Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Scaled model"”.
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Design of a free-running, 1/30th Froude scaled model destroyer for in-situ hydrodynamic flow visualization
Hydrodynamic flow visualization techniques of scaled hull forms and propellers are typically limited to isolating certain operating conditions in a tow tank, circulation tunnel, or large maneuvering basin. Although cost effective, these tests provide a limited perspective on the interactions of the …
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Development and evaluation of a dynamically scaled testbed aircraft for a visual inertial odometry dataset
… manufacturing, and testing of a dynamically scaled aircraft, which is a scaled model of a general aviation vehicle that dynamically behaves in a similar manner as the full-scale aircraft. This scaled model (Cirrus SR22T) is to serve as a testbed for both Distributed Electric Propulsion (DEP) …
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Scaled electromechanical modeling of the F-35A Joint Strike Fighter
… as well as its aerodynamic characteristics, a scaled electromechanical model of the JSF F-35A variant was constructed using limited information about the aircraft's unclassified dimensions and features. The design process involved at first a CAD solid model of the entire structure. Once the …
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Z-source circuit breakers in naval power systems
… turn-on of the thyristor. An electrically-scaled model and a simulation model are used to characterize voltage transients that could lead to this false triggering. The results of this experiment show that these transients are within the specifications of commercially available components. …
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Geometrically Nonlinear Aeroelastic Scaling
… are demonstrated by designing an aeroelastically scaled model of a suitably nonlinear full-scale joined-wing aircraft. The best of the methods produce scaled models that closely replicate the target aeroelastic behavior. Internal loads sensitivity studies show that internal loads can be …
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Development And Characterization Of Beamforming Antenna Systems
… of the beamforming antenna systems as a scaled model for customized RFID systems. In this work, an Fabry-Perot Cavity (FPC) antenna system consisting of a single source and frequency selective surface (FSS) is proposed (chapter 2) and investigated. Since the FPC antenna system removes …
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Traction Control Study for a Scaled Automated Robotic Car
… based on road surface conditions. For this model, the desired traction/slip is maintained for a specific surface which happens to be a Lego treadmill platform. How the platform evolved and the robot car was designed are also covered. To parameterize the system dynamics, simulated annealing …
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Modeling a vehicle suspension system as an educational laboratory exercise
… specific mathematical and applicable concepts of modeling a vehicle suspension system to students in the 2.672 class at MIT, a design of a lab apparatus and plan of the procedure for a laboratory exercise featuring the necessary materials was completed. Specifically, the exercise had the goal of …
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Study of the Virginia V-notch weir-box culvert combination gaging station
… the discharge and the measured flow stage. Scaled model studies have been previously made for the same gaging station and the result is found practically agreeable. Theoretical analysis shows that the weir is hydraulically short-created. A suggestion, to place the flow stage measuring …
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The Design of Daylight Transporting Systems for Deep Space Illumination
… The three most promising geometric designs from scaled model tests were selected, installed and tested for efficiency in the full-scale test cell.
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The influence of caprock on blast fragmentation distribution
… describes the development of a small-scale model of a caprock-laden quarry blast and discusses the results from that testing. The purpose of this testing was to provide insight into the reasons for poor caprock breakage during blasting.</p> <p>Small-scale test blocks were poured using a weak …
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Determination of the power losses on a tyre-mounted ore-grinding mill
… occurring on this mill it was decided that a scaled model be built and tested. Such a model mill was designed through the dimensional analysis and similitude technique. This technique enables the reduction of the number of variables to be tested by grouping them into a set of dimensionless …
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Autonomous Vehicle Control using Image Processing
… autonomous vehicle system using a small scaled model vehicle. The system is capable of operating in two different modes: telerobotic manual mode and automated driving mode. In telerobotic manual mode, the model vehicle is controlled by a human driver at a stationary remote control station …
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Aerodynamic Parameter Identification of a Venus Lander
… to identify the parameters of an aerodynamic model for a Venus lander based on experimental free-flight data. The experimental free-flight data were collected in the NASA Langley 20-ft Vertical Spin Tunnel with a 25-percent Froude-scaled model. The experimental data were classified based on …
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Estimating Flow Through Rock Weirs
… a rock weir equation and discharge coefficients. Scaled model rock weirs were tested in a 1 m x 8 m x 0.4 m recirculating flume. Rock weirs varied by length (0.152 m, 0.305 m, and 0.457 m), depth (0.152 m and 0.305 m), and minimum rock diameter (12.7 mm, 19.1 mm, 25.4 mm). Three channel slopes …
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Analysis of Ship Airwakes Using Modal Decomposition
… unsteady, and turbulent airwake produced by a scaled model of a generic Navy ship (Simple Frigate Shape No. 2) was investigated in a low-speed wind tunnel. Stereoscopic, time-resolved particle image velocimetry (TR-PIV) measurements were made at six different crosswise planes over the flight …
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Wind tunnel investigation of wind load on a ground mounted photovoltaic tracker
… direction and arrangement of the PV panels. A scaled model of the system was mounted on a High Frequency Force Balance (HFFB) and wind induced forces and moments were measured in a simulated atmospheric boundary layer flow. The work described herein presents an overview of the study and …
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A Control System for the Reduction of Cargo Pendulation of Ship-Mounted Cranes
… and with an experiment on a 1/24 scale model of a T-ACS (The Auxiliary Crane Ship) crane mounted on a platform moving with three degrees of freedom to simulate the ship roll, pitch, and heave motions of the crane ship. The results demonstrate that the pendulations can be significantly …
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Structural Vulnerability of Coastal Bridges Under Hurricane Conditions
… wave impact. High-fidelity finite element (FE) models were developed within ABAQUS, utilizing a Coupled Eulerian Lagrangian (CEL) analysis, to provide a cost-effective approach for evaluating bridge behavior under various hydrodynamic conditions. An experimental scaled model was used to …
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Comparison of passive cervical spine flexion in children and adults
… injury, yet the pediatric ATD neck is a size-scaled model of the adult ATD neck, with no consideration for the tissue properties and morphological changes during human development. To help understand the effects of maturation on the changes in neck flexion biomechanics, this study compared the …
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