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.
Results
Showing 1 to 6 of 6 for “"Ground Impact"”.
-
Safety considerations for operation of different classes of unmanned aerial vehicles in the National Airspace System
… hazards in UAV operation: midair collision and ground impact. Event-based models were developed describing the likelihood of ground fatalities and midair collisions under several assumptions. From the models, a risk analysis was performed calculating the expected level of safety for each hazard …
-
Design of a high torque, lightweight clutch for use in an exoskeleton to augment human running
… that can endure the forces associated with ground impact and stance phase in running and also disengage to permit a natural swing phase. The clutch makes use of radial, ratcheting clutch plates, a planetary gearbox, and a novel mechanical decoupling concept to meet the design requirements.
-
Design of a Proprioceptive Actuator Utilizing a Cycloidal Gearbox
… the stiffness in the leg for absorbing the high Ground Impact Forces created by walking locomotion. It utilizes a high torque density motor paired with a gearbox with a high gear ratio for torque multiplication. Previously work has been done to design a proprioceptive actuator design that …
-
Exploring the Link Between E-scooter Crash Mechanism and Injury Outcome Using Finite Element Analysis
… were simulated numerically across different impact speeds, approach angles, and stopper heights to characterize their influence on rider injury risk during falls. A finite element (FE) model of a standing Hybrid III anthropomorphic test device was used as the rider model after being …
-
Pedestrian Head Protection During Car To Pedestrian Accidents: In The Event Of Primary Impact With Vehicle And Secondary Impact With Ground
… is assessed using a free-motion headform impacting the vehicle's hood at a fixed angle. As such, this test setup does not capture the effect due to the vehicle front-end profile, nor does it comprehend injury due to a possible secondary impact of the pedestrian's head with ground. This …
-
Elastic Cable-Driven Bipedal Walking Robot: Design, Modeling, Dynamics and Controls
… and the robot is enabled to smooth out the foot-ground impact forces and corresponding effects by accumulating the impact energy and releasing it throughout the walking cycle.</p><p>As a part of this dissertation, a specific architecture and application of biped walking robot has been designed. …