Index Catalog // ScholarsArchive@OSU

A Study of Oscillating Water Column Wave Energy Converters Array Configurations Based on Simulation

Creator:: Ding, Siyuan
Abstract:: Wave energy is a potentially important renewable clean source of energy that can help solve the energy demand throughout the world. A great deal of research has been conducted in the last few decades and it is now reaching the point of full implementation. In order to compete with other...
Resource Type:: Capstone Project

Charging Analysis of Ground Support Vehicles in an Electrified Airport

Creator:: Gulan, Kyle S.
Abstract:: While electrification is currently one of the largest trends in the automotive world, other related industries are also evaluating electrification opportunities as a means to reduce environmental impact, emissions, and noise pollution. One such sector is the aviation industry. While it is generally accepted that all-electric aircraft are not a...
Resource Type:: Masters Thesis

Experimental Validation of the Hydrodynamic Coefficients for an Oscillating Water Column Wave Energy Converter

Creator:: Bentivoglio, Marine M. J.
Abstract:: Resulting from the action of wind over open water surfaces, water waves contain colossal amounts of energy that has not yet been harnessed. Seen as a very promising source for renewable energy generation, many studies have tried to make wave energy a cost competitive source by investigating optimal designs of...
Resource Type:: Masters Thesis

Analysis of Learning Schemes for Power Systems Secure Control

Creator:: Lassetter, Carter
Abstract:: As the future electrical power systems tend towards smarter and greener technology, thedeployment of self-sufficient networks, or microgrids, becomes more likely. Microgridsmay operate on their own or synchronized with the main grid, thus control methodsneed to take into account islanding and reconnecting said networks. Isolation of subnetworks may be necessary...
Resource Type:: Masters Thesis

High torque density cycloid electrical machine for robotic application

Creator:: Liu, Rui
Abstract:: This thesis investigates a novel cycloid electric machine that integrates both cycloid gear drive and permanent magnet synchronous machine (PMSM), and proposes to apply the machine in robotic transmission system. Cycloid gear drive is a transmission device that is commonly used to boost up the output torque. It has been...
Resource Type:: Masters Thesis

Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska

Creator:: Cicilio, Phylicia
Abstract:: Dynamic modeling is key to the successful operation and reliability of electrical grids by evaluating transient stability. Developing dynamic load models and identifying where they are necessary is a challenging task as loads are an aggregation of individual devices that change throughout the year. This thesis investigates how to develop...
Resource Type:: Masters Thesis

GPU-Based Fluid-Structure Interaction using Immersed Boundary Methods

Creator:: Minar, Christopher
Abstract:: Engineering applications often require fast, accurate solutions of fluid flow around freely moving bodies. The massive parallelism enabled by graphics processing unit (GPU) architecture enables high performance, offering a promising alternative to traditional solver acceleration via multicore central processing units (CPU). However, fully harnessing GPU parallelism requires specialized algorithms and...
Resource Type:: Masters Thesis

Wave-by-Wave Forecasting via Assimilation of Marine Radar Data

Creator:: Simpson, Alexandra Joyce
Abstract:: A wave-by-wave forecasting system is desired for optimization of wave energy conversion devices and for improving safety of vessel-based marine operations. This study outlines the first validation attempts of a recently developed forecasting system called Wavecast. The forecasting approach uses X-Band marine radar images for data assimilation, then reconstructs and...
Resource Type:: Masters Thesis

Lasers in the Sky : Distributed Temperature Sensing and a Micro-Meteorological Approach to Quantifying Evapotranspiration

Creator:: Predosa, Robert
Abstract:: Lower atmospheric flux measurements are a difficult subset of atmospheric data to accurately collect. The interplay of cost, precision, specialty, resolution and repeatability compound an already difficult experimental problem. In response to this, a new, novel instrumentation approach to measuring within the atmospheric boundary layer (ABL) is introduced. The combination...
Resource Type:: Masters Thesis

Electric Machine Capability Characterization for Actuators in Disaster Response Robots

Creator:: Li, Qianyun
Abstract:: Disaster response robots need to be simultaneously able to survive extreme environment and complete the mission efficiently and robustly. One of the determinants is the performance of the actuators in each joint, which drive the robot to the desired motion accurately. In robotics society, people usually build their robots directly...
Resource Type:: Masters Thesis

Nanostructured Optical Devices for Biosensing Applications

Creator:: Chalishazar, Vishvas
Abstract:: We demonstrated a sensitive biosensor based on plasmonic metal composite nanostructures. The device can be fabricated and duplicated with ease using a novel nanoprinting technology which allows precise transfer of metal nanostructures without complicated lithography processes. The design featured by its unique material composition and sub-wavelength structures maximizes the exposure...
Resource Type:: Masters Thesis

Automated Synthesis of Hybrid Energy Network Optimization using A* & Ensemble Forecasting

Creator:: Luc, Jonathan H.
Abstract:: This thesis describes a method for automatically generating and evaluating small-scale off-grid energy systems. Such systems are comprised of components such as solar panels, residential-scale wind turbines, batteries, inverters and charge controllers. These disparate components are assembled into feasible networks through the use of topological optimization and graph grammar rules....
Resource Type:: Masters Thesis

Exploring the Relationship between Bicycle Level of Traffic Stress and Reported Bicycle Collisions

Creator:: Vogt, Rachel
Abstract:: Transportation agencies need efficient methods to determine how to improve bicycle facilities in order to improve connectivity and safety. Many studies have used standalone methods such as level of traffic stress (LTS) and bicycle level of service (BLOS) to better understand bicycle mode share and network connectivity for a region...
Resource Type:: Masters Thesis

Low Frequency Oscillation Reduction Algorithm for Six-step Operation of Three-Phase Inverters

Creator:: Ke, Ziwei
Abstract:: A power inverter, or inverter, is an electronic device or circuitry that converts direct currents (DC) to alternating currents (AC) in the power electronics family. A three-phase inverter converts DC current to three-phase AC current. Inverters, especially three-phase inverters, have been widely used in many fields including renewable energy applications...
Resource Type:: Masters Thesis

Toward Automated Decision-Making in Power Systems Wide-Area Protection

Creator:: Meier, Richard John
Abstract:: In recent years there have been many improvements in the reliability of critical infrastructure systems. Despite these improvements and despite targeted efforts to improve the operation and control of the electric grid, the power systems industry has seen relatively small advances in this regard. For instance, today's power system is...
Resource Type:: Masters Thesis

Bitmap Indexing : Energy Applications and Improvements

Creator:: McCamish, Benjamin
Abstract:: Large databases and data warehouses are becoming prevalent for the storage and management of energy data. Accelerating the rates at which data can be retrieved is beneficial not only to allow for more efficient search of the data, but also to be integrated with other energy system tools. In this...
Resource Type:: Masters Thesis

Vertical Axis Pendulum Wave Energy Converters : Investigating Control Strategies and the Deployment of a Scaled Generic Prototype

Creator:: Boren, Blake C.
Abstract:: Vertical Axis Pendulum Wave Energy Converters (VAPWECs) are thought to be both effective and robust at converting ocean wave energy into usable electricity. Seeking to build upon and investigate such potential, this work examines the merits of actively controlling a generic VAPWEC's pendulum for the purpose of increasing the converter's...
Resource Type:: Dissertation

Real-Time Estimation and Prediction of Wave Excitation Forces for Wave Energy Control Applications

Creator:: Ling, Bradley A.
Abstract:: Wave energy is emerging as a new potential source for renewable energy generation. However, wave energy technology is not currently cost competitive with other more mature renewable energy sources such as wind and solar. One approach that researchers and developers are taking to reduce the cost of wave energy is...
Resource Type:: Masters Thesis

A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus

Creator:: Huo, Chen
Abstract:: In the past two years, Oregon State University (OSU) Corvallis campus suffered several power outages. The estimated cost of one of those outages was close to a million dollars worth of equipment and impact on research projects. Meanwhile, the campus grid operates with severely aging power assets. The reliability of...
Resource Type:: Masters Thesis

Depth estimation and frontal imaging via X-band marine radar

Creator:: Honegger, David Andrew
Abstract:: This dissertation focuses on two core aspects of remote sensing: (a) interpretation of the remotely sensed data to identify and characterize sea surface features of interest, and (b) the quantitative analysis of previously characterized features to produce robust estimates of geophysical variables. Specifically, these aspects are addressed in the context...
Resource Type:: Dissertation

From running birds to walking robots : optimization as a unifying framework for dynamic bipedal locomotion

Creator:: Hubicki, Christian M.
Abstract:: Bipedal locomotion is a complex phenomenon to understand and control, making it difficult for legged robots to achieve the speed, agility, efficiency, and robustness of their animal counterparts. This thesis argues for the use of numerical optimization to investigate and implement bipedal control as it applies to biology, dynamical models,...
Resource Type:: Dissertation

Dynamics and control for spring-mass legged robots

Creator:: Vejdani Noghreiyan, Hamid Reza
Abstract:: The objective of this study is to propose control strategies for legged robots to walk and run naturally like humans and animals. To achieve this goal, we use the spring-mass model for the legged robots to be able to create the same dynamics in the leg as humans and animals....
Resource Type:: Dissertation

Grid emulator for wave energy converter testing

Creator:: Biligiri, Kaushal Kestur
Abstract:: Power generation has been an ever growing exigency since the invention of electric power. The world is gradually inching away from conventional generation toward renewable generation. Advancements in renewable energy generation have been at a steady positive pace over the past few decades with different resources developing to be feasible...
Resource Type:: Masters Thesis

Equivalent circuit modeling of on-chip magnetic devices based on terminal measurements

Creator:: Gaskill, Steven G.
Abstract:: The addition of thin-film alloy magnetic materials to integrated circuit processing enables a number of novel monolithic circuits. Examples include fully integrated magnetic field sensors, signal and power galvanic isolation circuits, and power supplies on chip (PwrSoC). There are several benefits to integrating these traditionally off-chip devices, including improved manufacturability,...
Resource Type:: Dissertation

Design of composite sandwich panels for a Formula SAE monocoque chassis

Creator:: Story, Robert D.
Abstract:: Physical testing of composite sandwich panels in three point bending is an increasingly important aspect of qualifying a composite monocoque for Formula SAE competition. Required stiffness and strength values have increased over the past three years, and more of the monocoque's laminates must be tested as well. As a result,...
Resource Type:: Masters Thesis

A remotely operated, autonomous wave energy converter system

Creator:: Lewis, Timothy M.
Abstract:: The potential for electric energy generation from ocean waves is substantial and much research is being conducted on the conversion process as a renewable, grid-connected, power source. Some of the same attributes that make wave energy harvesting attractive as a grid-connected source also make it attractive as a remote, or...
Resource Type:: Dissertation

ATRIAS 1.0 & 2.1 : enabling agile biped locomotion with a template-driven approach to robot design

Creator:: Grimes, Jesse A.
Abstract:: Practical bipedal robots need to be simultaneously efficient, robust, and versatile machines, but designing robots dynamically capable of these demands has been a significant bottleneck. We designed ATRIAS to be a highly dynamic biped capable of both walking and running untethered in real environments. To meet these goals, ATRIAS is...
Resource Type:: Masters Thesis

Atomic solid state energy scale applied to novel thin-film solar absorbers

Creator:: Pelatt, Brian D.
Abstract:: The atomic solid state energy (SSE) scale is introduced as a tool for inorganic materials design. The SSE scale is obtained by assessing an average electron affinity (EA) (for a cation) or an average ionization potential (IP) (for an anion) for each atom using data from compounds having that specific...
Resource Type:: Dissertation

Modeling, simulation, and analysis of two hydraulic power take-off systems for wave energy conversion

Creator:: Casey, Sean (Sean Michael)
Abstract:: Hydraulic power take-off (PTO) systems have been implemented in several wave energy converter (WEC) designs in recent years. Two popular hydraulic PTO configurations coupled to a point absorber hydrodynamic model are simulated in waves representative of an energetic sea state likely to be found in deep waters off the coast...
Resource Type:: Masters Thesis

Rapid bidirectional power flow of supercapacitor bank energy storage through grid-tied inverters for improved renewables integration

Creator:: Bostrom, Arne
Abstract:: The variable output of renewables such as wind and solar causes fluctuations of power flow that can adversely affect power system operation, especially at high levels of penetration. The coordination of multiple energy storage solutions can mitigate integration challenges by providing a buffer from variable renewables. This thesis presents the...
Resource Type:: Masters Thesis

Control of spring-mass running robots

Creator:: Vejdani Noghreiyan, Hamid Reza
Abstract:: We seek the control strategies that are applicable on legged robots and control them to run in real world as robust and efficient as animals. To achieve this goal, we need to understand the principles of legged locomotion and the control policies that animals use during running. In this study...
Resource Type:: Masters Thesis

Wave field patterns generated by wave energy converters

Creator:: McNatt, J. Cameron
Abstract:: The eventual deployment of wave energy converters (WECs) on a commercial scale will necessitate the grouping of devices into arrays or "wave farms," in order to minimize overhead costs of mooring, maintenance, installation, and electrical cabling for shoreward power delivery. Closely spaced WECs will interact hydrodynamically through diffracted and radiated...
Resource Type:: Masters Thesis

Target-based coverage extension of 802.11 MANETs via constrained UAV mobility

Creator:: Johnson, Taylor N.
Abstract:: MANETs are known to be useful in situations where mobile nodes need to communicate and coordinate in dynamic environments with no access to fixed network infrastructure. However, connectivity problems can occur when sub-groups within a MANET move out of communication range from one another. The increasingly prolific use of UAVs...
Resource Type:: Masters Thesis

Digitally assisted control techniques for high performance switching DC-DC converters

Creator:: Khan, Qadeer Ahmad
Abstract:: Digitally controlled switching DC-DC converters have recently emerged as an attractive alternative to conventional switching converters based on analog control techniques. This research focuses on eliminating the issues associated with the state of the art switching converters by proposing three novel control techniques: (1) a digitally controlled Buck-Boost converter uses...
Resource Type:: Dissertation

A risk-informed decision making framework accounting for early-phase conceptual design of complex systems

Creator:: Van Bossuyt, Douglas L.
Abstract:: A gap exists in the methods used in industry and available in academia that prevents customers and engineers from having a voice when considering engineering risk appetite in the dynamic shaping of early-phase conceptual design trade study outcomes. Current methods used in Collaborative Design Centers either collect risk information after...
Resource Type:: Dissertation

Force and impulse control for spring-mass running

Creator:: Koepl, Devin N.
Abstract:: We present a novel control strategy for running which is robust to disturbances, and makes excellent use of passive dynamics for energy economy. The motivation for our control strategy is based on observations of animals, which are able to economically walk and run over varying terrain and ground dynamics. It...
Resource Type:: Masters Thesis

Modeling and experimental validation of supercapacitors for use in an in-lab grid developed for wind integration applications

Creator:: Naswali, Eunice
Abstract:: The fast growth of wind energy utilization has necessitated research into wind energy integration. Due to the variable nature of wind and the forecasting challenges, it is desirable to utilize wind energy alongside energy storage sources for reliable wind energy integration. This work details the design of a 25 kW...
Resource Type:: Masters Thesis

Time-domain modeling of heaving point absorber wave energy converters, including power take-off and mooring

Creator:: Ruehl, Kelley
Abstract:: Wave energy conversion is still in its infancy, and in order for it to become a commercially viable technology, developers, investors and utilities need to estimate a Wave Energy Converter's (WEC's) performance for the wave climate of a potential installation site. With the goal of estimating a design's power output...
Resource Type:: Masters Thesis

Micro in-lab grid integration of a wave energy converter

Creator:: Okuda, Jeremy S.
Abstract:: Ocean wave energy has great potential to develop into a strong and reliable form of renewable energy. As the technology develops, more wave energy converters will be grid interconnected and the variable nature of the ocean will begin to influence the stability of the electrical grid system. There are many...
Resource Type:: Masters Thesis

Development of a guideline for estimating tsunami forces on bridge superstructures

Creator:: Boon-intra, Sutaporn
Abstract:: Infrastructures along the Oregon Coast are vulnerable to seismic events in the Cascadia Subduction Zone that could generate large tsunamis. Bridges along the coast are an important part of the transportation and lifeline system in the area. The major damages on these bridges due to earthquake and/or tsunami would result...
Resource Type:: Masters Thesis

Implementation and performance measurement and analysis of OLSR protocol

Creator:: Sinky, Hassan Hussein
Abstract:: This paper provides a measurement-based performance evaluation of the Optimized Link State Routing (OLSR) protocol. Two versions of OLSR, OLSR-ETX and OLSR-ETT, are implemented and evaluated on a mesh network that we built from off-the-shelf commercial components. OLSR-ETX uses the Expected Transmission Count (ETX) metric whereas, OLSR-ETT uses the Expected...
Resource Type:: Masters Thesis

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