Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"wheel design"”.
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Angled roller mecanum wheel design that exhibits speed reduction
… reduction exhibited by custom angle mecanum wheels. A simple trigonometric model is put forth for the speed reduction, along with the kinematic analysis and simulation of a 3-wheeled-vehicle. Then a 150 mecanum wheel is designed and built, along with a testing fixture allowing it to freely …
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Wheel design optimization for locomotion in granular beds using resistive force theory
… Theory to further understand the dynamics of wheeled locomotion through granular materials was explored. Resistive Force Theory is a new terradynamic model that simplifies the calculation of the forces applied to bodies moving through granular media because it utilizes linear superposition and …
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Wheel design optimization for locomotion in granular beds using resistive force theory
… These scalings are experimentally confirmed with wheel pairs of various shapes and sizes under many driving conditions in a common sand bed. How the relations may be derived alternatively by assuming Coulombic yielding and how the relations can be augmented to predict wheel performance in …
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Physical experimentation and actuated wheel design for granular locomotion using Resistive Force Theory
… experiments were conducted using 3D printed wheels and a sand testing bed to explore the applications and predictive power of the Resistive Force Theory (RFT), an empirical model based on linear superposition designed to predict the interactive forces between solid bodies and granular media. …
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Design, fabrication, and characterization of a low-cost flexural bearing based 3D printing tool head
This thesis discusses the design, characterization and optimization of a low-cost additive rapid-prototyping tool head for a technology known as Fused Filament Fabrication for use in an educational curriculum. Building a 3D printer represents an excellent educational opportunity as it requires …
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Quantitative multifactor analysis of planter settings and row unit design for corn stand establishment in precision agriculture
… parameters, soil heterogeneity, and the design of mechanical components. Critical factors, including planting speed, hydraulic downforce application, and row unit arrangement, significantly influence the quality of seed-to-soil contact and the integrity of furrow closure, which in turn …
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Radial-turbine mistuning
… is high-cycle fatigue of the turbine-wheel blades. Mistuning of the blades due to the casting process is believed to contribute to this failure mode. A laser vibrometer is used to characterize mistuning for a population of turbine wheels through the analysis of the blade-response to …
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A TEST METHODOLOGY FOR MEASURING GASEOUS CONTAMINANT TRANSFER IN ENERGY WHEELS
… contaminants within total energy recovery wheels” and contains a literature review and experimental measurements of contaminant transfer in energy wheels. The literature review showed that there is no established test methodology for measuring the contribution of adsorption/desorption to …
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Mechanical Analyses of Multi-piece Mining Vehicle Wheels to Enhance Safety
… used to analyse the performance of multi-piece wheel structures and two proposed innovative designs to enhance safety were validated by computer simulations. Fatality report analyses revealed that the majority (90%) of the multi-piece wheel failures were caused by use of lock rings. Experimental …
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Design and Optimization of a Handle Robot for Providing Bodily Support to Elderly Persons
… elderly people. Lastly, we introduce a novel design for a wheel capable of changing configuration based on the surface underneath it, such that there will always be a high coefficient of friction between the wheel and the ground. The wheel design was refined through experimental tests on …
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Computational synthesis of wheel-based mechanisms via shape and topology optimization
Several wheel-barrow mechanisms were synthesized from first principles using a topology optimization method. First, a shape optimization problem was formulated in order to generate a wheel geometry that minimizes work done while rolling over terrain. Flat and sinusoidal ground profiles were …
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Designers' Understanding of Changing Human Behaviour
A review of design models for behaviour change established that although design with an intent to change human behaviour is a topic under discussion, there is a need to understand better the perceptions that professional spatial designers hold on human behaviour and how to influence it. Therefore …