A New Design Variant of the Large Deployable Space Reflector

Medzmariashvili, E.; Tserodze, Sh.; Tsignadze, N.; Sanikidze, M.; Datashvili, L.; Sarchimelia, A.; Chkhikvadze, K.; Siradze, N.; Bedukadze, G.

doi:10.1061/40830(188)6

Cited by 10 publications

(5 citation statements)

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“…However, considering the size limitation, if the top ring has too many aliquots, its rod length will be significantly short, which will affect the deployment process. In this paper, we divide the bottom (16) x If the coordinate position of S 1 is determined, the rod length of the bottom ring can be uniquely determined by the similarity of triangles formula: (17) cos…”

Section: Bottom Ring (Top Ring) Designmentioning

confidence: 99%

“…At present, the scissor unit is widely used in various fields of architecture, engineering and machinery with light weight and good mobility [14,15]. The antenna of EGS (Experimental Geodetic Payload) sponsored by NASDA (The National Space Development Agency) is a scissor antenna consisting of a scissor-shaped circular support truss and a rib with tensioned film radiating from a central hub [16]. Bettini et al [17] proposed a new lightweight structure based on the truss structure of a self-expanding scissor antenna with minimal mechanical connections.…”

Section: Introductionmentioning

confidence: 99%

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Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures

Zhao

Liu

et al. 2020

Chin. J. Mech. Eng.

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Space-deployable mechanisms can be used as supporting structures for large-diameter antennas in space engineering. This study proposes a novel method for constructing the surface design of space reflector antennas based on polar scissor units. The concurrency and deployability equations of the space scissor unit with definite surface constraints are derived using the rod and vector methods. Constraint equations of the spatial transformation for space n-edge polar scissor units are summarized. A new closed-loop deployable structure, called the polar scissor deployable antenna (PSDA), is designed by combining planar polar scissor units with spatial polar scissor units. The over-constrained problem is solved by releasing the curve constraint that locates at the end-point of the planar scissor mechanism. Kinematics simulation and error analysis are performed. The results show that the PSDA can effectively fit the paraboloid of revolution. Finally, deployment experiments verify the validity and feasibility of the proposed design method, which provides a new idea for the construction of large space-reflector antennas.

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Section: Bottom Ring (Top Ring) Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures

Zhao

Liu

et al. 2020

Chin. J. Mech. Eng.

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“…In addition to the telescopes mentioned above, antennas also can be deployed in space. Antennas with a diameter of 100 m and larger were designed in the 1970s [15][16][17], as well as other antennas, like Sunflower [18], MEA [18], SSDA [19], and EGS [20]. But they have a paraboloid surface, not suitable for the OAST.…”

Section: Introductionmentioning

confidence: 99%

Design and Preliminary Ground Experiment for Deployable Sunshade Structures of a Modular Space Telescope

Kuang,

Wang,

Gao

et al. 2024

Sensors

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On-orbit assembling space telescope (OAST) is one of the most feasible methods to implement a large-scale space telescope. Unlike a monolithic space telescope (such as Hubble Space Telescope, HST) or a deployable space telescope (such as James Webb Space Telescope, JWST), OAST can be assembled in the spatial environment. To ensure proper telescope performance, OAST must be equipped with a large deployable sunshade. In order to verify the technology of the OAST, the authors propose a modular space telescope on the China Space Station (CSS) and design a deployable sunshade. The deployable mechanism of the sunshade is made up of a radial deployable mechanism and an axial deployable mechanism. The paper describes the overall design approach, the key component technologies, and the design and preliminary testing of a part of the deployable sunshade assembly.

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“…In the field of deployable reflector antennas, modular truss antennas use springs to realize the deployment of antenna elements [13][14] . The ring truss antenna [15][16][17] is generally deployed by the cable running through the truss and uses springs or torsion springs as auxiliary [18][19][20] . Both antennas adopt a cablebeam combination structure to form a deployable tension structure and can achieve a significantly high storage ratio.…”

Section: Introductionmentioning

confidence: 99%

Structural design and performance analysis of a new deployable warhead-like decoy

Quan

Zhang

Sun

et al. 2023

Preprint

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A new deployable warhead-like decoy is proposed in this study. It consists of a rigid deployable skeleton in the center, a cable net system, and a membrane connected to the outer part of the decoy. First, the structural design of the decoy is presented, and its spatial geometry relationship is described. Compared with the existing decoy design, the decoy has high structural stiffness and surface similarity. Furthermore, the large storage ratio ensures that the space it occupies and its weight do not exceed those of the conventional decoy. Then, the structural characteristics and deployment dynamics of the ground and air conditions are analyzed considering the difference between the actual working condition and ground condition. Finally, a prototype is developed to verify the feasibility of the design, and an experimental test is conducted. The test results show that the decoy can be deployed successfully under its passive power and that its structure has good repeatability and surface similarity.

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A New Design Variant of the Large Deployable Space Reflector

Cited by 10 publications

References 0 publications

Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures

Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures

Design and Preliminary Ground Experiment for Deployable Sunshade Structures of a Modular Space Telescope

Structural design and performance analysis of a new deployable warhead-like decoy

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