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Low-expansion mesh reflector using composite material connectors

A technology of composite materials and connectors, applied in the direction of electrical components, antennas, etc., can solve the problems of large reflector mass and large thermal deformation in space, and achieve the effects of high light transmittance, small thermal expansion coefficient, and high specific stiffness

Active Publication Date: 2013-01-16
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of traditional reflectors with large mass and large thermal deformation in space, and provide a low-expansion mesh reflector using composite material connectors

Method used

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  • Low-expansion mesh reflector using composite material connectors

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Embodiment

[0018] A low-expansion mesh reflector using a composite material connector, including a back rib 1, a reflective surface 2, a connector 3, and a connector embedded part 4; the reflective surface 2 is a quasi-isotropic TWF fabric reflective surface, and the back rib 1 is a composite The back rib of the material laminate is in the shape of a "well" and has a symmetrical structure; the connector 3 is located at the angle between the two intersecting ribs in the back rib 1, so that the connector 3 is fixedly connected to the two intersecting ribs; the connection Part 3 is a hollow hexahedron cylinder with a bottom surface, and the cross-section of the cylinder is a hexagon, wherein the length of three sides is long, and the length of the other three sides is short; the sides of the three sides that are not adjacent The lengths are the same, and the lengths of the three non-adjacent sides are the same; there is a trapezoidal groove on the surface corresponding to one of the long sid...

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Abstract

The invention relates to a low-expansion mesh reflector using composite material connectors and belongs to the technical field of space antenna reflectors. The low-expansion mesh reflector comprises back ribs, reflecting surfaces and connectors. Each refecting surface is a quasi-isotropic TWF (true wave fiber) fabric reflecting surface, and each back rib is a composite material laminate back rib in a groined shape and having a symmetrical structure. Each connector is positioned at an included angle of two crossed back ribs in the back ribs, so that the connector and the two crossed back ribs are fixedly connected. A connector embedded part is positioned on a bottom face of the connector, and the reflector is fixed or mounted by the connector embedded part so as to be convenient for transportation or storage. The reflecting surface in the low-expansion mesh reflector uses the quasi-isotropic TWF fabric, has quite high light-transmittance and a lower thermal expansivity, influence of space light pressure to a molded surface of the reflecting surface can be effectively reduced, temperature gradient generated by the reflecting surface under a space thermal environment can be lowered, and since the temperature gradient is lowered, thermal deformation of the reflecting surface can be reduced.

Description

technical field [0001] The invention relates to a low-expansion mesh reflector using composite material connectors, and belongs to the technical field of space antenna reflectors. Background technique [0002] At present, with the rapid development of space technology, space antenna technology, which is an important payload of spacecraft, has also made great progress. There are more and more types of antennas and more and more complex structures. The reflector antenna has gradually developed into an antenna with a deployable reflector that can be deployed in space, and the antenna reflector is required to have small mass, high rigidity and strength, and small thermal deformation in space. The traditional antenna reflector form can no longer meet the requirements of the reflector with small mass, high stiffness and strength, and small thermal deformation in space. It is necessary to design a reflector structure with small mass, high stiffness and strength, and small thermal d...

Claims

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Application Information

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IPC IPC(8): H01Q15/14
Inventor 高博丁辉兵牛宝华于新战梁云罗耀辉王耀霆王波肖志伟
Owner XIAN INSTITUE OF SPACE RADIO TECH
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