Index Catalog // ScholarsArchive@OSU

Lift Enhancement of Pliant Wings Through Bio-Mimicry

Creator:: Osterberg, Nathaniel Brent
Abstract:: Flexible aerodynamic surfaces have been shown to favorably influence flight characteristics at low Reynolds numbers by increasing lift, angle of attack at stall, and resistance to perturbation. The objective of the research presented within this thesis is to investigate the influence of two aspects of flight observed in biological flyers,...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Nathaniel Brent Osterberg for

Design and construction of a small electric service vehicle

Creator:: Holt, Steven Charles
Abstract:: In an effort to fill an existing need two small electric service vehicles were designed, constructed, and tested. The first acted as a feasibility study and the second as a design prototype. The vehicles had low cost and the capability of being fabricated by their users as two main design...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF STEVEN CHARLES MOLT for the MASTER OF SCIENCE (Name) (Degree) in

Kinematics of arthropod legs : modeling and measurement

Creator:: Albright, Stephen L.
Abstract:: This thesis presents a method for determining the kinematic geometry of arthropod legs. A kinematic description makes possible the analysis of arthropod leg motion, as a prelude to investigating how various arthropod species are able to negotiate diverse terrains. Such knowledge will aid in design of legged vehicles. The focus...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Stephen L. Albright for the degree of Doctor of Philosophy in

The development of analytic techniques and FORTRAN programs for the evaluation of plane motion mechanisms

Creator:: O'Kins, Charles Eugene
Abstract:: A mechanism is a constrained kinematic chain composed of gears, links, cams, or the like. Mechanisms are the building blocks of all machines, and, as such, their evaluation is of considerable importance to the mechanical designer. Because the mathematical analyses of systems with four or more moving members has been...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Charles Eugene OtKins for the

Normal modes in nonlinear nonsymmetrical systems with two degrees of freedom, and applications to air springs

Creator:: Moustafa, Mahmoud Abd-Elfattah
Abstract:: The study of nonlinear vibrations of systems having two degrees of freedom has met considerable attention during the past few years. Nonlinear symmetrical systems have received most of it. Normal mode motion of a system is defined as a periodic motion such that the masses of the system assume repeated...
Resource Type:: Dissertation
Full Text:: Major Head of Departrnent of echanical Engineering presented l,tl. Atwood Dean of Graduate School

A model reference adaptive system for control of a flexible mechanical manipulator

Creator:: Lee, Byeung Kyun
Abstract:: For control of a flexible manipulator, the assumed- mode method is applied to the mathematical model of the model reference adaptive system. In the assumed-mode method, the flexible, continuous manipulator is described by a limited number of degrees of freedom. A modified model reference adaptive system is studied for direct...
Resource Type:: Dissertation
Full Text:: for Control of a Flexible Mechanical Manipulator Abstract approved: Redacted for privacy Charles E

Dynamic measurement of Timoshenko beam shear coefficient

Creator:: Nelson, Daniel Loren
Abstract:: The Timoshenko beam theory, as an engineering alternative to the elementary and exact theories, introduces a factor, k', called the shear coefficient which has been given various interpretations and values. It is the objective of this study to experimentally evaluate k' for a brass bar of rectangular cross-section. Analytical results...
Resource Type:: Masters Thesis
Full Text:: SHEAR COEFFICIENT Abstract approved: Charles E. Smith The Timoshenko beam theory, as an

Rebound predictions for elastic collisions

Creator:: Liu, Pao-pao
Abstract:: In this paper, a numerical method is used to predict the response of an elastic body during a collision in which both normal and tangential impulses are important. Results are compared with those from simplified prediction procedures, which stem from the assumptions that the energy-returning capacity of the normal deformation...
Resource Type:: Dissertation
Full Text:: approved: Charles E. Smith In this paper, a numerical method is used to predict the response of an

Pure torsion of a slotted channel member

Creator:: Benedetti, Gerald Andrew
Resource Type:: Masters Thesis
Full Text:: Department for the use of their equipment. I especially wish to thank my major professor, Dr. Charles E

Derivation and automatic generation of Kane's dynamical equations for mechanical manipulators

Creator:: Nie, Tinglin
Abstract:: To design and precisely control a manipulator requires developing an efficient dynamic model of the system. The present work demonstrates how this can be accomplished by employing Kane's dynamical equations. First, a detailed manual derivation of the equations of motion for a particular robot is presented in such way that...
Resource Type:: Dissertation
Full Text:: first express my gratitude to Dr. Charles E. Smith, for serving as my major professor during this

An aeroelastic analysis of the Darrieus wind turbine

Creator:: Meyer, Edward Earnest
Abstract:: The stability of small oscillations of the troposkeinshaped blade used on Darrieus wind turbines is investigated. The blade is assumed to be attached to a perfectly rigid rotor shaft and spinning in still air. Linear equations of motion are derived which include the effects of in-plane, out-of-plane, and torsional stiffness,...
Resource Type:: Dissertation
Full Text:: approved: Redacted for privacy Charles E. Smith The stability of small oscillations of the troposkein

Dynamics and control of a rigid/flexible manipulator

Creator:: Yeh, Chun-tien
Abstract:: Control of high-speed, light-weight robotic manipulators is a challenge because of their special dynamic characteristics. In this work, a two-stage control algorithm for the position control of flexible manipulators is proposed. First, the more complex, flexible robot system is replaced by a simplified hypothetical rigid body system (HRRA) with off-line...
Resource Type:: Dissertation
Full Text:: . Redacted for Privacy Abstract approved: Charles E. Smith Control of high-speed, light-weight robotic

Design, construction and testing of torsiograph

Creator:: Hamann, David Eugene
Abstract:: The crankshaft of an internal combustion engine experiences torsional vibrations which become critical at certain running speeds and can cause overstressing in the crankshaft, leading to failure in some cases. The object of this study was to design, construct and test an instrument to measure these oscillations at one point...
Resource Type:: Masters Thesis
Full Text:: constant of crankshaft between equivalent inertias j and j + 1 L Length of crankshaft journal M Moment on

Parameters affecting mechanical collisions

Creator:: Aum, Ho Sung
Abstract:: Even though the elastic deformations that occur during the impact of colliding bodies may be small in comparison to their actual dimensions, they play an important role in mechanical collisions. During the time the bodies are in contact, elastic, friction, and inertia properties combine to produce a complex variation of...
Resource Type:: Dissertation
Full Text:: presented on May 13, 1992. Title: Parameters Affecting Mechanical Collisions Abstract approved: Charles E

Predicting rebound of planar elastic collisions

Creator:: Cruz-Conde Gret, Raphaël
Abstract:: Impact is a large and complex field. It embraces both structures as simple as a nail, and more complex systems, such as a car collision. A central feature of impact theory is finding the dependence between the velocities before and after impact. The transformation law of the velocities in an...
Resource Type:: Masters Thesis
Full Text:: approved: Charles E. Smith Impact is a large and complex field. It embraces both structures as simple

Simulating changing diameter distributions in a softwood sawmill

Creator:: Salichon, Maxence C.
Abstract:: Sawmills are very complex systems that involve many manufacturing processes. The variability of their raw material adds further to this complexity as each log has characteristics that determine its processing path. Therefore, computer simulation is a very useful technique for analyzing sawmill performance. This thesis describes a simulation computer model...
Resource Type:: Masters Thesis
Full Text:: , 2005. Title: Simulating Changing Diameter Distributions in a Softwood Sawmill. Charles Brunner Timo y

Rebound predictions of mechanical collisions

Creator:: Lai, Liang-Ju
Abstract:: Predictions of mechanical collisions between two bodies frequently cannot be completed by the impulse-momentum equation together with a complete description of the motion of the system at the initial contact. Additional account must be taken of the deformations and frictional interaction induced by the impulsive reaction force, where the bodies...
Resource Type:: Dissertation
Full Text:: : Charles E. Smith Predictions of mechanical collisions between two bodies frequently cannot be

Stability of some commercial lubricating oil addition agents in an internal combustion engine

Creator:: Robidart, Charles Martin
Abstract:: In the mid 1930's the Diesel engine, which formerly was used only as a large, low-speed machine, was developed into a smaller high-speed engine for use in trucks, busses, and tractors. Along with these changes in mechanical design came many problems, of which a major one was lubrication. Because ordinary...
Resource Type:: Masters Thesis
Full Text:: Agents in an Internal Combustion Engine -g AN ABSTRACT OF TUE THESIS 0F Charles Martin Hobidart

Modelling and flow measurement of shallow geothermal systems with downhole heat exchangers

Creator:: Miles, Charles Ray
Abstract:: The low temperature geothermal deposits in the Klamath Falls area are commonly used for heating buildings. The system often used to accomplish this consists of a heat exchanger that extends the full length of the casing within the well. This casing has slots cut in it to allow geothermal water...
Resource Type:: Masters Thesis
Full Text:: systems with downhole heat exchangers AN ABSTRACT OF THE THESIS OF CHARLES RAY MILES for the degree of

An apparatus for determining the ignition temperatures of organic substances

Creator:: Harrison, Charles William
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT 0F THE ThESIS 0F Charles William Harrison for

Determination of stresses in riveted lap joints by the photoelastic method

Creator:: Bailey, Charles Ogden
Resource Type:: Masters Thesis
Full Text:: photoelastic method DETERkINATION OF STRESSES IN RIVETED LAP JOINTS BY ThE PHOTOELASTIC !THOD CHARLES

Characteristics of a capillary air washer

Creator:: Robins, Charles Samuel
Resource Type:: Masters Thesis
Full Text:: CHARACTERISTICS OF A CAPILLARY AIR WASHER by CHARLES SAMUEL ROBINS A THESIS submitted to OREGON STATE

The effects of creep on the structure and mechanical properties of zirconium

Creator:: Mullen, Charles Robert
Resource Type:: Masters Thesis
Full Text:: by Charles Robert Mullen Jr. A THESIS submitted to OREGON STATE COLLEGE in partial

Application of electrical resistance strain gage to an elastic calibrating device

Creator:: Cehrs, Charles Harold
Resource Type:: Masters Thesis
Full Text:: DEVICE by CHARLES HAROLD CEHRS A THESIS submitted to OREGON STATE COLLEGE in partial

Heat transfer to lubricating oil of an internal combustion engine with varying operating conditions

Creator:: Aungst, Raymond Charles
Resource Type:: Masters Thesis
Full Text:: OIL OF AN INTERNAL COiBUSTION ENGINE WITi VARYING OPERATING CONDITIONS by RAYMOND CHARLES AUNGST

Computational Design for Metal Organic Responsive Frameworks (MORFs)

Creator:: Manion, Charles A.
Abstract:: Metal organic Frameworks (MOFs) that experience stimuli induced structural transformation could enable a whole new class of materials with remarkable properties. Photoactuating moieties in the structure could effect changes in the pore space or macroscale shape change enabling light driven gas separation and actuators. Here, we present a novel approach...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Charles A. Manion for the

Initial performance of rigid, porous sheets of sintered-polyethylene powder for filtering airborne sander dust

Creator:: Anderson, Charles Michael
Resource Type:: Dissertation
Full Text:: -polyethylene powder for filtering airborne sander dust AN ABSTRACT OF THE THESIS OF CHARLES MICHAEL ANDERSON

Numerical design of a high-flux microchannel solar receiver

Creator:: Rymal, Charles
Abstract:: This thesis discusses the design of several microchannel solar receiver devices for use in CSP (concentrated solar power) using CFD (computational fluid dynamics) simulations. The goal is to demonstrate that, by taking advantage of the higher heat transfer coefficienct of microchannels, solar receivers can achieve higher efficiency than current receiver...
Resource Type:: Masters Thesis
Full Text:: 1 AN ABSTRACT OF THE THESIS OF Charles Rymal for the degree

Off-design analysis and control of a wood-fired combined-cycle power plant

Creator:: Brawn, Robert Charles
Abstract:: This report presents the off-design analysis of various wood-fired combined-cycle power plants using a computer model to simulate plant performance. The combined-cycle systems investigated are characterized by having a woodfueled combustor, an indirect-fired gas turbine, and a Rankine steam cycle. This work was conducted as part of a larger biomass...
Resource Type:: Masters Thesis
Full Text:: -cycle power plant AN ABSTRACT OF THE THESIS OF Robert Charles Brawn for the degree of Master of

Enabling safety-informed design decision making through simulation, reasoning and analysis

Creator:: Jensen, David Charles
Abstract:: While many organizations claim to "put safety first," safety is rarely considered early in the design process when system-level architectural decisions are made. Instead, system design follows an abstraction-to-detail process to first meet functional and then performance requirements. Following this process, safety assurance occurs in the later stages of design...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF David Charles Jensen

Design analysis using function-based failure propagation in failed system states

Creator:: Jensen, David Charles
Abstract:: For safety critical complex systems, reliability and risk analysis are important design steps. Implementing these analyzes early in the design stage can reduce costs associated with redesign and provide important information on design viability. In the past several years, various research methods have been presented in the design community to...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF David Charles Jensen for the degree of Master of Science in

Experimental combustion analysis and development of representative fuel specifications for selected wood and refuse derived fuel pellets from the Pacific Northwest

Creator:: Haluzak, Charles Craig
Abstract:: An experimental biomass combustion facility has been built and established at Oregon State University. The furnace, or Biomass Combustion Unit ( BCU ), uses an augertype fuel feed system, grate-type fuel support with under and over fire air supply. Fourteen pellet species from five States - Alaska, Washington, Oregon, Idaho,...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Charles Craig Haluzak for the degree of Master of Science in

Elastodynamic analysis of a propagating finite crack in a micropolar elastic solid

Creator:: Han, Seog-young
Abstract:: A dynamic propagation of a finite crack of opening mode in a micropolar elastic solid was investigated. By using an integral transform method, a pair of twodimensional singular integral equations governing stress and couple stress was formulated in terms of the displacement transverse to the crack, macro- and microrotations, and...
Resource Type:: Dissertation
Full Text:: ./Kenn-60 Redacted for Privacy Mysore N. L. narasimnan A dynamic propagation of a finite crack of

Numerical study of flow maldistribution in microchannels using fully resolved simulation

Creator:: Martin, Mathieu Georges Charles
Abstract:: This thesis addresses numerical simulation of flow maldistribution in microchannels. Microchannels are often associated with two phase-flows which can generate many problems such as plugging the channel or perturbing the flow. In this study we have used CFD and fully resolved technique to simulate what would happen in the case...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mathieu Georges Charles Martin

Implementation and evaluation of a participating media radiation model in the TEMPEST thermal-hydraulic computer code

Creator:: Rector, David R.
Abstract:: In this work, a method for solving the differential form of the radiative transfer equation was implemented into an existing three-dimensional thermal-hydraulic computer program known as TEMPEST. The method used was the P-l approximation, where the angular distribution of the radiation intensity is represented by a truncated series of spherical...
Resource Type:: Masters Thesis
Full Text:: thank the other members of my committee, Dr. William Kinsel, Dr. Richard Collingham, and Dr. Charles E

Model predictive control for sagittal plane locomotion

Creator:: Maunder, Cary R.
Abstract:: A distinct characteristic of legged locomotion is its periodic nature. This periodic motion, in the form of a periodic orbit, has been the target of many walking and running control strategies. The spring loaded inverted pendulum (SLIP) has become a popular model of sagittal plane locomotion, exhibiting behavior characteristic of...
Resource Type:: Masters Thesis
Full Text:: t s t J t L t u dtφ= + ∫ , (2.1) where φ is the performance index applied at a specific time, st

Optimal soaring by a small autonomous glider

Creator:: Kyle, Jason A.
Abstract:: Extending the flight time of an autonomous unmanned air vehicle by soaring is considered. A suboptimal controller is developed and successful static soaring is demonstrated with a 6 degree of freedom glider model. Altitude gain rates of between ¼ and ½ m/s are achieved with this simple implementation. A hybrid...
Resource Type:: Dissertation
Full Text:: −⎧ ⎫ ⎡ ⎤ ⎧ ⎫ ⎧ ⎫ ⎧ ⎫ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪⎢ ⎥= − + +⎨ ⎬ ⎨ ⎬ ⎨ ⎬ ⎨ ⎬⎢ ⎥ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪⎢ ⎥−⎩ ⎭ ⎣ ⎦ ⎩ ⎭ ⎩ ⎭ ⎩ ⎭ (4) 9 [ ] [ ] [ ] [ ]1 1 1 0 0 0 A C A C A C p r q p L L q I r p I q I M I M r q p r N N

Reduced order modeling of legged locomotion in the horizontal plane

Creator:: Wickramasuriya, Gamika Arun
Abstract:: Sprawled-posture insects exhibit a remarkable ability to rapidly run in a stable manner over complex terrain, a feat that has yet to be equaled by man-made legged robots. Recent experimental results suggest that these insects may employ a hierarchical control structure, in which locomotion performance emerges from a combination of...
Resource Type:: Dissertation
Full Text:: Dr. John Schmitt for mentoring, teaching and guiding me over the years. I thank Dr. Charles E. Smith

Void fraction variations in a fractal-like branching channel network

Creator:: Cullion, Rebecca
Abstract:: Two-phase flow in a fractal-like branching microchannel heat sink may have enhanced heat transfer capabilities over single phase flow in the same branching channel network. In order to exploit this potential, a complete understanding of flow boiling in this geometry is required. The fractal-like geometry is similar to that of...
Resource Type:: Dissertation
Full Text:: . Charles Brunner, Dr. Murty Kanury, Dr. James Liburdy, and Dr. Vinod Narayanan for serving on my

An experimental study of natural convection heat transfer from a horizontal cylinder array vertically aligned to and confined by a single wall and two walls

Creator:: Al-Alusi, Thamir R.
Abstract:: Convection heat transfer was experimentally investigated for two different geometries. One case had three horizontal cylinders in a vertical plane placed between two vertical walls. The second case had three horizontal cylinders in a vertical plane with only one vertical wall. Several different cylinder center-tocenter spacings were investigated. The wall...
Resource Type:: Dissertation
Full Text:: Professor Charles Smith, for their time and assistance. I would like to thank Dr. Donald Trent, visiting

Kinematic analysis of legged system locomotion on smooth horizontal surfaces

Creator:: Baek, Yoon Su
Abstract:: This thesis presents a model of legged locomotion in which position and velocity of body are directly controlled by positions and velocities of feet. One central relationship between foot acceleration, leg stroke and body velocity is developed. Procedures for determining all parameters of a step sequence including periods of constant...
Resource Type:: Dissertation
Full Text:: . Fichter and his wife, Dr. Becky L. Fichter, for their advice and encouragement. Many of the results of

Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking

Creator:: Lovejoy, Steven C.
Abstract:: A need exists to develop a non-destructive testing technique that can identify the formation and propagation of diagonal tension cracks in conventionally steel reinforced concrete deck girder (RCDG) highway bridges in the State of Oregon. Such a technique could be included into a structural health monitoring (SHM) system installed on...
Resource Type:: Dissertation

Response of guyed offshore towers to stochastic loads in the presence of steady current

Creator:: Brynjolfsson, Sigurdur
Abstract:: The validity of the widely used stochastic linearization method for analysing the response of guyed towers to stochastic loads is investigated. The governing equations of a guyed tower have two main sources of nonlinearities, fluid-structure interaction and the restoring force of the cables. In this study, two models are considered....
Resource Type:: Dissertation
Full Text:: . Robert E. Wilson and Charles E. Smith for their advice and encouragement during the course of this work

Mechanical design history content : the information requests of design engineers

Creator:: Kuffner, Tom A.
Abstract:: This thesis reports on research conducted to determine the information which should be included in a mechanical design history. This is part of a larger research effort aimed at developing a computer tool for storing and replaying mechanical design history information. Three question-asking protocols were conducted to determine what information...
Resource Type:: Masters Thesis
Full Text:: council: Charles Smith, Andrzej Olas, and James Looney. The other student members of the research group

Theoretical and implementation improvements for difference evaluation functions

Creator:: Colby, Mitchell Kataichi
Abstract:: Multiagent learning with cooperative coevolutionary algorithms is a critical area of research, and is relevant to many real-world applications including air traffic control, distributed sensor network control, and game-theoretic applications such as border patrol. A key difficulty in multiagent learning is the credit assignment problem, where the impact of each...
Resource Type:: Dissertation

Combustion Characteristics of a Jet Fuel and its Surrogate in MILD Conditions

Creator:: Weide, Parker D.
Abstract:: This research seeks to identify how changes in temperature and oxygen concentration in the reaction zone affects liftoff heights for moderate or intense low-oxygen dilution (MILD) combustion of a jet fuel and a surrogate fuel. MILD combustion offers a method of burning fuels with reduced CO and NOx production by...
Resource Type:: Masters Thesis
Full Text:: Characteristics of a Jet Fuel and its Surrogate in MILD Conditions Abstract approved: David L. Blunck This

A simplified model of heat transfer between large-particle gas-fluidized beds and immersed surfaces

Creator:: Bakke, Paul D.
Abstract:: A simplified model of the combined particle convective and radiative components of heat transfer between large-particle gas-fluidized beds and immersed surfaces was developed. This analytical model was based on the single particle formulation of Adams and Welty [4,9], with the added assumptions of one-dimensional heat conduction in the particle and...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for Privacy Ronald L. Adams A simplified model of the combined particle convective

Chemometrics-based Approach for Predicting Low Temperature Combustion Engine Fuel Performance

Creator:: Daly, Shane
Abstract:: Low temperature combustion (LTC) engines offer improved efficiency and reduced emissions over traditional gasoline spark-ignited and diesel compression-ignition engines. The ability to produce fuels optimized for LTC engines could help increase efficiency and therefore improve fuel economy, insomuch that Federal fuel economy standards could be met. Currently, a fuel performance...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Christopher L. Hagen Kyle E

Numerical study of natural convection in square partitioned and non-partitioned enclosures

Creator:: Sukkaset, Prasart
Abstract:: Heat transfer characteristics and associated temperature and flow fields for natural convection in two-dimensional, square, partitioned and non-partitioned enclosures have been determined for Grashof numbers ranging from 10³ to 10⁶. The vertical side walls of the enclosure are isothermal with all other surfaces assumed to be adiabatic. An adiabatic partition...
Resource Type:: Dissertation
Full Text:: , Professor Charles E. Smith, Professor Timothy C. Kennedy and Professor Harold I. Laursen, for their time

A numerical analysis of ice fog produced by automobiles

Creator:: Nelson, William George
Abstract:: A model of an exhaust plume was developed and programmed on a digital computer. The purpose of the model was to predict the concentration and size distribution of ice particles produced from automobile exhaust during arctic conditions. The model accounted for the nucleation, growth, and freezing of the condensed water...
Resource Type:: Dissertation
Full Text:: Hewson, Dr. William P. Lowry, Professor John G. Mingle, and. Dr. Charles E. Wicks for their assistance

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