Index Catalog // ScholarsArchive@OSU

Development and Application of a Reduced Chemical Kinetics Model for Low-Speed Pre-Ignition Investigation

Creator:: Tran, Khang NV.
Abstract:: Gasoline direct injection engines, with downsized boosted technology, present a promising option for enhancing power density and reducing fuel consumption for next-generation engine designs to meet stringent fuel economy and emission standards. However, these developments in the low-speed and high-load operating regime are challenged by the occurrence of a new...
Resource Type:: Masters Thesis
Full Text:: SI engine, grid generation, and representation of the location and timing of the hotspot at various

From Functional Modeling to Optimization : Risk and Safety in the Design Process for Large-Scale Systems

Creator:: McIntire, Matthew G.
Abstract:: In order to more effectively design large, complex systems, risk must be accounted for throughout the design process. A systematic way to account for risk is by using system model simulation. During the conceptual design phase, functional models can be drawn to help the engineer design their system's functional architecture....
Resource Type:: Dissertation

An approach to reduced-order modeling and feedback control for wave energy converters

Creator:: Shoori J., Hesam E.
Abstract:: Wave energy holds great promise to be part of the alternative energy portfolio that will provide independence from fossil fuels. As wave energy converter (WEC) technologies mature, designing effective control strategies to extract maximum energy, extend device life, coordinate WEC operation within an array, or mitigate negative impacts of a...
Resource Type:: Masters Thesis
Full Text:: -order corresponding system is obtained as xr(s, t) = n∑ i=1 qi(t)ϕi(s) (2.1) 13 where qi(t

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

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Creator:: Wang, Hailei
Abstract:: A unique channel surface enhancement technique via diffusion-bonding a layer of conductive fine wire mesh onto the heating wall was developed and used to experimentally study flow boiling enhancement in parallel microchannels. Each channel was 1000 μm wide and 510 μm high. A dielectric working fluid, HFE 7000, was used...
Resource Type:: Dissertation
Full Text:: author would like especially to thank his wife, Qi Yu, for her support and sacrifice, which made this

Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

Creator:: Matty, Ethan P.
Abstract:: This work compares the condensation heat transfer and pressure drop for zeotropic refrigerant R-454C and its individual components, R-32 and R-1234yf, in horizontal microfin tubes. One microfin tube has a 4 mm outer diameter, 0.18 mm wall thickness, and a surface area ratio of 1.56. The second tube has a...
Resource Type:: Masters Thesis

Photonic Sintering of Nanoparticle Inks : Experimental Characterization, Computational Modeling and System Design for Additive Manufacturing

Creator:: MacNeill, William D.
Abstract:: Photonic sintering of nanoparticles is a relatively new process for sintering of nanoparticles, deposited on a substrate, into functional solid structures. The working principle of this process is the incidence of large-area broad-spectrum light onto deposited nanoparticles, which results in heat generation in the nanoparticles and their subsequent densification. Key...
Resource Type:: Masters Thesis
Full Text:: Figure 4.6: Evolution of Qh/QI for ensemble of nanoparticles with diameter (a) 10 nm (b) 20 nm (c) 40 nm

Computer-aided model generation and validation for dynamic systems

Creator:: Brisbine, Brian P.
Abstract:: The primary goal of any model is to emulate, as closely as possible, the desired behavioral phenomena of the real system but still maintain some tangible qualities between the parameters of the model and the system response. In keeping with this directive, models by their very nature migrate towards increasing...
Resource Type:: Masters Thesis
Full Text:: for i-th body. qi Vector of generalized coordinates for i-th body. qg Global list of generalized

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:: . [7] Y. J. Zhao, Y. C. Qi, “Minimum fuel powered dynamic soaring of unmanned aerial vehicles

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
Full Text:: determine how it impacted the system performance, because 99 other agents are si- multaneously impacting

ScholarsArchive@OSU

Development and Application of a Reduced Chemical Kinetics Model for Low-Speed Pre-Ignition Investigation

From Functional Modeling to Optimization : Risk and Safety in the Design Process for Large-Scale Systems

An approach to reduced-order modeling and feedback control for wave energy converters

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

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

Photonic Sintering of Nanoparticle Inks : Experimental Characterization, Computational Modeling and System Design for Additive Manufacturing

Computer-aided model generation and validation for dynamic systems

Optimal soaring by a small autonomous glider

Theoretical and implementation improvements for difference evaluation functions

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