Index Catalog // ScholarsArchive@OSU

Measurement analysis and efficiency estimation of three phase induction machines using instantaneous electrical quantities

Creator:: Wiedenbrüg, Ernesto J.
Abstract:: Estimating the operating efficiency of an induction machine is of prime importance for modern plant management. An extensive testing program of present efficiency estimation techniques was performed at the Motor Systems Resource Facility (MSRF), during which serious shortcomings of the existing techniques were identified. The objective of the work of...
Resource Type:: Dissertation

Electrical characterization and circuit modeling of interconnections and packages for high speed circuits by time domain measurements

Creator:: Jong, Jyh-ming
Abstract:: With edge rates of high speed digital devices pushing into the sub-nano second range, interconnections with the associated packages play a major role in determining the speed, size and performance of digital circuits and systems. The purpose of this study is to develop experimental techniques based on time domain peeling...
Resource Type:: Dissertation

Adaptive model-based motion estimation

Creator:: Crinon, Regis
Abstract:: A general discrete-time, adaptive, multidimensional framework is introduced for estimating the motion of one or several object features from their successive non-linear projections on an image plane. The motion model consists of a set of linear difference equations with parameters estimated recursively from a non-linear observation equation. The model dimensionality...
Resource Type:: Dissertation

Analysis of brushless doubly-fed, stand-alone generator systems

Creator:: Gorti, Bhanuprasad V.
Abstract:: This thesis introduces a Brushless Doubly-Fed Machine (BDFM), stand-alone generator system. Development of a BDFM current-forced model, along with the analysis of air gap power distribution between the two stator windings and the rotor circuit, pave the way for the characterization and analysis of stand-alone generator systems. The main disadvantage...
Resource Type:: Dissertation

Performance optimization for doubly-fed generation systems

Creator:: Bhowmik, Shibashis
Resource Type:: Dissertation

Optimum equalization and synchronization of broadband multicarrier systems

Creator:: Lashkarian, Navid
Abstract:: The application of information theory and digital signal processing techniques to digital communication has resulted in robust methods for reliable high speed data transmission over noisy channels environments. Among these methods, multicarrier systems have become a viable solution for exploiting maximum spectral efficiency over both wideband highly dispersive static and...
Resource Type:: Dissertation

Characterization of coupled microstrip structure using FDTD

Creator:: Kim, Yoonsuk
Abstract:: A new CAD-oriented methodology for the full-wave broadband characterization of coupled microstrip structures for RF/microwave and high-speed digital circuits is presented. The characterization methodology is based on the finite difference time domain (FDTD) technique combined with a systematic extraction procedure using the normal mode approach and multiport network concepts. The...
Resource Type:: Dissertation

Characterization and reduction of local oscillator phase noise effects in communications systems

Creator:: Godshalk, Edward M.
Abstract:: Recent developments in digital communications at microwave frequencies have revealed that local oscillator phase noise is often a factor in the bit error rate (BER) analysis. Digital signals transported across microwave radio links acquire waveform jitter from local oscillator phase noise. As jitter increases so does BER. The main goals...
Resource Type:: Dissertation

Investigation and mitigation of the adverse effects of PWM adjustable speed drives

Creator:: Zhang, Haoran
Abstract:: With the introduction of high speed semiconductor power devices and the increased application of adjustable speed drives (ASDs) for efficient speed control of ac motors, there has been a growing number of costly motor-drive related process failures. It has been found that the high dv/dt and high switching frequency have...
Resource Type:: Dissertation

Fabrication and characterization of ACTFEL devices

Creator:: Keir, Paul D.
Abstract:: The goal of this thesis is the identification and synthesis of high-luminance, primary color alternating-current thin-film electroluminescent (ACTFEL) devices. Special attention is paid to the synthesis of primary color green ACTFEL devices because of the lack of an adequate primary green ACTFEL phosphor and the dominance of green wavelengths in...
Resource Type:: Dissertation

ScholarsArchive@OSU

Measurement analysis and efficiency estimation of three phase induction machines using instantaneous electrical quantities

Electrical characterization and circuit modeling of interconnections and packages for high speed circuits by time domain measurements

Adaptive model-based motion estimation

Analysis of brushless doubly-fed, stand-alone generator systems

Performance optimization for doubly-fed generation systems

Optimum equalization and synchronization of broadband multicarrier systems

Characterization of coupled microstrip structure using FDTD

Characterization and reduction of local oscillator phase noise effects in communications systems

Investigation and mitigation of the adverse effects of PWM adjustable speed drives

Fabrication and characterization of ACTFEL devices

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