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 “"Drop test"”.
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Design of a test apparatus to study a proposed dynamic tissue puncture model
Two test apparatuses were designed, built, and evaluated in order to study a proposed dynamic tissue puncture model. The test apparatuses were designed to improve existing experiments used previously to experimentally verify tissue models. These models are incomplete due to the small range of …
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Design, manufacturing and testing of parachute recovery system for aludra SR-10 unmanned aerial vehicle (UAV)
… study focuses on the design, manufacturing and testing of Parachute Recovery System (PRS) on the Aludra SR-10 UAV. A design work of PRS involving in defining a suitable type of parachute design, parachute compartment, parachute deployment and activation mechanism system. This study was performed …
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Inverse dynamic modeling for characterization of spasticity
… to describe the motion in the pendulum knee drop test. Inverse kinematic modeling is implemented to investigate the pathophysiology of spasticity. Using the equilibrium point hypothesis as a conceptual framework to explain disabled and non-disabled neuromuscular control, it has been …
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Improving energy dissipation to lower concussion risk in football helmets
… along with the new dashpot system were further tested inside helmet shells on a head form drop test, and compared to the national standards that regulate athletic equipment.
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Advanced fluid-structure interaction techniques for modeling ringsail parachutes
… a starting condition that matches NASA drop test data and allows for a fair comparison of design variations is introduced. The effect of the geometric porosity distribution on parachute performance and stability is analyzed for three parachute configurations. Rotationally periodic …
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Validation of Seaplane Impact Load Theory and Structural Analysis of the Martin 270
<p>Flight and drop tests of the Martin 270 (M270) seaplane were conducted in 1955. Theoretical and empirical pressures were determined by use of Wagner’s theory and also by the Code of Federal Regulations (CFR). The pressure results from the experimental tests on the hull were compared with …
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Stylizing 3D Models With Generative AI for Fabrication
… changes in stress values during a simulated drop test at various stages of the stylization process, MechStyle restricts changes to those that preserve the model's structural viability. This ensures that the resulting models are both stylistically accurate to the user's desired results and …
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Leak detection in power plant heat recovery steam generators utilizing medical radionuclides
… which these leaks are detected rely on pressure drop testing: for power plants operating in today’s fast response market conditions a pressure drop test is not possible. The first evidence of a tube leak is usually associated with a catastrophic failure of a tube necessitating an unplanned plant …
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Effect of longitudinal micro fin tube enhancement in evaporation of R410A
… to 14 kW/m2, and qualities from 0.1 to 0.8. The testing facility had a 15 cm long test section heated by a secondary heated water loop, a transparent visualization section which used a high-speed camera to capture flow regimes, and vertical and horizontal pressure drop test sections. The …
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Dynamic Analysis of CubeSat Impact on Lunar Surface
… EagleCam will need to survive a 30 m drop onto the lunar surface with all internal components fully operational post impact. This thesis is focused on the analytical, numerical, and experimental methods for determining the survivability of EagleCam. The analyses performed are kinematic …
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Realization of dynamixel servo plant parameters to improve admittance control for a compliant human-robot interaction
… equations representing admittance control, and testing to determine the ability of a robotic system to represent the behavior of passivity. A method has been developed for experimentally determining the inertial, and dissipative (damping and friction) characteristics of three different models of …
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MIT/DRAPER Technology Development Partnership Program : systems, aerodeceleration, and structural design of a high-G, rapid response, deployable autonomous aerial surveillance vehicle
… sensors/communications subsystems. and finally a drop-test flyer that will perform the vehicles intended mission scenario.
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Finite element modeling of a commuter category aircraft seat under crash loading
… Beechcraft 1900C passenger seat was created and tested are described in detail. The Beechcraft seat was thoroughly analyzed, a solid model was constructed using the SolidWorks modeling tool, and a mesh model was built from the solid model using the HyperMesh code.</p> <p>The model was first …
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Design of Chassis, Impact Attenuator, Suspension and Aerodynamic Systems of a Formula SAE Car
… easy for the teams to build next year cars by testing and improving the already existing model. This thesis documents an attempt made to design the chassis, impact attenuator, aerodynamics and suspension systems of the first UH College of Technology Formula SAE car. A systematic design …
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Onboard trajectory generation for the unpowered landing of autonomous Reusable Launch Vehicles
… against traditional X-34 guidance for a drop test scenario. The results match in basic form, with differences showcasing the autonomous algorithms' preference for maximum robustness. The true strength of the onboard trajectory generator lies in its ability to handle off-nominal …
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Mathematical modeling of lead climbing falls
… force–displacement curves from published drop test data, allowing the model to capture nonlinear rope behavior and high-strain dynamics directly from experimental observations. Both approaches successfully capture key aspects of lead fall dynamics, including peak force attenuation, rebound …
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Lateral and Posterior Dynamic Bending of the Mid-Shaft Femur: Fracture Risk Curves for the Adult Population
… human cadaver femurs using a dynamic three-point drop test setup. All 45 tests resulted in mid-shaft femur fractures with comminuted wedge and oblique fractures as the most common fracture patterns. The reaction loads were used to develop the injury criteria given that they represent the …
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