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Large-scale deployable reflective surface based on centrally deformed truss with external winding ribs

A reflective surface and truss technology, applied to antennas, electrical components, etc., can solve the problems of low deployment reliability, large deployment area, and small folded volume, and achieve the effect of strong deployment reliability, large unfolded area, and small folded volume

Active Publication Date: 2019-11-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Compared with the prior art, the beneficial effect of the present invention is: the present invention optimizes the combination and improvement of the traditional surrounding truss stretched mesh reflective surface and the winding rib unfolded reflective surface to complement each other's advantages. The partition design solves the problem that the truss height design of the surrounding truss stretched mesh reflector is too large due to the limitation of the launch volume, and the problem of excessive length of the mechanical arm between the central body of the reflective surface and the satellite body caused by the winding ribs. The problem of low deployment reliability, the folded volume is small, the unfolded area is large, has the advantage of a high surface-to-mass ratio, the deployment reliability is strong, and the occlusion effect is eliminated at the same time

Method used

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  • Large-scale deployable reflective surface based on centrally deformed truss with external winding ribs
  • Large-scale deployable reflective surface based on centrally deformed truss with external winding ribs
  • Large-scale deployable reflective surface based on centrally deformed truss with external winding ribs

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specific Embodiment approach 1

[0011] Specific implementation mode one: as Figure 1~Figure 4 As shown, the present invention discloses a large-scale expandable reflective surface based on a centrally deformed truss with external winding ribs, including a centrally deformed truss 1, a reflective surface 3, a tensioned back net 4, a support arm 6, a feed source 7, and multiple bifurcated ribs 2 and a plurality of shape-controlling adjustment cables 5, the central deformation truss 1 is a regular polygonal truss composed of an even number of rectangular frame units 1-1 sharing short sides, and the plurality of bifurcated ribs 2 are all symmetrical bifurcations The variable cross-section thin plate, the front edge of each of the bifurcated ribs 2 and the central deformation truss 1 corresponding to the rectangular frame unit 1-1 short side columns are connected by hinges, and the reflective surface 3 is a geometric deflection paraboloid, The central area of ​​the back of the reflective surface 3 is connected t...

specific Embodiment approach 2

[0012] Specific implementation mode two: as figure 2 As shown, this embodiment is a further description of specific embodiment 1. The central deformation truss 1 is composed of a plurality of vertical rectangular frame units 1-1 sharing short side columns to form a regular polygonal prism, and each of the The two long sides of the rectangular frame unit 1-1 are horizontally arranged elongated sheets, and the two short sides of each rectangular frame unit 1-1 are vertically arranged cylinders, and each rectangular frame unit 1 The four corners of -1 are fixed with torsion springs, and each rectangular frame unit 1-1 is fixed with elongated thin strips 1-2 at one diagonal. The central deformation truss 1 can be folded in the center through the first centripetal folding. The two long rods of each rectangular frame unit 1-1 are in the shape of long strips. One diagonal line of each rectangular frame unit 1-1 There are long thin laths 1-2 for stabilizing the rectangular frame uni...

specific Embodiment approach 3

[0013] Specific implementation mode three: as figure 2 As shown, this embodiment is a further description of Embodiment 1. Each of the bifurcated ribs 2 includes a main rib 2-1 and two symmetrically bifurcated secondary ribs 2-2. The two sides of the central position of the main rib 2-1 are respectively connected with the front plate edge of a secondary rib 2-2 through leaf springs to form an acute angle integrated fiber connection. The leaf spring can expand the bifurcated secondary ribs 2-2 to a specified angle.

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Abstract

The invention is a large-scale deployable reflection plane based on a centrally-deformed truss's externally connected and wound rib, which relates to the technical field of large-scale wound-rib-type expandable parabolic antennas. The centrally-deformed truss is a regular polygon shape truss. The front edge of each bifurcated rib is connected to the short side column corresponding to the centrally-deformed truss through chains. The geometric structure of the reflection plane is a partial feeding parabolic plane. The central area on the back plane in the normal direction of the reflection plane and the tensioned back mesh supported by the deformed truss are formed in shape. The parts outside the central area are fixedly connected with the lower plate edges of a plurality of symmetrical bifurcated ribs. The tensioned back mesh is connected with the reflection plane through a plurality of shape controlling and adjusting ropes. One end of the support arm is articulated with the junction point of the upper edge short column of the centrally-deformed truss and the other end of the support arm is articulated with a satellite main body. The feed source at the focusing point of the parabolic plane corresponds to the reflection plane, and the feed source is fixedly mounted on the satellite main body through a waveguide tube. According to the invention, through the use of an integrated structure, very highly image quality comparative edge can be achieved, and the expansion is very reliable, and at the same time, the blocking effect is eliminated.

Description

technical field [0001] The invention relates to the technical field of large-scale winding rib-type deployed parabolic antennas, in particular to a large-scale deployable reflective surface based on a centrally deformed truss and circumscribed winding ribs. Background technique [0002] Today, with the rapid development of aerospace technology, how to combine reflectors and satellites more effectively has always been a problem that researchers in the aerospace field attach great importance to. The reflective surface of the surrounding truss stretched mesh and the expanded reflective surface of the winding rib are two common reflective surfaces at present, and both of them have their own defects. The truss height design of the reflective surface of the surrounding truss stretched mesh is limited by the launch volume, requiring the height of the surrounding truss to be greater than the height of the fairing of the launch vehicle, which takes up a lot of space. However, the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14
CPCH01Q15/14
Inventor 卫剑征甄铎谭惠丰丁海鑫林国昌谢志民
Owner HARBIN INST OF TECH
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