Shape reconstruction of planar flexible spacecraft structures using distributed sun sensors

Talon, Thibaud; Chen, Yulu Luke; Pellegrino, Sergio

doi:10.1016/j.actaastro.2020.12.056

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…[43,44] In this case, the frequency reconfiguration can be leveraged for cognitive radio applications [48] or to obtain feedback on the shape of a large flexible space structure. [49] In this work, we demonstrated the potential of mechanical metamaterials to act as versatile stretchable conductors and dielectrics in physically reconfigurable antenna systems. Since the large achievable stretching is enabled by the metamaterial geometry and does not require high strain materials, the concept has been applied to materials with very different moduli ranging from relatively soft TPU to a stiff glass fiber composite.…”

Section: Discussionmentioning

confidence: 92%

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Electromagnetic Reconfiguration Using Stretchable Mechanical Metamaterials

2023

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Response to environmental thermomechanical inputs in applications that range from wearable electronics to aerospace structures necessitates agile communication systems driven by reconfigurable electromagnetic structures. Antennas in these systems must dynamically preserve acceptable radiation characteristics while enabling on-demand performance reconfiguration. However, existing reconfiguration mechanisms through stretchable conductors rely on high-strain behavior in soft substrates, which limits their applicability. Herein, this work demonstrates the use of mechanical metamaterials for stretchable conductors and dielectrics in antennas. Metamaterials allow conductor stretching up to 30% with substrate base material tensile moduli ranging from 26 MPa to 44 GPa. It is shown, through several antenna designs, that mechanical metamaterials enable similar frequency reduction upon stretching as monolithic conductors, while simultaneously providing a miniaturization effect. The conductor patterning, furthermore, provides control over coupling between mechanical stretching and electromagnetic reconfiguration. This approach enables designing reconfigurable antenna functionality through metamaterial geometry in response to arising needs in applications ranging from body-adapted electronics to space vehicles.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Electromagnetic Reconfiguration Using Stretchable Mechanical Metamaterials

2023

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“…They are more mass, power, and volume efficient when compared to traditional externally mounted camera arrays while not being sensitive to external lighting conditions. 17,18 FBGs allow for thousands of distributed point strain measurements along a single optical fiber, 19 which provides ease of scalability with the large size of space structures. Some work has even been done that leverages neural networks to extrapolate 3D displacements of a radio-frequency antenna panel from arrays of 1D FBG strains.…”

Section: Introductionmentioning

confidence: 99%

Dynamic deployment sensing of thin-shell composite structures with fiber Bragg gratings

Daye,

Marashi,

Lee

et al. 2024

Health Monitoring of Structural and Biological Systems XVIII

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The efficacy of using Fiber-Bragg Grating (FBG) sensors for the purpose of sensing and characterizing dynamic deployment of bistable composite tape springs is investigated in this paper. Ultra-thin composite structures such as tape springs have seen increased popularity in spacecraft structures due to enabling the precise deployment of flexible solar arrays, sails, reflectors, and antennas. These composite members can elastically transition from either the coiled or folded state to the deployed extended state while possessing superior stiffness, thermal properties, mass efficiency, and compactness when compared to their metal counterparts. Bistability is leveraged to influence more controllable self-deployment and energy efficient stowage, while reducing or eliminating the need for mechanical restraints or motorized deployment. However, a need exists to monitor both the deployment dynamics and overall structural health of the deployed member. Fiber optic sensors such as FBGs have the capability to sense pressure, temperature, and mechanical strain. Due to their relative thinness, low mass, and flexibility, fiber optics may be integrated into these deployable composite structures without significantly interfering with bistability, packaging, or deployability. This paper experimentally demonstrates dynamic strain sensing of deploying bistable composite tape springs via the integration of fiber optics containing FBG sensors. Free deployment from both coiled and folded stowed configurations are characterized.

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Inextensible Surface Reconstruction Under Small Relative Deformations from Distributed Angle Measurements

Talon¹,

Pellegrino

2022

Int J Comput Vis

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Shape reconstruction of planar flexible spacecraft structures using distributed sun sensors

Cited by 6 publications

References 21 publications

Electromagnetic Reconfiguration Using Stretchable Mechanical Metamaterials

Electromagnetic Reconfiguration Using Stretchable Mechanical Metamaterials

Dynamic deployment sensing of thin-shell composite structures with fiber Bragg gratings

Inextensible Surface Reconstruction Under Small Relative Deformations from Distributed Angle Measurements

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