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 15 of 15 for “"Lagrangian Dynamics"”.
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Lagrangian dynamics of turbulent Rayleigh-Benard convection
U of I Only Restriction Lifted for Item 112217 on 2021-08-24T09:15:10Z.
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Variationally consistent methods for Lagrangian dynamics in continuum mechanics
Rapid dynamics are commonly encountered in industrial applications such as forging, crash tests and many others. These problems are typically non-linear due to large deformations and/or non-linear constitutive relations. Such problems are typically modelled from a Lagrangian viewpoint, where the …
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Lagrangian dynamics of turbulence: Applications with 3D particle tracking velocimetry
Lagrangian dynamics of turbulence allow for a distinct characterization of the motion of particles. It is particularly useful in the understanding of dispersion, mixing, and transport phenomena. Due to the complexity and difficulty in quantifying Lagrangian properties, experimental studies on …
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Lagrangian dynamics in wall-bounded transitional and turbulent flows: Particle tracking and network-based analyses
L'abstract è presente nell'allegato / the abstract is in the attachment
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Cooperative collision avoidance control and coordination for multiagent Lagrangian systems with disturbances
… objective. The agents are assumed to follow a Lagrangian dynamics. The collision avoidance controller takes up the second part of the thesis. In the first part of this thesis, a particular Lagrangian system, the Raven II surgical robot, is studied in with the aim of highlighting the process of …
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Theoretical prediction of joint reaction force in a dynamic general 3-d pendulum tree model for human or animal motion
Lagrangian dynamics and the method of superfluous coordinates are applied to predict dynamic joint reaction forces in an idealized flexible model of a branched 3-D pendulum tree system. The number of segments and joints on the tree are adjustable as is the branching tree pattern. The segments that …
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Model-Based Shape and Motion Analysis: Left Ventricle of a Heart
… in which model parameters are functions. Lagrangian dynamics are employed to convert geometric models into dynamic models that can deform according to the forces manifested in the data points. It is thus possible to make a precise estimation of the deformation of the LV shape endocardial, …
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Theoretical framework for predicting joint reaction and ground reaction forces in a dynamic pendulum tree model of human motion
Lagrangian dynamics and the method of superfluous coordinates are applied to find ground and joint reaction forces on the human body modeled as a general branched 2-D pendulum tree system with arbitrary segments and arbitrarily distributed point masses. A theoretical framework is established for …
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Dynamic modelling of articulated figures suitable for the purpose of computer animation
… used in this thesis is based upon the inverse Lagrangian dynamics formulation, which, given the accelerations, velocities and positions of each of the articulations of the body, finds the forces or torques that are necessary to generate such motion. Dynamic analysis offers the possibility of …
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Biologically inspired attitude control of robotic systems using center of gravity reallocation
… inertial appendages to control their attitude dynamics. On the other hand, flying species such as biological bats employ their relatively heavier wings to produce inertial forces during their flight. Bats, while performing highly agile maneuvers such as upside-down perching (performed in order …
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Thermodynamics of Buried Water in Protein Cavities and Revised Algorithms for Introducing Polarizability to Molecular Dynamics Simulations
… that handles polarizability in molecular dynamics simulations were performed to allow for longer time steps. The fluctuating charge model treats partial charges as variables which are propagated using Lagrangian dynamics. A coordinate transform to normal mode charge variables is applied to …
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Enhancement of crashworthiness in car-truck collisions using damped under-ride guard and composite crush elements
A systematic study is performed to understand the dynamics of collisions involving a modern light weight passenger car and a heavy freight vehicle and to design an improved crash energy management system to reduce the severity of collisions. A concept of an energy dissipating under-ride guard is …
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Large Eddy Simulation of Leading Edge Film Cooling: Flow Physics, Heat Transfer, and Syngas Ash Deposition
… shear layer but does not influence the flow dynamics in the turbulent boundary layer at the surface. As a result, the turbulent jet decreases adiabatic effectiveness but does not have a substantial effect on the heat transfer coefficient. At B.R.=0.4, three types of coherent structures are …
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On Non-rigid Linkages
… Dynamic effects are incorporated through a Lagrangian formulation capable of resolving time-dependent actuation, different loading conditions, and transitions between distinct motions. This exposes how inertia, damping, and elastic energy storage shape the long-term response of non-rigid …
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Lagrangian observations and numerical modelling of hydrodynamics, turbulence, and sediment transport in a tidal river
… such, accurate numerical modelling of the hydrodynamics and sediment movement in these regions can prove challenging. However, it is essential to address this challenge as models are now regularly utilised as a tool to underpin coastal management projects, such as predicting pollutant dispersal, …