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University of North Dakota

Theses and Dissertations

Theses/Dissertations

Articles 1 - 3 of 3

Full-Text Articles in Mechanical Engineering

Reactive Motions In A Fully Autonomous Crs Catalyst 5 Robotic Arm Based On Rgbd Data, Arad Haselirad Aug 2015

Reactive Motions In A Fully Autonomous Crs Catalyst 5 Robotic Arm Based On Rgbd Data, Arad Haselirad

Theses and Dissertations

This study proposes a method to perform velocity estimation using motion blur in a single image frame along x and y axes in the camera coordinate system and intercept a moving object with a robotic arm. It will be shown that velocity estimation in a single image frame improves the system's performance. The majority of previous studies in this area require at least two image frames to measure the target's velocity. In addition, they mostly employ specialized equipments which are able to generate high torques and accelerations.

The setup consists of a 5 degree of freedom robotic arm and a …


Mechanical Characterization Of Composite Repairs For Fiber-Glass Wind Turbine Blades, Tanveer Singh Chawla Jan 2013

Mechanical Characterization Of Composite Repairs For Fiber-Glass Wind Turbine Blades, Tanveer Singh Chawla

Theses and Dissertations

While in service, wind turbine blades experience various modes of loading. An example is impact loading in the form of hail or bird strikes, which might lead to localized damage or formation of cracks a few plies deep on the blade surface. One of the methods to conduct repairs on wind turbine blades that are damaged while in service is hand lay-up of the repair part after grinding out the damaged portion and some of its surrounding area. The resin used for such repairs usually differs from the parent plate resin in composition and properties such as gel time, viscosity, …


Development Of A Slide-Rolling Contact Fatigue Tester, Gregory T. Dvorak Aug 2008

Development Of A Slide-Rolling Contact Fatigue Tester, Gregory T. Dvorak

Theses and Dissertations

Contact fatigue failure is a common problem experienced in many applications such as bearings, gears and railway tracks. In recent years, research companies have developed finishing processes which aim to improve a component's contact fatigue life. One such process has been patented by REM Chemicals in Texas. Preliminary contact fatigue tests have shown that this superfinishing process could potentially improve a component’s contact fatigue life by 300%. Before this technology can move from the laboratory to an industrial platform, more tests are needed to verify the claim. To the best of the author’s knowledge, no standard process or test machine …