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DEVELOPMENT OF A MOTOR SPEED CONTROL SYSTEM USING MATLAB AND SIMULINK, IMPLEMENTED WITH A DIGITAL SIGNAL PROCESSOR
Title
DEVELOPMENT OF A MOTOR SPEED CONTROL SYSTEM USING MATLAB AND SIMULINK, IMPLEMENTED WITH A DIGITAL SIGNAL PROCESSOR.
Creator
Klee, Andrew, Weeks, Arthur, University of Central Florida
Abstract / Description
This thesis describes an improved methodology for embedded software development. MATLAB and Simulink allow engineers to simplify algorithm development and avoid duplication of effort in deploying these algorithms to the end hardware. Special new hardware targeting capabilities of MATLAB and Simulink are described in detail. A motor control system design served to demonstrate the efficacy of this new method. Initial data was collected to help model the motor in Simulink. This allowed for the...
Show moreThis thesis describes an improved methodology for embedded software development. MATLAB and Simulink allow engineers to simplify algorithm development and avoid duplication of effort in deploying these algorithms to the end hardware. Special new hardware targeting capabilities of MATLAB and Simulink are described in detail. A motor control system design served to demonstrate the efficacy of this new method. Initial data was collected to help model the motor in Simulink. This allowed for the design of the open and closed loop control systems. The designed system was very effective, with good response and no steady state error. The entire design process and deployment to a digital signal processor took significantly less time and effort than other typical methods. The results of the control system design as well as the details of these development improvements are described.
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Date Issued
2005
Identifier
CFE0000477, ucf:46367
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0000477
DEPICTIONS OF WOMEN IN STALINIST SOVET FILM, 1934-1953
Title
DEPICTIONS OF WOMEN IN STALINIST SOVET FILM, 1934-1953.
Creator
Weeks, Andrew, Solonari, Vladimir, University of Central Florida
Abstract / Description
Popular films in the Soviet Union were the products of the implementation of propagandistic messages into storylines that were both ideologically and aesthetically consistent with of the interests of the State and Party apparatuses. Beginning in the 1930s, following declaration of the doctrine on socialist realism as the official form of cultural production, Soviet authorities and filmmakers tailored films to the circumstances in the USSR at that given moment in order to influence and shape...
Show morePopular films in the Soviet Union were the products of the implementation of propagandistic messages into storylines that were both ideologically and aesthetically consistent with of the interests of the State and Party apparatuses. Beginning in the 1930s, following declaration of the doctrine on socialist realism as the official form of cultural production, Soviet authorities and filmmakers tailored films to the circumstances in the USSR at that given moment in order to influence and shape popular opinion; however, this often resulted in inconsistent and outright contradictory messages. Given the transformation that gender relations were undergoing in the early stages of development, one area that was particularly problematic in Soviet cinema was the portrayals of women. Focusing primarily on the Stalinist period of the Soviet History (1934-1953), I plan to look at the ways in which women were portrayed in popular Soviet cinema and specifically the ways in which these presentations shifted before, during, and after World War II.
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Date Issued
2012
Identifier
CFH0004312, ucf:45052
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH0004312
Variance in Fade-Time of a Gamma-Gamma Distributed Irradiance Signal
Title
Variance in Fade-Time of a Gamma-Gamma Distributed Irradiance Signal.
Creator
Leclerc, Troy, Phillips, Ronald, Weeks, Arthur, Richardson, Martin, Marinescu, Dan, Andrews, Larry, University of Central Florida
Abstract / Description
Free-space optical communications are predominantly hindered by optical turbulence, an effect caused by temperature and pressure variations within the atmosphere. The result is an optical wave interfering with itself due to multipath propagation via tiny refractive-index fluctuations across the wave-front. Optical communication systems are affected when the channel conditions induce fading in the irradiance signal that is received at the detector. The nature of optical interference imparted...
Show moreFree-space optical communications are predominantly hindered by optical turbulence, an effect caused by temperature and pressure variations within the atmosphere. The result is an optical wave interfering with itself due to multipath propagation via tiny refractive-index fluctuations across the wave-front. Optical communication systems are affected when the channel conditions induce fading in the irradiance signal that is received at the detector. The nature of optical interference imparted by the atmosphere is a random process and therefore the received irradiance signal is often characterized by an appropriate probability density function (PDF). Data collected during past free-space optical experiments in the atmosphere support the gamma-gamma distribution as a practical PDF model for received irradiance fluctuations, although the irradiance fluctuations do occasionally tend towards a lognormal distribution.Utilization of the gamma-gamma irradiance PDF allows for calculation of statistical moments of the irradiance threshold level-crossing distribution. Presented analysis focuses on the results of the gamma-gamma irradiance PDF. Previously, expressions were developed for the expected number of gamma-gamma distributed irradiance threshold level-crossings. Expressions for the mean square number of gamma-gamma distributed irradiance threshold level-crossings are derived and presented. The derived expressions lead to the mean and variance of signal fade time. Outcomes of the derived expressions are presented in relation to free-space optical communication system performance.Comparisons are made between the theoretical analysis and experimental data taken at the Innovative Science and Technology Facility (ISTEF) located at the Kennedy Space Center in Cape Canaveral, Florida. The strength of the atmospheric turbulence is often characterized by three measurable parameters: the refractive index structure constant Cn2, the inner scale l0, and the outer scale L0. The optical path (L~1km) was instrumented such that direct comparisons could be drawn between the measured atmospheric turbulence parameters and the parameters of the gamma-gamma irradiance model. Variance of fade time data were found to agree well for smaller apertures where effects of aperture averaging are not present and in cases where scintillation is weak to moderate. It is suggested that a more appropriate PDF, with a heavier focus on aperture averaging, may be applied in future studies of these fade statistics.
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Date Issued
2012
Identifier
CFE0004397, ucf:53153
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004397