Arturo De La Cruz
All Graduate Theses, Dissertations, and Other Capstone Projects
In recent years, the study of three-phase inverter controls has become important with the rising use of renewable energy sources (RES) in the form of distribution generation (DG). Many control types have been developed for DG inverters and others were traditional controls for the generation of the main grid power that were adapted for a system with less inertia. Among these controls is the model predictive control (MPC) which allows for a fast transient response and good reference tracking. One disadvantage of the MPC is that it does this prediction and optimization online which can limit the applications due to …
Thermal Testing And Simulation Of Lunar And Martian Isru-Based Materials, Andres Campbell
Thermal Testing And Simulation Of Lunar And Martian Isru-Based Materials, Andres Campbell
All Undergraduate Theses and Capstone Projects
Upon the eventual return of humans to the lunar surface, leveraging local resources to construct landing pads and other infrastructure is an essential component to minimize cost and risk. The inability to accurately model landing and launch scenarios to predict damage to lunar structures poses risks to astronaut and equipment safety. The following experiment is an investigation of using simulation software and temperature sensors to model lunar and Martian regolith simulant-based concrete exposed to thermal loads. The basis of this experiment is built upon standards defined by the American Society for Testing and Materials, the fundamental axioms of structural health …
Supervised Machine Learning Techniques Applied To Low-Cost Air Quality Sensor Suites, Peter Wahman
Supervised Machine Learning Techniques Applied To Low-Cost Air Quality Sensor Suites, Peter Wahman
All Undergraduate Theses and Capstone Projects
Low-cost PM sensors have garnered interest for their ability to reduce the cost of investigating PM concentrations in both indoor and outdoor spaces. They perform well in high concentration lab testing with correlation coefficients greater than 0.9. In real-world applications, the correlation coefficients drop significantly because of sensing floors and adverse ambient conditions. There are plenty of supervised machine learning techniques that aim to correct the measurements ranging from linear regression to more advanced neural networks and random forests. This work aims to use those more complicated techniques to adjust the measurements using other data sets gathered by a sensor …
Power Decoupling Control And Optimization For A Photovoltaic Inverter In D-Q Rotation Frame, Zhaoxia Yang
Power Decoupling Control And Optimization For A Photovoltaic Inverter In D-Q Rotation Frame, Zhaoxia Yang
All Graduate Theses, Dissertations, and Other Capstone Projects
In the past decade, solar energy, the fastest growing renewable energy, has been a growing interest in integration to the utility grid. Power electronics converters play important role in renewable energy integration, e.g., integrate the distributed photovoltaic (PV) panels to the grid. In many applications, particularly in the residential area, a single-phase rather than three-phase inverter is used to regulate the voltage from one form to the other while tracking the maximum power point of the PV system. The input voltage and current are DC and its maximum power is desired to be a constant value. However, in the single-phase …
Improved Warehouse For Smt Material Management Using Modern Technology Retrieval System And Better Traceability, Ferdinand Mabeya
Improved Warehouse For Smt Material Management Using Modern Technology Retrieval System And Better Traceability, Ferdinand Mabeya
All Graduate Theses, Dissertations, and Other Capstone Projects
Warehouse plays a vital role in the manufacturing and distributing goods from raw material to manufacturer and finally to the end-user. Optimizing warehouse material management will make an impact on productivity, quality, and on-time delivery. My thesis focuses on material management of surface mount (SMT) from suppliers, receiving and inspection, and warehouse to maximize efficiency. With SMT line costing over 2 million, the warehouse material management is improved. Things like cycle count and picking material are much faster. It makes the overall equipment efficiency (OEE) very low. To make this material management process possible, manufacturers must embrace Six Sigma and …
Fundamental Factors For Success: Engineering Faculty And Industry Partners, Molly F. Schaefer
Fundamental Factors For Success: Engineering Faculty And Industry Partners, Molly F. Schaefer
All Graduate Theses, Dissertations, and Other Capstone Projects
Partnerships and collaborations between higher education and industry have a long history in the United States. Numerous partnerships have contributed to advancements in the economy, education and training, humanity, and innovation. The subject areas of science, engineering, and technology are fields in which many of the collaborations occur, and many of the partnerships are often initiated and led by a faculty and a member of industry. Yet, it remains unclear how academia and industry achieve successful partnerships when the goals, language, culture, and organizational structures significantly differ from one organization to another. This study examined whether partnerships among engineering faculty …
Implementation And Usage Of Low-Cost Turbines For Power Generation In Water Networks, Luis Javier Ortiz Osornio
Implementation And Usage Of Low-Cost Turbines For Power Generation In Water Networks, Luis Javier Ortiz Osornio
All Graduate Theses, Dissertations, and Other Capstone Projects
The following APP is part of an investigation and development, carried out to design, and implement a hydroelectric turbine of horizontal axis, in order to generate electrical energy in rural areas, utilizing existing infrastructure or natural waterways such as irrigation canals, piping, rivers and streams. Every industrialized country, as well as, most of the developing nations, have a stake in agriculture and thus access to the infrastructure required for irrigation purposes. Artificial irrigation canals offer advantages such as a clean continuous flow, with the possibility of flow regulation: this together with their vast availability as agricultural infrastructure constitute the main …
Pathways Towards An Engineering Baccalaureate Degree - Critical Incidents And Factors Leading Students To Choose Community College: A Phenomenological Study, Joan Zitur Carter
Pathways Towards An Engineering Baccalaureate Degree - Critical Incidents And Factors Leading Students To Choose Community College: A Phenomenological Study, Joan Zitur Carter
All Graduate Theses, Dissertations, and Other Capstone Projects
Women and underrepresented minorities can help fill the ever-growing demand for engineers in the United States. Quality teaching methods, an understanding of the cognitive aspects of learning, and faculty addressing biases help ensure student success in engineering majors. Accordingly, the community college engineering pathway can help fill the national need for engineers. This phenomenological study sought to describe the experience of students who choose the community college pathway toward a Bachelor of Science degree in Engineering. Thirteen participants were interviewed; all took engineering courses at the same community college, transferred to a four-year engineering university (10 to a R1), and …
Optimal Speed Control Of Electric Vehicles In Traffic With Wireless Charging, Amina Jemi
Optimal Speed Control Of Electric Vehicles In Traffic With Wireless Charging, Amina Jemi
All Graduate Theses, Dissertations, and Other Capstone Projects
With the increase in electric vehicle use in recent years and expected increase in the future, a wireless network provides a possible option to allow vehicles with a route while maintaining an approximate net-zero energy balance under certain scenarios. In this type of network, a collection of wireless charging pads is installed under the road, and energy transfer occurs, while a vehicle with wireless charging capability is driven over the charging pads. This thesis describes a methodology and modeling to solve an optimization problem involving a speed-controlled vehicle in traffic. The methodology incorporates a receding horizon dynamic model with constraints. …
Printed Circuit Board Defect Detection Using Image Processing, Nandeera Kamalaja De Silva Munaweera Tanthirige
Printed Circuit Board Defect Detection Using Image Processing, Nandeera Kamalaja De Silva Munaweera Tanthirige
All Graduate Theses, Dissertations, and Other Capstone Projects
This study was conducted to verify the hypothesis of the possibility to design an Automated Defect Detection system at a budget using image processing software. Focusing mainly on simplicity of integration with the capability to inspect a high variation of PCB with less user input. Reference comparison method was utilized to construct the defect detection algorithm where a defect free reference PCB gets compared with an inspection image to identify defects and anomalies. The paper discusses the range of possible defects for inspection on non-assembled PCBs, suggests methods for image processing and presents a final inspection algorithm, including their testing. …
Precision Machining Of Polymer Matrix Composites, Victor Martinez Polanco
Precision Machining Of Polymer Matrix Composites, Victor Martinez Polanco
All Graduate Theses, Dissertations, and Other Capstone Projects
This experiment was started to figure how the precision machining of polymer matrix composites differ from metals such as aluminum and steel. Polymer matrix composites are highly used in powered vehicles for their strength and light weight properties, but they are typically not machined to their final product how metals are. Polymer matrix composites are typically manufactured near their final shape, with some trimming involved to complete its shape. This research machined carbon fiber manufactured through a wet layup and through resin infusion, as well as aluminum and steel to compare their machineability and their surface finish. These materials were …
A Soft-Switched Three-Port Dc-Dc Converter For A Pv/ Battery System, Mohamedelfatih Dosa
A Soft-Switched Three-Port Dc-Dc Converter For A Pv/ Battery System, Mohamedelfatih Dosa
All Graduate Theses, Dissertations, and Other Capstone Projects
This thesis proposed a soft-switched three-port bidirectional DC-DC converter for managing the power flow of a photovoltaic (PV) and battery system. The proposed converter consists of three ports connected to a PV panel, battery, and load. These three ports are interfaced through the high-frequency transformer and use phase-shift control to achieve soft-switching for all converter switches. Compared with the traditional multiport converters, the proposed three-port converter uses the least number of power switches, and zero-voltage switching (ZVS). Simulation and experimental results validate the design and effectiveness of soft switching and power flow control. The converter can work in different scenarios …
Design, Fabrication, And Testing Of A High-Speed, Low-Cost Atomic Force Microscope Housing And Distance Measurement System, Jonathan Menke
Design, Fabrication, And Testing Of A High-Speed, Low-Cost Atomic Force Microscope Housing And Distance Measurement System, Jonathan Menke
All Undergraduate Theses and Capstone Projects
Advances to the state-of-the-art in fields like biology and material science often stand on the foundation of improved imaging. Here a low-cost Atomic Force Microscope (AFM) housing and distance measurement system was designed, fabricated, and tested. The instrument was developed around an Optical Pickup Unit (OPU) and designed for use as part of a high-speed AFM system. A structure to align the OPU with the probe holder was designed to ensure the beam of the OPU is positioned above the probe in addition to accommodating space, manufacturability, and cost constraints by using cost effective components. The designs were fabricated and …
Analysis Of Three-Phase Rectifier Via Three Different Control Methods And Switch Power Loss Comparison, Yichao Wang
Analysis Of Three-Phase Rectifier Via Three Different Control Methods And Switch Power Loss Comparison, Yichao Wang
All Graduate Theses, Dissertations, and Other Capstone Projects
Traditional uncontrolled or phase-controlled rectifiers have the defects of lower power factor and nontrivial higher harmonics which causes the low efficiency of power, bad power quality, and so on. However, PWM rectifiers overcome the drawbacks mentioned above. They reduce the higher harmonics yielding better sinusoidal current on the grid side, achieve unity power factor and bidirectional power flow, and have better dynamic performance. So, it is favored more by academia and widely applied in high-performance power electronics devices. In this paper, the PWM rectifier is analyzed and a comparison of the switch loss on three-phase rectifier using three different control …
Implementation Of Model-Free Adaptive Power Flow Control For Dual-Active-Bridge-Based Ac-Dc Converters, Qinghang Shen
Implementation Of Model-Free Adaptive Power Flow Control For Dual-Active-Bridge-Based Ac-Dc Converters, Qinghang Shen
All Graduate Theses, Dissertations, and Other Capstone Projects
With the rising energy consumption and environment destruction problems worldwide, the development of renewable energy and energy recapture methods to improve the energy utilization rate has become more important as two of the most efficient processes to solve those problems. Bidirectional AC/DC converter and its modulation strategies are widely used as the essential part of implementing bidirectional power conversion between power grid and energy storage systems. To improve the efficiency and accuracy of the power conversion within AC/DC converters, a stable, robust power flow control system with quick response and disturbance rejection ability is desired. This thesis proposes a model-free …
A Four-Port Bidirectional Dc-Dc Converter For Renewable Energy System And Microgrid, Xia Du
A Four-Port Bidirectional Dc-Dc Converter For Renewable Energy System And Microgrid, Xia Du
All Graduate Theses, Dissertations, and Other Capstone Projects
Renewable energy has nowadays become important in electrical power applications. Power converters play an important role in integrating these distributed energy sources. However, due to their intermittence characteristics, e.g., the output power provided by the PV and wind turbine is not stable, either an energy storage system will be used or microgrid is formed between the main grid and the sources. To integrate these renewable energy sources and manage the power flow, a multiport converter is preferred because it is highly beneficial and cost-efficiently than the traditional solution that using multiple individual power converter for each source. This thesis proposed …
Experimental Studies Of Interfacial Behavior Of Contact System During Liquid Mediated Rough Surfaces Separation, Nhat Le
All Graduate Theses, Dissertations, and Other Capstone Projects
In the applications related to liquid-solid interface, their operation could be affected by the properties of the interface especially the applications that have infinitesimal interaction force at the interface surface and high interaction velocity. This study provides real time dynamic force measurement in separation process along with the real time image acquisition to explain the deviation between theoretical and experimental methods. The experimental design, setup and initial conditions for experiment are described in detail for further study related to liquid separating force. The simulation model is created to apply the theoretical model in prediction of meniscus force for different initial …
Control Of A Grid-Tied Single-Phase Inverter For Renewable Energy Integration, Dianzhi Yu
Control Of A Grid-Tied Single-Phase Inverter For Renewable Energy Integration, Dianzhi Yu
All Graduate Theses, Dissertations, and Other Capstone Projects
With increasing demand for generating electricity from clean energy, renewable energy sources (RESs), such as wind and solar, has gained much attention due to the clean and quiet characteristics. In many applications, connecting multiple RESs of different types (e.g., wind and solar), voltages, and capacities to a power grid or load is required. Single- phase inverters have been widely installed in residential power system to meet the full or partial load demand. In this work, multiport converters were developed for integrating multiple RESs, wind turbine and photovoltaic (PV) panel. Since the intermittent characteristic of the RESs, an energy storage device, …
Fault Detection And Classification Of A Single Phase Inverter Using Artificial Neural Networks, Ayomikun Samuel Orukotan
Fault Detection And Classification Of A Single Phase Inverter Using Artificial Neural Networks, Ayomikun Samuel Orukotan
All Graduate Theses, Dissertations, and Other Capstone Projects
The detection of switching faults of power converters or the Circuit Under Test (CUT) is real-time important for safe and efficient usage. The CUT is a single-phase inverter. This thesis presents two unique methods that rely on backpropagation principles to solve classification problems with a two-layer network. These mathematical algorithms or proposed networks are able to diagnose single, double, triple, and multiple switching faults over different iterations representing range of frequencies. First, the fault detection and classification problems are formulated as neural network-based classification problems and the neural network design process is clearly described. Then, neural networks are trained over …
Indoor Navigation For Visually Impaired Person Using Inertial And Geomagnetic Information, Jayanth Ammanabrolu
Indoor Navigation For Visually Impaired Person Using Inertial And Geomagnetic Information, Jayanth Ammanabrolu
All Graduate Theses, Dissertations, and Other Capstone Projects
Motivated by the need for assistance of indoor guidance for visually impaired persons (VIPs), a sensing system using inertial and geo-magnetic information has been developed to navigate a VIP person indoor. Orientation estimation, which is critical for indoor localization, is conducted using the information of the angular velocity, acceleration and geomagnetic field. By analyzing the characters of human gait, a method to eliminate the accumulated drift introduced by double integrations is introduced. By attaching the inertial sensor to the foot, the periodic stationary state will facilitate the drift correction. Also, the distinctive distortion of the geomagnetic field, which contains spatial …
A Four-Port Dc-Dc Converter For A Hybrid Wind/Solar Energy System, Jiahong Ning
A Four-Port Dc-Dc Converter For A Hybrid Wind/Solar Energy System, Jiahong Ning
All Graduate Theses, Dissertations, and Other Capstone Projects
With the increasing demand for clean and hybrid energy in the last decades, more and more attentions are paid to the renewable energy, e.g., wind and solar energy. According to the International Energy Agency, solar power was growing-fastest source in the world. In a hybrid wind/solar system, power converters play an important role in in power management and the voltage regulation. Gradually, power systems have undergone a paradigm shift from centralized generation to distributed generation. Smart grid, which is a combination of power systems and communication networks, was proposed to allow power systems to fit the future system challenge. However, …
Virtual Impedance Based Decentralized Control For A Microgrid System, Ramkrishna Mishan
Virtual Impedance Based Decentralized Control For A Microgrid System, Ramkrishna Mishan
All Graduate Theses, Dissertations, and Other Capstone Projects
As greenhouse gases produced from the conventional power plant causes global climate change, using renewable energy sources (RESs) in the future power system is inevitable. To minimize greenhouse gases emission, the interest in renewable grid or micro-grid is growing nowadays. In the microgrid, especially in AC microgrids, converters play an important role in many areas, including microgrid integration, uninterrupted power supply, and flexible alternating current transmission systems. Inverter plays an essential role in grid integration because it serves the interface between the energy source and the power grid. The important aspect of the inverter is control. This thesis studies several …
Binder Saturation, Layer Thickness, Drying Time And Their Effects On Dimensional Tolerance And Density Of Cobalt Chrome - Tricalcium Phosphate Biocomposite, John Ruprecht
All Graduate Theses, Dissertations, and Other Capstone Projects
Traditional metals such as stainless steel, titanium and cobalt chrome are used in biomedical applications (implants, scaffolds, etc.) but suffer from issues such as osseointegration and compatibility with existing bone. One way to improve traditional biomaterials is to incorporate ceramics with these metals so that their mechanical properties can be similar to cortical bones. Tricalcium phosphate is such a ceramic with properties such that it can be used in the human body. This research explores the use of the Binder Jetting based additive manufacturing process to create a novel biocomposite made of cobalt chrome and tricalcium phosphate. Experiments were conducted …
Development Of A Sensing System For Underground Optic Fiber Cable Conduit Mapping, Sherif Bakr
Development Of A Sensing System For Underground Optic Fiber Cable Conduit Mapping, Sherif Bakr
All Graduate Theses, Dissertations, and Other Capstone Projects
The motivation of this research is to obtain an accurate three-dimensional (3D) layout of an underground conduit, which may be beneficial to optic fiber cable installers and engineers. A newly designed algorithm for 3D position tracking with the help of an inertial sensor and an encoder has been developed. Two types of representations (Euler angle and Quaternion) for orientation and rotation are also introduced, followed by several data pre-processing procedures. A sensing fusion method is utilized to overcome the accumulated errors introduced by the sensor drifting. Considering the application of 3D underground duct mapping in this research, a sensing system …