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Showing 1 to 12 of 12 for “"Rigid body motions"”.
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Dynamics and Control of Flexible Aircraft
… and incorporates in a natural manner both rigid body motions of the aircraft as a whole and elastic deformations of the flexible components (fuselage, wing and empennage), as well as the aerodynamic, propulsion, gravity and control forces. The aircraft motion is described in terms of three …
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INTERPOLATION OF RIGID-BODY MOTION AND GALERKIN METHODS FOR FLEXIBLE MULTIBODY DYNAMICS
Traditionally, flexible multibody dynamics problems are formulated as initial value problems: initial states of the system are given and solving for the equations of motion yields the dynamic response. Many practical problems, however, are boundary rather than initial value problems; two-point and …
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Antarctic tabular icebergs in ocean waves
… iceberg geometry, structure and other features, rigid body motions and surface strains. We show that tabular icebergs respond to ocean waves of medium (15-30 s) and long (>30 s) periods, but that they act as filters to very short (<10 s) period waves. A two-dimensional, linear model of rigid body …
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Investigation of efficient geometric shape algorithms for numerical simulation of discrete particle systems
… transformations, and resolution of forces and motions in the context of rigid body motions. The details of a generalized computational implementation of the representation are also given, and empirical convergence properties are compared with a different method for detecting contact between …
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Discrete-time Stable Geometric Controller and Observer Designs for Unmanned Vehicles
… bundle of the six-dimensional Lie group of rigid body motions, SE(3). We formulate both asymptotically and finite-time stable tracking control schemes for underactuated rigid bodies that have one translational and three rotational degrees of freedom actuated, in discrete time. Rigorous …
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Maneuver and control of flexible spacecraft
… a three-dimensional spacecraft undergoing large rigid-body maneuvers are derived. The elastic motions are assumed to remain in the linear range. A method of substructure synthesis is presented which spatially discretizes the equations of motion. A perturbation approach is used to solve the …
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Numerical Simulations of the Aeroelastic Response of an Actively Controlled Flexible Wing
… subsystems and it is not restricted to periodic motions or simple geometries. To illustrate the technique, we use a High Altitude, Long Endurance aircraft wing. The wing is modeled structurally as a linear Euler-Bernoulli beam that includes dynamic coupling between the bending and torsional …
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Position and vibration control of flexible space robots
… articulated space robots consisting of a rigid platform, two flexible arms, and a rigid end-effector carrying a payload, all components being serially connected through revolute joints. The mission is to carry a payload over a prescribed trajectory in the inertial space, while suppressing …
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Multi-physics and Multilevel Fidelity Modeling and Analysis of Olympic Rowing Boat Dynamics
… of variations in applied forces and rowers motions and weights on mean surge speed and oscillatory boat motions. The coupling between the rowers motions with the hull and water forces is modeled with a system of equations. The water forces are computed using several fluid dynamic models that …
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Finite element modelling and analysis of composite flywheel disk including effects of filament-winding mosaic pattern
… with the boundary conditions to prevent in-plane rigid body motions in both the radial and circumferential directions and also out-of-plane rigid body motion in the axial direction. As observed, the stress levels in the thin filament-wound composite flywheel disk could be underestimated in case of …
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Simulation of ship-ice collision dynamics.
… interaction forces are first determined from a rigid body motions simulation, and then subsequently applied as generalized forces in an analysis of flexural response. The hullgirder bending moments and stresses are extracted from the response. The modeling methodology has been verified by …
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Advances in structural dynamics, aeroelasticity and material science
… developed to study the interaction between the rigid body motions of an aircraft and its elastic modes of distortion. The computer program CALFUN (CALculation of Flutter speed Using Normal modes) was developed by the author for metallic aircraft and later extended to cover composite aircraft. …