International Space Station (ISS) Roll-Out Solar Array (ROSA) Spaceflight Experiment Mission and Results

Spence, Brian; White, Steve; LaPointe, Matt; Kiefer, Steve; LaCorte, Peter; Banik, Jeremy; Chapman, David C.; Merrill, John M.

doi:10.1109/pvsc.2018.8548030

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…The relatively small mass of a small spacecraft in the presence of large elastic elements in its composition is the reason for the significant influence of oscillations of elastic elements on the orbital motion of the spacecraft. Tests of promising new ROSA solar panels on the international space station [15,16] confirmed the seriousness of this problem. Periodic immersion of a small spacecraft in the shadow of the Earth and exit from it contribute to the occurrence of temperature shock.…”

Section: Introductionmentioning

confidence: 84%

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Modeling the deformation of an elastic element of a small spacecraft in its plane during temperature shock

2023

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A basic mathematical model of the deformation of a large elastic element of a small spacecraft in its plane is constructed. Deformations are caused by a temperature shock after a small spacecraft leaves the Earth’s shadow on the solar portion of the orbit. The model is used to conduct a computational experiment with the aim of assessing perturbations acting on a small spacecraft due to temperature shock. The temperature distribution during thermal shock is described by a one-dimensional model of thermal conductivity. The classical theory of thin plates is used to determine the deformations. The results of the estimation of disturbing factors are obtained as a result of a computational experiment for a model small spacecraft. These results indicate the need to compensate for the impact of temperature shock for small technological spacecraft. The data obtained can be used in the design of small space-craft for technological purposes.

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Section: Introductionmentioning

confidence: 84%

“…5 shows the distribution of the elementary volumetric force dN acting on each point of the elastic element to the left of the line 2 / a x = . It is the same for each point and, according to [15,16], is equal to:…”

Section: Point X Coordinate Y Coordinatementioning

confidence: 99%

Modeling the deformation of an elastic element of a small spacecraft in its plane during temperature shock

2023

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“…The recent Roll-Out Solar Array (ROSA) flight demonstration [16], flown in 2018 by AFRL, consisted of a flexible blanket containing solar cells and supported by two thin-shell composite slit tubes. The 5.4 m × 1.7 m array was initially coiled in a cylindrical configuration, and then self-deployed by the controlled release of elastic strain energy in the deployable booms.…”

Section: Introductionmentioning

confidence: 99%

Deployment Dynamics of Foldable Thin Shell Space Structures

Pedivellano

Pellegrino

2021

AIAA Scitech 2021 Forum

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This paper investigates the deployment behavior of lightweight flexible space structures consisting of thin shell components. An extensive and detailed study of a symmetrically folded structure that dynamically deploys by releasing its stored elastic energy is presented. The challenges involved with ground testing of this structure are discussed, and a suspension system that allows propagation of the elastic folds is proposed. The dynamics of two 1 m-scale structural prototypes was measured using high-speed Digital Image Correlation. It is shown that, for the tests considered, the elastic folds remain stationary and behave as elastic hinges, resulting in a symmetric and repeatable deployment. Deployment experiments in air and vacuum showed that air mass significantly affects the dynamics of the structure, slowing its deployment by 70 %. However, this effect becomes negligible if the deployable structure is not covered by a film. A finite element model of the deployment is presented. The effects of air are approximated by an added mass to the structure, calculated through simple geometric arguments. This model shows good agreement with experimental results without increasing the associated computational time.

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“…Figure 1 shows ReachBot navigating around a space station. Extendable booms have traditionally been used in space for deployable structures, such as solar sails [6], telescope membranes [7], or solar panels [8]. These booms are ideal for space applications because their composite triangular or slit-tube structure keeps them lightweight and compact when rolled up, while still being strong in tension and capable of extending many meters, particularly in reduced gravity.…”

Section: Introductionmentioning

confidence: 99%