Optimal surface profile design of deployable mesh reflectors via a force density strategy

Deng, Yang; Liu, Jingsheng; Zhang, Yiqun; Zhang, Shuxin

doi:10.1016/j.actaastro.2016.10.008

Cited by 24 publications

(7 citation statements)

References 14 publications

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“…where ρ c and L c are the mass density and element length vector of the cables, respectively. According to (9), if the initial equilibrium state of the cable net structure is given, i.e., L c and T c are given, m c can be regarded as a unary function of λ A . Consequently, by fixing the total mass of the cables, λ A can be uniquely determined as…”

Section: B Mechanical-thermal Matching Model For Cable Net Structuresmentioning

confidence: 99%

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Surface Shape Stability Design of Mesh Reflector Antennas Considering Space Thermal Effects

et al. 2020

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On-orbit periodic thermal loads degrade the reflector surface accuracy of AstroMesh antennas. To address this problem, a surface shape stability design method is proposed to passively pre-control the on-orbit thermal deformation of mesh reflectors, in which the structural parameters are properly designed to make the internal forces of the whole structure change coordinately and the surface shape of cable-mesh antennas insensitive to thermal loads. First, mathematical models of mechanical-thermal matching (MTM) are established for AstroMesh reflectors, in which an MTM model is developed for the cable net structure and the reflector membrane is equivalent to a cable net structure according to the force balance and thermal deformation coordination relationships. Then, based on the mathematical models, a surface shape stability design strategy is presented for AstroMesh antennas to properly design the cross-sectional dimensions of the cables. Finally, typical AstroMesh reflector structures are designed using the proposed method and simulation results show that the thermal deformations of the obtained AstroMesh reflectors are quite small under the whole temperature range. INDEX TERMS Mesh reflector antennas, thermal loads, surface shape stability, mechanical-thermal Matching (MTM).

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Section: B Mechanical-thermal Matching Model For Cable Net Structuresmentioning

confidence: 99%

“…On one hand, the initial surface accuracy is determined by the configuration of the mesh reflector. Many researchers, such as Tibert [6], Shi et al [7], Morterolle et al [8], Yang et al [9]- [11], have researched the configuration design methods of mesh reflectors and obtained…”

Section: Introduction a Motivationmentioning

confidence: 99%

Surface Shape Stability Design of Mesh Reflector Antennas Considering Space Thermal Effects

et al. 2020

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“…According to the existing studies, the surface accuracy of these antennas usually stays at the millimeter level [ 1 , 11 , 12 , 13 , 14 , 15 , 16 ], corresponding to the L-S operating frequency band. If adopting various delicate structures (such as an umbrella-type structure [ 17 , 18 , 19 , 20 ]) or sophisticated adjustment approaches [ 11 , 12 , 13 , 16 , 21 , 22 , 23 , 24 ], small-aperture CNAs are capable of achieving an accuracy of 0.3–1 mm, with which its maximum operating frequency can reach the Ka band. However, the requirement for antenna operating frequency has been increasing invariably, which has far exceeded the Ka band, and even increased to the terahertz band.…”

Section: Introductionmentioning

confidence: 99%

Configuration Investigation, Structure Design and Deployment Dynamics of Rigid-Reflector Spaceborne Antenna with Deviation-Angle Panel

Tan,

Liu,

Duan

et al. 2024

Sensors

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Rigid-reflector spaceborne antennas (RRSAs) are well-suited for high-frequency application scenarios due to their high surface accuracy. However, the low stowing efficiency of RRSAs limits the aperture diameters and further deteriorates the electromagnetic (EM) performances in terms of gain, resolution and sensitivity. After conducting systematic feature analysis with respect to several typical RRSAs, we propose a novel type of RRSA to solve the aforementioned problems. Inspired by the pose adjustment process for a higher stowing efficiency of traditional RRSAs, we also propose a new segmentation scheme of a reflective surface consisting of a deviation-angle panel that facilitates a higher stowing efficiency. Based on this scheme, its corresponding folded configuration is implemented by combining Euler’s rotation theorem and the idea of parameter identification. In addition, we also compare the stowing efficiency of different schemes to verify the high stowing efficiency of the configuration. Finally, we perform mechanism/structure design and deployment dynamics to demonstrate that the antenna can be successfully deployed and exhibits excellent deployment quality. The results suggest that the proposed antenna possesses higher stowing efficiency than that of the same kind, with a stable deployment and interference-free process.

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“…The force density method (FDM), [7][8][9] the dynamic relaxation method, [10][11][12] and the nonlinear finite element method are often employed in this research area. The FDM was already used in the form-finding for reflectors by Tanka et al, 13 Morterolle et al, 14 Yang et al, 15 and Maddio et al 16 Yang et al 17 developed an enhanced form-finding approach based on FDM for designing cables with uniform tension. Wang et al 18 elaborated the basic principle of using the dynamic relaxation method for finding the reflector form and validated the practicality of this method with two types of Astromesh reflectors.…”

Section: Introductionmentioning

confidence: 99%

A new source finding and tracking analysis approach for the active reflector of five-hundred-meter aperture spherical telescope

Chen

Zhang

Qian

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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The FAST (Five-hundred-meter Aperture Spherical Telescope) is the world’s largest single-aperture radio telescope. During operation, FAST needs to follow the observed celestial body to adjust displacements, which can be divided into two processes: the source finding and tracking. In this paper, a new numerical method based on Vector Form Intrinsic Finite Element (VFIFE) is proposed to simulate the source finding and tracking process for FAST’s active reflector. The basic principle of static equilibrium and calculation flow of the sourcing and tracking analysis is proposed, and the finite element program is compiled to analyze the displacement process of the reflector cable-net structure. Then, six typical test conditions are selected to simulate the sourcing and tracking displacement process. The obtained final form in the equilibrium state adheres to the target configuration, demonstrating the applicability of the suggested approach and the correctness of calculation findings. In addition, the change in the actuator length and the structural force distribution can be simultaneously derived. These values serve as a vital theoretical foundation for FAST’s practical operation and regulation.

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Optimal surface profile design of deployable mesh reflectors via a force density strategy

Cited by 24 publications

References 14 publications

Surface Shape Stability Design of Mesh Reflector Antennas Considering Space Thermal Effects

Surface Shape Stability Design of Mesh Reflector Antennas Considering Space Thermal Effects

Configuration Investigation, Structure Design and Deployment Dynamics of Rigid-Reflector Spaceborne Antenna with Deviation-Angle Panel

A new source finding and tracking analysis approach for the active reflector of five-hundred-meter aperture spherical telescope

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