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Showing 1 to 17 of 17 for “"Mechanical wear"”.
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Computer Vision Techniques for Drill Bit Identification and Mechanical Wear Detection
… two critical tasks, drill bit identification and mechanical wear detection, is demonstrated. Then, transfer learning of convolutional neural networks (CNNs) is applied to the same tasks, allowing comparison of results. This thesis also explores a means of presenting processed image outputs to …
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AN ADAPTIVE AND SELF-COGNITIVE ACE FILTER
… unwanted noise components is needed to reduce mechanical wear and provide smoother operation. The classical ACE filters now in use ate incapable of achieving a high noise, reduction ratio together with a fast transient response. In this thesis, the application of Kalman filtering of ACE signals …
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Stress intensity factors of edge cracks in dissimilar joint plates
… The development of this is caused by the mechanical wear problem, a high temperature situation or other conditions in which different properties are required from different parts of the same applications. This problem brings about the need for joining dissimilar materials. However the …
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Tunable Piezoelectric Transducers via Custom 3D Printing: Conceptualization, Creation, and Customer Discovery of Acoustic Applications
… (MIP-SL) by accounting for mechanical wear on Polydimethylsiloxane (PDMS). This work proposes a framework for the rapid manufacture of 3D printed transducers, adaptable to a multitude of transducer element forms. Using the print model and transducer framework, latticed …
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Online Parameter Adaptation of LQR Controllers via RLS for Prosthetic Joint Control: Experimental Validation on a Quanser Qube-Servo 2 Platform
… by load variations, user gait changes, and mechanical wear. Limited experimental validation exists for combining RLS with online LQR adaptation in prosthetic-like systems.</p> <p>To address these limitations, an RLS-driven Adaptive LQR framework was implemented to continuously update LQR …
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Reduction of friction in polymeric composites for artificial joint prostheses
… prosthetic failure still occurs as the result of mechanical wear of the bearing surface. Several wear mechanisms have been proposed as the main causes for failure; however, none is as dominant as the delamination wear of artificial knee prostheses. Delamination wear occurs mainly as the result of …
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Assessment of material properties in bone surrounding microdamage
… damaged bone that occurs from normal mechanical wear-and-tear or fatigue, leading to impaired tissue material properties and in some instances atypical femoral fractures.</p> <p> In these studies, we assessed the effects of acute fatigue, fatigue induced remodeling, and fatigue …
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Supercritical Fluid Extraction of Nylon 6,6 Fiber Finish and Oligomers
… that are too low result in excessive fiber and mechanical wear. On the other hand, overly high finish levels may cause residue buildup on the processing equipment. Removal of the finish has traditionally been done with solvents such as chloroform or Freon followed by gravimetric or spectroscopic …
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Development of Mechanical and Electrical Interfaces for Rapid Swap Battery Systems
… be optimized. This co-design approach enables mechanical and electrical functional requirements to be considered in conjunction to ensure reliable fulfillment in both areas while reducing the time for battery pack swaps. This work introduces two distinct approaches for aligning the pack to the …
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Fluid flow measurement using correlation techniques
… measurement offers minimum pressure drop, no mechanical wear, no blockage of pipe lines and can be used under adverse environmental conditions using a simple and robust sensing element. The flowmeter gives a linear output and accuracy better than +/- 2% can be achieved. The temperature signals …
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A COMPUTATIONAL APPROACH TO FRETTING WEAR PREDICTION IN TOTAL HIP REPLACEMENTS
… of contact geometry for a given application. “Wear” is one of a number of mechanical failures that can occur in mechanical coupling design. “Fretting wear” occurs where surfaces in contact are subjected to oscillating load and very small relative motion over a period of time. Fretting has been …
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Corrosion and Tribocorrosion Kinetics of Al-based Concentrated Alloys in Aqueous Sodium Chloride Solution
… strengthened to improve strength and wear resistance. However, localized corrosion due to the galvanic coupling between the precipitates and Al matrix often leads to degraded performance when these alloys are exposed to corrosive environment. In this work, Al-based solid solution was …
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Local tool wear profiles prediction using physics-based models
Thesis (Ph. D.)--Michigan State University. Mechanical Engineering, 2009
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Study of Titanium based Composite Coatings for Resistance against Molten Aluminium Soldering on H13 Tool Steel
… is limited predominantly by chemical corrosion, mechanical failure or mechanical wear. In the aluminium high pressure die casting industry, liquid aluminium is extremely reactive with the constituents of H13 die steel and has a tendency to form intermetallic layers. This chemical interaction …
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Determination of Wear in Polymers Using Multiple Scratch Test.
Wear is an important phenomenon that occurs in all the polymer applications in one form or the other. However, important links between materials properties and wear remain illusive. Thus optimization of material properties requires proper understanding of polymer properties. Studies to date have …
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Numerical models for the assessment of the cylinder-kit performance of four-stroke internal combustion engines
Thesis (Ph. D.)--Michigan State University. Mechanical Engineering, 2009
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A study of tool wear measurement by using image processing system
… process. Cutting tools arc consumable. Tool wear affects the outcomes of machining processes such as machined· surface quality and it is normally used as an indicating parameter for tool life. It is crucial to calculate and record the wear size of different cutting tools. The tool wear is …