Continuum modeling of three-dimensional truss-like space structures

AIAA Journal ◽  
1978 ◽  
Vol 16 (8) ◽  
pp. 779-787 ◽  
Author(s):  
Adnan H. Nayfeh ◽  
Mohamed S. Hefzy
Keyword(s):  
Three Dimensional ◽  
Space Structures ◽  
Continuum Modeling

Optical three-dimensional displacement measurement based on moiré methodology and its application to space structures

2022 ◽  
Vol 148 ◽  
pp. 106752
Author(s):  
Shien Ri ◽  
Takeshi Yoshida ◽  
Hiroshi Tsuda ◽  
Eiichi Sato
Keyword(s):  
Three Dimensional ◽  
Displacement Measurement ◽  
Space Structures

scholarly journals Symmetry in Regular Polyhedra Seen as 2D Möbius Transformations: Geodesic and Panel Domes Arising from 2D Diagrams

Symmetry ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 356 ◽  
Author(s):  
Jose Diaz-Severiano ◽  
Valentin Gomez-Jauregui ◽  
Cristina Manchado ◽  
Cesar Otero
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Space Structures ◽  
Inversive Plane ◽  
Delaunay Triangulations ◽  
Möbius Transformations ◽  
Regular Polyhedra ◽  
Complex Design ◽  
Elliptic Geometry ◽  
Mobius Transformations

This paper shows a methodology for reducing the complex design process of space structures to an adequate selection of points lying on a plane. This procedure can be directly implemented in a bi-dimensional plane when we substitute (i) Euclidean geometry by bi-dimensional projection of the elliptic geometry and (ii) rotations/symmetries on the sphere by Möbius transformations on the plane. These graphs can be obtained by sites, specific points obtained by homological transformations in the inversive plane, following the analogous procedure defined previously in the three-dimensional space. From the sites, it is possible to obtain different partitions of the plane, namely, power diagrams, Voronoi diagrams, or Delaunay triangulations. The first would generate geo-tangent structures on the sphere; the second, panel structures; and the third, lattice structures.

Experimental verification of a control law for the position and attitude of two objects using multiple coils

2017 ◽  
Vol 28 (17) ◽  
pp. 2450-2457 ◽  
Author(s):  
Ayako Torisaka ◽  
Sho Masuda ◽  
Satoru Ozawa ◽  
Nobuyuki Kobayashi ◽  
Hiroshi Yamakawa
Keyword(s):  
Experimental Verification ◽  
Relative Position ◽  
Attitude Control ◽  
Control Method ◽  
Three Dimensional ◽  
Current Control ◽  
Space Structures ◽  
Electromagnetic System ◽  
Magnetic Forces ◽  
Dipole System

This article presents a method for relative position and attitude control for reconfigurable space structures using magnetic force with a multi-dipole system. This technology can be applied to the docking phases of space structures that can restructure themselves by assembling basic structural units. The focus of this research is on current control of dipoles, which produces strong nonlinear magnetic forces, and on the development of a method to control a strong nonlinear electromagnetic system. In a previous study, the feasibility of using this method to perform relative position and attitude control was investigated by conducting a series of three-dimensional simulations of position and attitude control. In this study, experimental verification of the control method is conducted to determine whether magnetic forces can be used to correct position and attitude simultaneously. The good agreement obtained between the simulation results and the experimental results confirms the effectiveness of our proposed method.

Three-dimensional investigation of grain boundary–twin interactions in a Mg AZ31 alloy by electron backscatter diffraction and continuum modeling

2013 ◽  
Vol 61 (20) ◽  
pp. 7679-7692 ◽  
Author(s):  
A. Fernández ◽  
A. Jérusalem ◽  
I. Gutiérrez-Urrutia ◽  
M.T. Pérez-Prado
Keyword(s):  
Grain Boundary ◽  
Electron Backscatter Diffraction ◽  
Three Dimensional ◽  
Az31 Alloy ◽  
Continuum Modeling ◽  
Electron Backscatter ◽  
Backscatter Diffraction

Wave Coupling in Dynamic Analysis of Space Structures: Part 1—Small Axial Forces

1987 ◽  
Vol 2 (3) ◽  
pp. 147-153
Author(s):  
R. Frances ◽  
G. Rosenhouse
Keyword(s):  
Boundary Conditions ◽  
Dynamic Analysis ◽  
Three Dimensional ◽  
Coupling Method ◽  
Space Structures ◽  
Transfer Matrices ◽  
Wave Coupling ◽  
Numerical Example ◽  
Axial Forces

The wave-coupling method is implemented here for three-dimensional transfer matrices of space structures. It should be noted that sub-transfer matrices extracted from those presented here may be used to describe the boundary conditions, which saves a lot of computer space. A numerical example verifies velocity compatibility at a joint of a three-dimensional frame.

Dynamic continuum modeling of truss-type space structures using spectral elements

1996 ◽  
Vol 33 (3) ◽  
pp. 404-409 ◽  
Author(s):  
Usik Lee ◽  
Joonkeun Lee
Keyword(s):  
Space Structures ◽  
Spectral Elements ◽  
Continuum Modeling ◽  
Type Space

Dynamic continuum modeling of beamlike space structures using finite-element matrices

AIAA Journal ◽  
1990 ◽  
Vol 28 (4) ◽  
pp. 725-731 ◽  
Author(s):  
Usik Lee
Keyword(s):  
Finite Element ◽  
Space Structures ◽  
Continuum Modeling
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