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 20 of 58 for “"Parameter variations"”.
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Variation-Derived Chip Security And Accelerated Simulation Of Variations
<p>In modern ICs, variations can be quite troublesome. Ensuring quality and yield requires careful and resource-intensive simulation under the effects of parameter variations. Threshold voltage approximation of parameter variations can help accelerate simulations, but it comes with unknown losses …
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Control of a High-speed (<50,000 rpm) Interior Permanent Magnet Synchronous Motor
… performance is often constrained by losses, parameter variations, and deadtime effects. This thesis investigates advanced field-oriented control (FOC) strategies to address these challenges, with a particular focus on improving efficiency and robustness in HS-IPMSM operation. A comprehensive …
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Analytical and Computational Tools for the Study of Grazing Bifurcations of Periodic Orbits and Invariant Tori
… as nonsmooth or hybrid dynamical systems, under parameter variations. Accordingly, this dissertation is divided into two parts. The analytical section of this dissertation discusses mathematical tools for the analysis of hybrid dynamical systems and their application to a series of model …
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The Stub Loaded Helix: A Reduced Size Helical Antenna
… Code) to study the effects of design parameter variations. Based on those simulations, design guides are developed. The numerical simulations are verified though measurements of experimental prototypes. The program of experimental prototypes included the development of an appropriate …
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Seismic Performance Assessment of Wood-Frame Shear Wall Structures
… under the influence of modeling and analysis parameter variations. The first step towards the broad objective of seismic performance evaluation is to identify the different modeling and analysis parameters that can have a potential influence in the seismic response variations. The major …
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Vector Embedding Techniques for Player Behaviour in DOTA 2
… experiments to explore the effect of different parameters on vector quality. I explored different values for parameters, including the number of vector dimensions, the number of games, the types of interactions used in training, and step size for updating vectors over time. The results show that …
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Second law analysis and the application of the efficient power criterion to a four-temperature-level absorption chiller
… efficiency and cooling load. Systems input parameter variations are an important tool, while determining the efficiency-cooling capacity compromise. With the results found in this study, insight into future research regarding this type of systems will be gained.'
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HARMONIC MODELING AND SIMULATION OF NON-LINEAR PWM INVERTERS IN DISTRIBUTED GENERATION SYSTEMS
… equations that use the system and controller parameters to accurately characterize the power conversion harmonics resulting from the deployment of hysteresis current-controlled inverters within the ac network. In addition, the ac and dc harmonic interactions under both ideal system conditions …
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A study of aircraft agility
… optimal control problem for each of the models. Parameter variations in the initial flight condition specified by the load factor, and in the available roll and pitch control powers were studied and used to compare the models. The results indicate deficiencies in the body rate model as an …
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Overcoming nanoscale variations through statistical error compensation
Increasingly severe parameter variations that are observed in advanced nanoscale technologies create great obstacles in designing high-performance, next-generation digital integrated circuits (ICs). Conventional design principles impose increased design margins in power supply, device sizing, and …
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Modeling 0.18[m̳u̳]m BiCMOS (S18) high sheet resistance (RPH) polysilicon resistor lifetime drift
… temperature in order for voltage, current or parameter variations to be compared. When such changes to voltage, cur- rent, or parameters are permanent, no amount of further burn-ins, cool downs or temperature cycling can return the parameter of interest back to its original value it held prior …
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Carbon nanotube synthesis for integrated circuit interconnects
… of carbon nanotubes grown using simple process parameter variations: By focusing on controlling catalyst morphology evolution to obtain dense and tall carpets of vertically-aligned CNTs on insulating substrates, we were able to tune the diameter and number of walls, by simply timing the …
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A tactical planning model for a serial flow manufacturing system
… of how the tactical model reacts to different parameter variations.
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Assembly Yield Model for Area Array Packages
… board assembly focuses on finding a set of parameter values (that characterizes the process), such that the desired circuit performance specifications are met. It is usually assumed that this set of values can be accurately realized when the circuit or the assembly is built. Unfortunately, …
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Steady state vibration analysis of cam driven elastic slider crank linkage with displacement parameter variation
… these methods deal with fixed displacement parameters, parameters which were fixed once before in the design process without knowing their influence on the mechanism's dynamic behavior. The parameters are the length of rise, fall and dwell periods as well as the starting and maximum angle of …
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Dynamic Sensitivity Functions and the Stability of Power Systems With FACTS Controllers
… the sensitivity of system trajectories to system parameters or pre-fault loading conditions. The more stressed the system is, the greater are the sensitivities. This provides a useful indicator of system stress and by normalization, one can compare different contingencies. It is well known that …
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Learning low-dimensional feature dynamics using convolutional recurrent autoencoders
… in prediction tasks for systems with large parameter-variations and its stability in long-term prediction.
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Advanced Control Schemes for High-Bandwidth Multiphase Voltage Regulators
… high-BW design, and adaptively compensates the parameter variations. Firstly, an equivalent circuit model for generic current-mode controls using DCR current sensing is developed to analyze the impact of component tolerance in high-BW design. Then, the existing state-of-the-art auto-tuning …
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Thermal Response of Integral Abutment Bridges With Mse Walls: Numerical Analyses and a Practical Analysis Tool
… this research quantify the influence of design parameter variations on the effects of thermal displacement on system components, and thus provide guidelines for IAB design, where none had existed before. One of the findings is that corrugated steel pipes around abutment piles are not necessary. …
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Design of self-repairing digital PID controllers for non-square multivariable plants
… plant survivability in theface of severe plant-parameter variations characterised by actuator failure.It is accordingly shown in this thesis that self-repairing digital control systems can bedesigned by extending the domain of applicability of the digital PID controller introducedby Porter et al …
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