Morphological Concepts on Efficient Space Structures with Deployable and/or Adaptive Functions

Natori, M. C.; Kishimoto, Naoki; Watanabe, Haruyuki; Higuchi, Ken

doi:10.2514/6.2008-2211

Cited by 12 publications

(10 citation statements)

References 4 publications

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“…Natori proposed the quasi-logarithmic-spiral folding, 7 where the length of the deployed fold line is equal to that of the folded fold line to consider the thickness effects of the folded membrane. Based on the concept of the quasilogarithmic-spiral folding, the deviation of the fold line of the z-fold membrane is examined geometrically.…”

Section: A Geometrical Properties Of Fold Linementioning

confidence: 99%

Fold Line Based on Mechanical Properties of Crease in Wrapping Fold Membrane

Satou

Furuya

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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Folded thickness of a large space membrane is determined based on the mechanical properties of a crease in a wrapping fold to identify a fold line induced by the wrapping fold. Wrapping fold experiments are performed to examine the configuration of fold line in detail. The experimental results indicate that the fold line induced by the wrapping fold deviates from the target straight fold line because the folded thickness is not equal to zero. To determine the folded thickness, the mechanical properties of a crease in the wrapping fold membrane are examined analytically. The folded thickness and the configuration of fold line are identified by the theoretical analysis in terms of the wrapped length of fold line, the tensile force, the membrane thickness, the radius of center hub, and the creasing force applied before wrapping. The results of the theoretical analysis are verified using the experimental results. A fold pattern, which consists of the fold line obtained by the theoretical analysis, is proposed, and the high packaging efficiency is realized by the proposed fold pattern.

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Section: A Geometrical Properties Of Fold Linementioning

confidence: 99%

Fold Line Based on Mechanical Properties of Crease in Wrapping Fold Membrane

Satou

Furuya

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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“…The spiral fold line is set in polar coordinates with the origin at the center of the body, and the membrane is folded by both zigzag folding along the circumferential direction and rolling in the radial direction. Curved membrane straps bounded by folding lines are wound around the center body, and they are slightly bent at each corner 9) . Inflatable tubes are attached to the membrane; these tubes serve as actuators during deployment and as supporting members after deployment.…”

Section: Composition Of Basic Modulementioning

confidence: 99%

“…Inflatable tubes are also made up of membranes, and the combined use of membranes with cable networks is effective 7) . A hexagonal flat structural element is important as the basic module for future large hierarchical modular space structure systems 8) , and a hexagonal membrane element can be folded spirally around its center (spiral folding), even if the membrane is thick 9) . It would be possible to realize a large space structure system on a scale of hundreds of meters by using both automatic erectable construction and deployable construction with hexagonal deployable membrane modules 10) .…”

Section: Introductionmentioning

confidence: 99%

Models of Membrane Space Structures with Inflatable Tubes

Katsumata

Fujii

Natori

et al. 2010

AEROSPACE TECHNOLOGY JAPAN

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Three models of deployable membrane space structures consisting of a membrane, inflatable tubes, and connective cable networks are investigated with the aim of developing suitable modules for future hierarchical modular space structure systems on a scale of hundreds of meters. To a flat spirally folded membrane, inflatable tubes are attached in the circumferential direction, the radial direction, or both. Deployment experiments on laboratory-scale hand-made conceptual models are carried out, and their details are presented. The deployment of inflatable tubes in three different folding patterns is also studied, and smooth deployment of the tube in a modified zigzag folding pattern is demonstrated.

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“…Deployment experiments of hexagonal membranes with spiral folding (10), (11) are conducted. The spiral folding is used as a test case for the study of centrifugally deployed membranes.…”

Section: Folding Methods and Membrane Modelsmentioning

confidence: 99%

“…It will be preferable to take account of them properly to improve the accuracy. In this paper, centrifugal deployment dynamics of hexagonal membranes stowed with spiral folding (10), (11) are studied. Ground experiments are conducted in a vacuum chamber using small-scale membranes to observe deployment dynamics under a constant rotation speed.…”

Section: Introductionmentioning

confidence: 99%

Centrifugal Deployment of Membrane with Spiral Folding: Experiment and Simulation

Okuizumi

Yamamoto

2009

JSE

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Centrifugal deployment dynamics of hexagonal membranes stowed with spiral folding are investigated. The centrifugal deployment has a possibility of unfolding large membranes without using extendable masts. Understanding and predicting the deployment dynamics are important to realize large membrane space structures. In this paper, deployment experiments of hexagonal membranes with coarse and fine spiral folding patterns are conducted in vacuum under gravity. Numerical simulations of the centrifugal deployments are also performed employing spring-mass system which models in-plane stiffness of thin membranes and enables fast numerical analysis. Additional modelings taking accounts of buckling, creases, air drag and damping are applied to the spring-mass system model. The experimental and numerical results are compared to examine the characteristics of the deployment dynamics and the validity of the numerical simulation.

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Morphological Concepts on Efficient Space Structures with Deployable and/or Adaptive Functions

Cited by 12 publications

References 4 publications

Fold Line Based on Mechanical Properties of Crease in Wrapping Fold Membrane

Fold Line Based on Mechanical Properties of Crease in Wrapping Fold Membrane

Models of Membrane Space Structures with Inflatable Tubes

Centrifugal Deployment of Membrane with Spiral Folding: Experiment and Simulation

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