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 17 of 17 for “"Force vector"”.
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SCALE : exploring human-object interaction through force vector measurement
… Interaction through the real-time analysis of force vector signals, which I have defined as "Force-based Interaction" in this thesis. Force conveys fundamental information in Force-based Interaction, including force intensity, its direction, and object weight - information otherwise difficult …
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Interpretation of force vector recorder data describing buoy system dynamics
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Mixed finite element analysis for arbitrarily curved beams
… for errors in the generalised displacement vector and the internal force vector. These analytical findings are compared with numerical results, verifying the role of reduced integration and the accuracy of the methods.
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Deriving a Closed-Form Solution for Over-Actuated Surface Vessels with Actuator Constraints
… that compute commands based on a surge–sway–yaw force vector among multiple independently steerable thrusters without violating actuator constraints. Conventional methods either solve a constrained optimization at every control step—incurring variable computational load—or apply pseudo-inverse …
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Haptic induced motor learning and the extension of its benefits to stroke patients
… due to neurological disease or brain injury. Force and visual feedback were manipulated within virtual environment scenarios to facilitate learning. In one force feedback condition, the subject is required to maneuver a sphere through a haptic maze or linear channel. In the second feedback …
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Functional instability of the ankle and its relationship to the Q angle.
… talar tilt. Postural sway was mapped using the Force Vector Visualisation System and peroneal muscle strength was measured using a kinetic dynamometer. Following these tests the Q angles of each participant were measured and calculated. Peak peroneal concentric torque demonstrated a significant …
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Optimization of the Aerodynamics of Small-scale Flapping Aircraft in Hover
… is optimal in the sense that for a required force vector, the aerodynamic power is minimal.</p><p>The last method incorporates the three-dimensional effects. These effects are especially important for low aspect ratio wings. Thus, a three-dimensional unsteady potential vortex method was …
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Examination of the application and limitations of structural mode extraction via force apportionment
This paper will discuss the use of force apportionment to isolate modes being excited by the sine-dwell technique. The effectiveness of the apportionment technique can be determined by examining the structural response as measured by laser vibrometry. First, the structure is investigated using …
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Non-linear dynamic modeling using component mode synthesis
… modal solution by projecting an effective nodal force vector on the modal coordinates to induce plastic deformation. The method can be tailored to the frequency range of interest to provide excellent correlation with a full-fidelity finite element solution. Numerical examples are provided to …
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"Vector chromatography" : modeling micropatterned separation devices
… by the action of species-specific external forces oriented asymmetrically relative to the body-fixed pattern. In the generic "vector" separation scheme, illustrated by our elementary example, the different species undergoing separation move, on average, in different directions relative to …
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Damping Effects of Drogue Parachutes on Orion Crew Module Dynamics
… analysis is that the drogue parachutes' net load vector aligns with the CM drogue attachment point velocity vector. This assumption seems reasonable and produces good results, but has never been experimentally verified. The wake of the CM influences the drogue parachutes, which makes performance …
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A Thousand Bells: Acoustical implementation of bell spectra using the finite element method and its compositional realization
… of the stiffness matrix and the equivalent nodal force vector for the element by using the Gauss-Lagrange quadrature. In the fourth chapter, I create bell model geometry by using 2D bell nominal curve and adjustable design variables. Physical parameters, such as the Poisson ratio, Young’s modulus, …
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Use of a Spine Robot Employing a Real Time Force Control Algorithm to Develop, Simulate, and Compare Spinal Biomechanical Testing Protocols: Eccentric Loading, Pure Moment, and a Novel Head Weight Protocol
… has taken into account the constant vertical force vector applied to C2 produced by the weight of the human head. Furthermore, we are unaware of previous direct protocol to protocol comparisons using the same testing platform and test specimens. A novel protocol, the Head Weight Loading (HWL) …
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The Development and Application of a Custom Robotic Biomechanical Testing Platform Employing Real-time Load-control to Compare Spinal Biomechanical Testing Protocols: Pure Moment, Ideal Follower Load, and a Novel Trunk Weight Protocol
… testing, or the difference between experimental forces being applied and the forces commanded by the custom motion programs executed during protocol simulation. The biomechanical data that was recorded and compared to the literature for validation was rotational range of motion in the sagittal …
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Analytical Modeling of the Mechanics of Nucleation and Growth of Cracks
… form of the interface element internal force vector and the tangent stiffness matrix are considered in the formulation. We investigate computational issues related to interfacial interpenetration, mesh sensitivity, the number of integrations points and the integration scheme, …
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Computational Analysis of Straight and Maneuvering Bat Flight Aerodynamics
… outer wing. Banking served to redirect the net force vector laterally causing a radial, centripetal force. Considering the mass of the bat, the nominal flight velocity, and the radius of curvature, the magnitude of the radial force fully explained the expected centripetal acceleration during the …