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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Extending The Bandwidth Of Intensity-Based Sound Power Estimates, Michael C. Mortenson
Extending The Bandwidth Of Intensity-Based Sound Power Estimates, Michael C. Mortenson
Undergraduate Honors Theses
Sound power is often measured using the intensity-based engineering standard ANSI S12.12-1992:R2017. Traditional methods for intensity-based sound power estimation are limited in bandwidth at low frequencies by phase mismatch between microphones and at high frequencies by microphone spacing—with errors occurring well below the spatial Nyquist frequency. The Phase and Amplitude Gradient Estimation (PAGE) method has been used to extend the bandwidth of intensity calculations [1]. This thesis examines the efficacy of the PAGE method in overcoming bandwidth limitations in estimating sound power. Specifically, the sound fields from three sources—a blender, vacuum cleaner, and reference sound source—were measured according to ANSI …
Irregular Quadrature Amplitude Modulation For Adaptive Physical-Layer Security, Hunter Searle, Marco A. C. Gomes, Joao P. Vilela, Willie K. Harrison
Irregular Quadrature Amplitude Modulation For Adaptive Physical-Layer Security, Hunter Searle, Marco A. C. Gomes, Joao P. Vilela, Willie K. Harrison
Undergraduate Honors Theses
This thesis propose adding an irregular quadrature amplitude modulation (QAM) constellation to a wireless transmission scheme in order to obtain greater control over the signal-tonoise ratio (SNR) required to successfully decode the signal. By altering the separation between adjacent symbols, the minimum required SNR is raised without degradation in the performance of the scheme. This allows the system to adapt to preferable channel conditions for the authorized user, making it harder for eavesdroppers to intercept and decode the transmission, thus making the communication safer. In addition, we show that by overlaying a coset code onto the QAM constellation, a new, …
Investigating The Impact Of Taper And Aspect Ratio On A Stalling Wing Using A Corrected Vortex Lattice Method, Ryan Anderson
Investigating The Impact Of Taper And Aspect Ratio On A Stalling Wing Using A Corrected Vortex Lattice Method, Ryan Anderson
Undergraduate Honors Theses
The advent of new technologies such as eVTOL vehicles is exciting. The development of fast aerodynamics models incorporating stall is one small step on the road to realizing such concepts by improving the speed of design optimization algorithms. To this end, a modified vortex lattice model was developed based on one reported by dos Santos and Marques [4]. The model was validated against experimental data found in the literature. Making use of its stall capabilities, a sample study was performed to test for any coupling effect between aspect ratio and taper ratio. This was done by calculating the lift curve …
Steering System For Sae Baja, Dallin Colgrove
Steering System For Sae Baja, Dallin Colgrove
Undergraduate Honors Theses
This thesis is to study the different types of steering geometry for the BYU Baja vehicle. The main steering geometries of study are Ackermann and parallel steering geometries. Ackermann steering geometry is ideal for low speed turns. During low speed turns Ackermann steering performs better than parallel steering due to a smaller radius of turn. Parallel steering ideally is better for high speed turns, because with parallel steering the slip angle is smaller than that of Ackermann geometry. A recommendation is made to the BYU Baja team to use Ackermann steering, but still do some more analysis of parallel steering …
Implementation Of Augmented Reality In Sae Mini Baja, Brady S. Hales
Implementation Of Augmented Reality In Sae Mini Baja, Brady S. Hales
Undergraduate Honors Theses
Engineers often encounter difficulties in connecting digital data with its physical counterpart. This applies to processing and interpreting data as well as effectively communicating design ideas and considerations. Augmented reality has the ability to solve these problems by overlaying digital data on a physical object. This allows engineers to further explore design considerations such as ergonomics as well as communicate data such as, Finite Element Analysis. This communication may be realized in discussing and collaborating with colleagues, as well as to judges in design reviews. Augmented reality is beneficial in these cases and is further explored in this thesis, utilizing …
Dual Axis Solar Tracker: Trends, Influence & Impact, Alazone Smith
Dual Axis Solar Tracker: Trends, Influence & Impact, Alazone Smith
Undergraduate Honors Theses
This supplementary document examines the international relevance and impact of the device in the Central Washington University, M.E.T. Senior Project entitled, “Dual-Axis Solar Tracker”. This is done so by analyzing the data collected from the device, as well as related trends in society, and establishing connections between the device’s viability and its impact within the society. Climate change, the solar industry, technology, policy, and market are the main topics of research within this document to provide background and context for the methods of analysis. Following intensive research, two major research strategies were implemented: (1) the data collected from the device …