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Filtering by: Creator Davis, C. O. Remove constraint Creator: Davis, C. O. Degree Field Electrical and Computer Engineering Remove constraint Degree Field: Electrical and Computer Engineering

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  • Frequency-domain, parameter estimation for a brushless, doubly-fed machine

    Creator:
    Ramchandran, Ashok
    Abstract:
    A Brushless, Doubly Fed Machine (BDFM) attempts to combine the advantages of conventional induction and synchronous types of electrical machines by its unique architecture. The validation of BDFM designs in an actual test environment requires the estimation of the BDFM model parameters from actual experimentation. Accurate values for the parameters...
    Resource Type:
    Dissertation
    Full Text:
    , Parameter Estimation for a Brush less, Doubly-Fed Machine Abstract apt:a: Ned: Gerald C. Alexander A

  • Applications of Magnetic Materials in Soft Robotics

    Creator:
    Davis, William M.
    Abstract:
    Magnetic materials can be used in modern soft robotics as a method for external stimulus actuation and motion control. By combining aspects of biology and mechanics, devices are fabricated to create a structure capable of complex movement. Applications that these devices are subject to can be broken down into four...
    Resource Type:
    Capstone Project
    Full Text:
    . Chen, O. R. Bilal, K. Shea, and C. Daraio, “Harnessing bistability for directional propulsion of soft

  • Hybrid computer simulation of wind-driven ocean currents

    Creator:
    Vithayathil, Francis Joseph
    Abstract:
    A simulation method using a hybrid computer is developed in this dissertation to enhance the study of wind-driven ocean circulation. The simulation is based on the mathematical model developed by Ekman. Pure digital simulation is not economical due to excessive computer time required for the solution of the partial differential...
    Resource Type:
    Dissertation
    Full Text:
    ( %o) { 9 T (°C)1 8 I 0 10 20 30 40 50 60 70 80 90 100 31 32 33 34 I. 10 11 12 13 14 15

  • A chopper-stablized CMOS operational amplifier

    Creator:
    Ann, Seung-Han
    Abstract:
    The chopper-stabilized operational amplifier has good low frequency noise properties. Unfortunately a simple technique for simulation of the chopper-stabilized operational amplifier has not been available. This thesis describes the implementation of a differential amplifier using chopper stabilization and its circuit modeling for the SPICE simulation. This circuit has been designed...
    Resource Type:
    Masters Thesis
    Full Text:
    , professor James C. Looney and professor Joel Davis for serving on my graduate commitee. I would like to

  • Simulation of a high voltage direct current transmission system in an electromagnetic transients program using semiconductor terminals

    Creator:
    NwaChukwu, David O.
    Abstract:
    In high voltage direct current(HVDC) systems transmission technology, a.c. power is converted(rectified) to d.c. power by means of a controlled rectifier bridge. This d.c. power is then transmitted through a d.c. link to another converter(inverter) where it is converted back to a.c. power by means of another controlled rectifier bridge....
    Resource Type:
    Masters Thesis
    Full Text:
    ) - Cos( QC. + 120)] w which yields, 1/77 Em VTA - C o s , w (2.2-4) after trignometric expansion

  • Speech deconvolution using Gaussian pulses

    Creator:
    Asadi, Mohammad Ayman O.
    Abstract:
    This dissertation introduces a new idea for frequency domain deconvolution of speech signals. The idea is to approximate a unit sample by a Gaussian pulse. The deconvolution is performed by designing a glottal inverse filter that will estimate the excitation of the vocal tract. Then, the excitation will be used...
    Resource Type:
    Masters Thesis
    Full Text:
    VOCAL TRACT SYSTEM FUNCTION O -40 C O 60.0 < 2 70.0 0 = -80.0L 90 0.0 .6 .2 .6 h Ch) ivYY

  • Weather influence on Loran-C

    Creator:
    Graulich, Markus Günter
    Abstract:
    The influence of weather on the long range radio navigation system Loran-C was investigated. The variables analyzed over a period of 255 days were: time differences (TDs), TD signal-to-noise ratios, TD standard deviations (measured at a fixed receiver location in Corvallis, Oregon), time interval numbers (TINOs) (measured at the transmitter...
    Resource Type:
    Masters Thesis
    Full Text:
    Weather influence on Loran-C AN ABSTRACT OF THE THESIS OF

  • Al-In-Sn-O thin-film transistors

    Creator:
    Stewart, Kevin A.
    Abstract:
    The aim of the research undertaken for this thesis was to develop a new high-performance amorphous oxide semiconductor (AOS) for use as a channel layer in a thin-film transistor (TFT). AOS TFTs offer higher electron mobility than the established amorphous silicon based technology. A new channel material comprised of aluminum...
    Resource Type:
    Masters Thesis
    Full Text:
    300 °C. A new method for realizing Zn-O based AOSs was proposed by researchers from Applied

  • Finite element based rotor design optimization for the brushless doubly-fed machine

    Creator:
    Salim, Mohamed Ali, 1968-
    Abstract:
    Brushless Doubly-Fed Machines have potential benefits in variable speed generation and adjustable speed drive applications by combining a robust machine structure with a reduced power converter rating. While recent work has demonstrated feasibility, steady-state performance has not been optimized. The nature of doubly-fed operation causes rotor currents of varying, relatively...
    Resource Type:
    Masters Thesis
    Full Text:
    ,'" I N IP rkA r - - N s.IN N o% 11.II a 111 "IIII/P C O r. vt. .704V A laa -'710110,11111

  • A universal CMOS current-mode operational amplifier

    Creator:
    Botelho, Cindy
    Abstract:
    It has become customary in electrical engineering to think of signal processing in terms of voltage variables to the exclusion of current variables. This tendency has resulted in voltage signal processing circuits such as voltage-controlled voltage sources (VCVS) and voltage-mode operational amplifiers. However, the VCVS operational amplifier has several limitations...
    Resource Type:
    Masters Thesis
    Full Text:
    of my defense council; Professor Steve Goodnick, Professor John Wager, and Professor Joel Davis