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.
Results
Showing 1 to 15 of 15 for “"Manufacturing Variability"”.
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Manufacturing Variability in High Pressure Turbine Rotor Blades
… give a detailed understanding of the impact of manufacturing variability on high pressure turbine rotor blade aerodynamic and proposes several means by which the effects of manufacturing variability can be mitigated. A prerequisite for the aerodynamic studies is the ability to process the …
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Manufacturing variability; effects and characterization through text-mining
… often underestimate or neglect the effects of manufacturing variability and, as a result, make overly optimistic assumptions about their technologies. In this thesis, I explore the effects of manufacturing variability and find ways to characterize the manufacturing variability of emerging …
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The effects of manufacturing variability on turbine vane performance
… to turbine rotors. The limitations of the manufacturing process with regards to accuracy and precision mean that no vane will exactly match the design intent. This research effort is an investigation of the effects of manufacturing-induced geometry variability on the performance of a …
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Probabilistic turbine blade thermal analysis of manufacturing variability and toleranced designs
Manufacturing variability is likely the primary cause of a large scatter in the life of gas turbine hot-section components. This research deals with schemes to improve robustness through tolerancing input parameters in ranges of the distributions which make non-conformances more likely. The need …
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Probabilistic aerothermal design of gas turbine combustors
… framework for assessing the impact of manufacturing variability on combustor liner durability. Simplified models are used to link combustor liner life, liner temperature variability, and the effects of manufacturing variability. A probabilistic analysis is then applied to the simplified …
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Design and manufacturing analysis of resonantly coupled circuits and other components used for wireless benefit-denial system
… of the resulting force is presented. Due to the manufacturing variability of each component, the force generated by the enabler in the lock is uncertain. In the thesis, an analysis of the manufacturing variability and the distribution of the resulting force was conducted. A simulation model was …
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The effects of variability on damage identification with inductive learning
… to detect damage. Temperature fluctuation and manufacturing variability are specifically addressed. Temperature is shown to be a cause-effect variability which has a measurable effect on the damage identification problem. The inductive learning method is altered to accommodate temperature and …
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Analysis and design of resonant inductively coupled circuits : application to benefit denial solutions for the retail industry
… the sensitivity of the results to the circuit manufacturing variability. Under several clearly stated assumptions, it appears that the manufacturing variability of the hand-made enabler is the most significant, although it does not threaten the reliability of the current locking mechanism.
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Techniques for design and implementation of physically unclonable functions
… PUFs exploit the unclonable and unique manufacturing variability of silicon devices to establish a secret. However, as we will demonstrate in this work, the classic delay-based PUF structures have a number of drawbacks including susceptibility to prediction, reverse engineering, …
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Power Electronics Design Methodologies with Parametric and Model-Form Uncertainty Quantification
… requirements despite the presence of inevitable manufacturing variability and variations in the operating conditions. However, the trustworthiness of all the model-based design techniques depends entirely on the accuracy of the simulation models used, which, thus far, has not yet been fully …
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Robust design and tolerancing of compressor blades
… of compressor blades can be introduced by variability in the manufacturing process or by in-service erosion. Recent research efforts have focused on characterizing the impacts of this geometric variability on turbomachinery performance and designing blade geometries whose performance is …
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New strategies for electronic design automation problems
… compute workloads and time-to-market pressure, manufacturing variability and power management, to name but a few. In this dissertation, we will propose several new strategies to handle the challenges in the EDA field. Wire routing is an important step in the design of PCBs. Although there are …
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On the impact of variability and assembly on turbine blade cooling flow and oxidation life
… blade. The focus of this thesis is the impact of variability on blade cooling flow and, subsequently, its impact on oxidation life. A probabilistic analysis is performed on a commercial jet engine to quantify the variability in blade flow and oxidation life due to variability in ambient …
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Novel Ignition Approaches for Improved Hydrogen Ignition
… Potential causes include catalyst degradation, manufacturing variability, and surface condition changes. These findings highlight both the potential and reliability challenges of Pt-assisted catalytic ignition in high-pressure H₂ direct injection applications.
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Design and Mechanical Validation of Commercially Viable, Personalized Passive Prosthetic Feet
… performance of many amputees. The design, manufacturing, and provision processes used to create existing prosthetic feet are inherently low resolution; providing amputee-specific personalization with these methods is either not possible or not commercially viable. The Lower Leg Trajectory …