Tri-Fold Deployable Reflector for Communication Satellites

Ozawa, Satoru; Shintate, Kyoji; Tsujihata, Akio

doi:10.2514/6.2011-8022

Cited by 6 publications

(2 citation statements)

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“…In [27], [29] six different rib schemes based on ETS VIII antenna units are discussed and fuzzy comprehensive evaluation method is applied [29] to determine the optimized configuration. Quest to increase aperture and reduce weight has led to design 13m, 14 modules ETS VIII antenna of around 340kg [15], [17] , 30m, 7 modular antenna composed of tri-foldable 4 sided ribs of 250kg [34], [35] and recently 15m aperture antenna of 58kg composed of tri-foldable bifurcated rib tips [36]. However, there is an increase in level of complexity of deployment mechanism with introduction of tri-foldable ribs in design.…”

Section: Background Studymentioning

confidence: 99%

“…Initially, multi-beam, mechanical & measurement technologies were used to construct partially deployable hexa-link truss and tetra trigonal prism [8]. Later, a variety of basic modular units, such as square grid deployable [9]- [11], two types of basic modules with one being able to stow as cylinder & the other to thin plate form [12], [13], quadrilateral ribs with diagonal members for ETS VIII antenna [14]- [33], tri-foldable ribs [34], [35] and tri-foldable with bifurcated rib tips [36] for L-band application, have been proposed to integrate hexagonal reflector with aperture ranging from 1.7m to 30m in diameter. In [27], [29] six different rib schemes based on ETS VIII antenna units are discussed and fuzzy comprehensive evaluation method is applied [29] to determine the optimized configuration.…”

Section: Background Studymentioning

confidence: 99%

See 1 more Smart Citation

Analytical kinematics and trajectory planning of large scale hexagonal modular mesh deployable antenna

Sattar

Wei

2016

MATEC Web Conf.

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Abstract.This investigation aims to analyze the forward kinematics and deployment path of large scale hexagonal modular mesh deployable space antenna employing analytical procedure. At first a comprehensive review of technical contributions from 1987 to date in this class of antenna is completed and least targeted areas are extracted. Based on shortcomings a new design of modular antenna is proposed that has an aperture diameter of 13 meters and is composed of seven modules. Each module possesses an aperture of more than 6 meters and consists of 6 ribs arranged in radial pattern around the central beam. In order to ensure that the antenna will deploy successfully in space conditions, feasibility of design & its stability during deployment; analytical investigation into kinematics & antenna trajectory is carried out using loop closure equations and homogeneous coordinate transformation method. The concept of virtual link is introduced to develop formulations that will help to determine position, velocity and acceleration of each revolute joint in the rib with any small increment in linear motion of slider from top to bottom of central beam. The proposed solution techniques will help to replace time consuming and costly iterations for design, build more economical structure, reduce antenna manufacture time and reduce weight leading to reduced launch as well as experimentation costs before launch.

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