Engineering Commons^™

Scholar Week, Gregg A. Chenoweth

Scholar Week Archives (2011-2015)

ONU Scholar Week #2.

Design Of A Retractable Vane For A Vertical Axis Wind Turbine, Thomas Powers

Student Scholarship – Engineering

This study investigated the impact of vane design for a retractable vane Savonius style Vertical Axis Wind Turbine (VAWT). Five designs were tested in a wind tunnel to find which design produces the most torque on the rotor, and to obtain a value for drag coefficient and lift coefficient. Eight position angles were selected to represent the infinite number of vane positions possible compared to the direction of the wind. The wind tunnel was not able to generate air speeds great enough to reach the Reynolds numbers (Re) required for similarity. Reynolds number independence was sought to justify extrapolation to …

Obstacle Avoidance Subsystem For An Autonomous Robot, Kirstie King

Honors Program Projects

This research project details the design and implementation of the Obstacle Avoidance Subsystem for the Tigertron autonomous robot. This subsystem is designed to function as a smaller part of the whole Software Architecture and has the purpose of detecting, through use of a Laser Rangefinder, obstacles in the vehicle’s environment. Once the hardware is set up and configured, the Tigertron’s central software control architecture requests data from the Laser Rangefinder through a serial communication channel. This data is converted into objects that represent obstacles in the form of polar coordinates. These objects are stored in a container so the central …

Scholar Week, Gregg Chenoweth

Scholar Week Archives (2011-2015)

During Scholar Week we take inspiration from 18th century preacher-scholar |ohn Wesley. As “a denominational university in the Wesleyan tradition,” scholarship and piety are thoroughly compatible here. So, in Scholar Week we tune our ear to the gong and echo of Wesley. It is not just history, but his story, even to this day. In our own scholarship projects we join a great cloud of Christians not educated out of their faith, but fashioning an educated faith, where the love of the Lord by heart, soul, strength, and mind is our great and worthy cause.

Interlaminar Subgrain Refinement In Ultrasonic Consolidation, Kenneth E. Johnson

Faculty Scholarship – Engineering

This research presents microscopic evidence of dislocation propagation and sub-grain refinement in 3003-T0 aluminium undergoing high frequency fully reversed loading conditions during the Ultrasonic Consolidation process. Dual Beam Focused Ion Beam etching techniques and Transmission Electron Microscopy were used to characterize sub-grain morphology and dislocation structure in regions that were subjected to high levels of multi-axial ultrasonic micro-strain and resultant plastic deformation. This Deformation Affected Zone is characterized by regions of reduced sub-grain sizes that form a gradual transition into larger equiaxed, grains well below the interface.

While ultrasonic welding has been explored for some time, there has been little …