Index Catalog // ScholarsArchive@OSU

A parametric analysis of the capabilities of undersea acoustic imaging

Creator:: Calligan, C. C.
Abstract:: The feasibility of utilizing acoustic imaging techniques for improving the undersea viewing capability of small submersibles is investigated. The limiting values of major parameters in acoustic imaging systems are established and graphs which illustrate the parametric relationships are presented. A series of sample calculations illustrate how the graphs can be...
Resource Type:: Masters Thesis

Digital model of a synchronous generator excitation system

Creator:: Ramchandani, Hiranand Balchand
Abstract:: This thesis develops a simplified and logical simulation model for an amplidyne excitation system for a synchronous generator with an automatic voltage regulator. The non-transfer function representation using field determined parameters including variable inductance and machine saturation was used to reduce the computing time for the stability analysis. The simulation...
Resource Type:: Masters Thesis

A computer controlled robot analyzer for in situ water quality monitoring

Creator:: Birch, Kenneth Norman
Abstract:: A new, computer oriented system for automatic, in situ monitoring of water quality is proposed which makes full and effective use of modern computer technology. The main objective of this thesis work was the development of the concept for in situ computer controlled experimenting as a reasonable and effective means...
Resource Type:: Masters Thesis

The identification of Dungeness crab from the power spectral density function of their acoustic signature

Creator:: Eghbali, Hassan J.
Abstract:: The power spectral density of the acoustic signature of Dungeness crab was calculated by the use of digital computer. The signal produced by the Dungeness crab was an analog signal. Therefore a conversion of the signal from analog to digital was necessary. This was done by sampling the acoustic signature...
Resource Type:: Masters Thesis

Theoretical influence of untransposed transmission line construction on system losses and voltage balance

Creator:: Chanakorn, Chavalit
Abstract:: The purpose of this thesis is to investigate the necessity of transposition in the construction of overhead transmission lines. Line currents, line voltages and line losses of both the transposed and untransposed lines were calculated and compared for two different voltage classes. The conventional method of symmetrical components was used...
Resource Type:: Masters Thesis

Radiation losses in microstrip circuits

Creator:: Lo, Sui-Sang
Abstract:: The purpose of this study is to investigate radiation losses in microstrip circuits. Expressions are derived to evaluate the radiation resistances (or conductances) for single terminated, open and short-circuited lines. The quality factor Q of open and short-circuited stubs is evaluated. An analytical procedure is formulated to evaluate the radiation...
Resource Type:: Masters Thesis

Analysis and synthesis of exponentially tapered, nonuniform transmission line impedance transformers

Creator:: David, Frank Kolar
Abstract:: The exponentially tapered, nonuniform transmission' line, applied as an impedance transformer, is analyzed and modified. The analysis develops an expression for the input reflection coefficient that has the magnitude and phase as distinct functions. This allows ease in comparing the approximate and exact solutions and in developing the S-parameters for...
Resource Type:: Masters Thesis

Application of microstrip transmission line to high speed digital data bus

Creator:: Soong, Wilson
Abstract:: Recent acheivements in high speed digital integrated circuits has prompted the system designers to search for a practical method of inter-connecting these high speed circuits. This paper describes the implementation of the microstrip transmission line on a high speed digital data bus. Transmission line and characteristic impedance, termination with single...
Resource Type:: Masters Thesis

Hierarchial digital communication processing in a multi-access tele-communication environment

Creator:: Fryklund, James
Abstract:: This paper is concerned with the application of hierarchial and parallel computing structures to digital data communications processing in a multi-access telecommunications environment. Designs are analyzed and evaluated in terms of data collected from remote access tele-communications traffic and in terms of the application to several processing problems in the...
Resource Type:: Masters Thesis

REGTRAN and MICRO, the implementation of two digital system simulators

Creator:: Baheti, Padma R.
Abstract:: REGTRAN (REGister TRANsfer), a hardware description language and SYSSIM (SYStems SIMulation), a simulator for the system described by REGTRAN were originally developed by Edward Pett, Jr [33] at the University of Texas at Austin. These two programs are successfully used to simulate many digital systems of complex nature. It is...
Resource Type:: Masters Thesis

Instrumentation system for high speed data sampling of electrical machinery

Creator:: Brisbine, Glen Edward
Abstract:: The objective of this thesis is to develop criteria for a data acquisition system for electrical machinery capable of sampling a signal every 0.2 msec with a desired accuracy of 0.1%. The system to be measured includes both AC and DC voltage and current signals from several points. The main...
Resource Type:: Masters Thesis

The design of an interface between IEEE standard bus and unibus-CP1100/GPIB interface

Creator:: Aghdasi, Farhad
Abstract:: CP1100/GPIB Interface is an interface between the "General Purpose Interface Bus", which is an implementation of the Universal Bus described in IEEE Standard 488-1975, and Unibus. This interface enables TEKTRONIX CP1100 series controllers to operate GPIB- compatible instruments connected to the General Purpose Interface Bus. The designer can now incorporate...
Resource Type:: Masters Thesis

A schemata model of real-time information processing systems

Creator:: Szulewski, Paul A.
Abstract:: In an attempt to provide a practical means to measure the information processing capacity of a real-time digital processing system a theoretical framework, the Real-Time Schemata, whose basis is a schematic description and a measure of "useful information," is presented. The description applies to processes that would typically be implemented...
Resource Type:: Masters Thesis

Industrial power system faults

Creator:: Badr, Ahmad Mohamad Amin
Abstract:: The purpose of this thesis is to represent and calculate unsymmetrical secondary faults on a grounded wye-to-delta transformer bank. This thesis is specifically concerned with the secondary connections often encountered in industrial installations. Faults on these systems have not been adequately investigated. Three types of faults are considered, namely: 1....
Resource Type:: Masters Thesis

Computer analysis of a class of acoustic signals

Creator:: Miller, Michael Robert
Abstract:: A procedure for displaying cursory computer analyses of time series acoustic signals is described. The graphic presentation is optimized for visual analysis. The results displayed represent time series signals and/or Power Spectral Density estimates. Both hardware and software components of the procedure are described and compared with current methods. Suggestions...
Resource Type:: Masters Thesis

Analysis and simulation of a variable speed induction motor

Creator:: Haskins, Raymond A.
Abstract:: A model of a squirrel cage induction machine, d.c.- link power supply and centrifugal pump is developed and used in the design and evaluation of a perturbation feedback control system for a sewage pumping station. A comparison of the simulation model of the induction machine and a laboratory machine to...
Resource Type:: Masters Thesis

Compartmental analysis of the immune system

Creator:: Lawrence, Karen
Abstract:: A compartmental model of the immune system is simulated. Chapter I discusses the importance of such a model, reviews past immune system models, and summaries the immunological theory the model is based upon. In Chapter II, the compartmental representation of the immune system is developed from immunological and physiological theory....
Resource Type:: Masters Thesis

A study of time series interpolation and decimation with signal processing applications

Creator:: Kraemer, Thomas Fredrick
Abstract:: Decimation and interpolation is shown to be an effective technique for reducing the storage requirements for bandlimited time series. Interpolation and decimation is theoretically developed using z-transform theory and graphically interperted. A sequence of data acquired by sampling a sonar signal is used to demonstrate the effects of decimation. Using...
Resource Type:: Masters Thesis

A simulation study of a heuristic technique for approximating availability percentiles for cascaded independent systems

Creator:: Squire, David Charles
Abstract:: This thesis presents work done to verify the accuracy of a heuristic method for computing availability percentiles for cascaded independent systems. Previous work has provided a model for a single line that will be used as the basis for a simulation of cascaded and parallel systems of lines. The simulation...
Resource Type:: Masters Thesis

Nonsymmetrical coupled microstrip lines for applications as ideal directional couplers

Creator:: Emery, Timothy R.
Abstract:: A variational integral method in the Fourier transform domain is used to calculate the characteristic normal mode parameters of a coupled pair of nonsymmetrical microstrip transmission lines in an inhomogenous dielectric medium under quasi-TEM conditions. These together with the theory of such structures are used to show that ideal directional...
Resource Type:: Masters Thesis

Search Constraints

Search Results

Limit your search