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A New Mesh Ring Deployable Antenna Truss Structure

A truss structure and ring-shaped technology, applied in the direction of antennas, folded antennas, electrical components, etc., can solve the problems of reducing the height of the ring truss, the low storage of the expandable structure, and the limited opening diameter of the expandable antenna, so as to eliminate the risk of cold welding , Reduce the effect of contact friction

Active Publication Date: 2021-01-26
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the opening diameter of the current spatial mesh ring-shaped deployable antenna is limited and the storage of the deployable structure is relatively low. And reduce the retracted diameter of the ring truss, thereby significantly reducing the retracted volume of the spaceborne antenna, improving the storage ratio, and increasing the aperture of the antenna

Method used

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  • A New Mesh Ring Deployable Antenna Truss Structure
  • A New Mesh Ring Deployable Antenna Truss Structure
  • A New Mesh Ring Deployable Antenna Truss Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a novel spatial annular deployable antenna truss structure, the structure of which includes multiple image 3 In the shown unit, adjacent units are connected to form a closed ring structure through the first lower synchronous rod link joint (19) and the second rigid frame rod joint (20); one of the structural units includes the first rigid frame Bar (6), the second rigid frame bar (10), the first upper synchronous bar (2), the second upper synchronous bar (24), the first lower synchronous bar (12), the second lower synchronous bar (15), The first connecting rod (5), the second connecting rod (22), the first telescopic rod group (3), the second telescopic rod group (14), the first rigid frame rod joint (8), the second rigid frame Rod joint (20), an upper synchronization rod joint (1), a lower synchronization rod joint (13), the first rigid frame rod upper synchronization rod hinged joint (7), the second rigid frame rod upper synchronization rod h...

Embodiment 2

[0049] On the basis of Example 1, the mechanism adopts the joint driving method of torsion spring and cable to drive and unfold. Such as Figure 7 Shown, torsion spring is installed in first rigid frame bar_upper synchronous bar articulated joint (7), second rigid frame bar_upper synchronous bar articulated joint (9). Taking the hinged joint (7) of the first rigid frame bar_upper synchronizing bar as an example, one end of the torsion spring (7-3) is fixed inside the first upper synchronizing bar (2), and the other end is fixed on the fixed connecting shaft (7-5) Above, when the mechanism is in the retracted state, the torsion spring is curled and shrunk on the fixed connection shaft (7-5), storing elastic potential energy. In the early stage of mechanism deployment, the elastic potential energy stored in the torsion spring (7-3) is used to drive the mechanism to cross the dead point position. Afterwards, the motor winds up the cable and stretches the diagonal of the hinged f...

Embodiment 3

[0056] On the basis of Example 1, the entire ring-shaped deployable truss structure can be obtained. Figure 11 It is a schematic diagram of the meshed ring truss of the present invention in a fully folded state, Figure 12 It is a schematic diagram of the intermediate state of the meshed ring truss of the present invention, Figure 13 It is a schematic diagram of the mesh ring truss fully expanded state of the present invention.

[0057] use Figure 13 Ring truss, taking a ring-shaped expandable truss composed of 18 units as an example, the expanded diameter is 5000mm, the folded diameter is 924.21mm, the expanded height is 981.25mm, and the folded height is 774.98mm; considering joints, rods, and wire mesh As well as the quality of the flexible cable net, the overall mass of the antenna is about 21.422kg, and the calculated surface density is about 1.091kg / m 2 , compared with the same type of antenna, its diameter storage ratio has been improved, the height storage ratio ...

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Abstract

The invention belongs to the field of space-borne deployable antennas, and specifically provides a novel mesh ring-shaped deployable antenna truss structure. The structure is composed of a plurality of identical units, and the adjacent units are connected by the hinged joints of the upper synchronous rod connecting rods and the joints of the rigid frame rods to form a closed ring structure. Each structural unit includes two rigid frame rods, two upper synchronous rods, two lower synchronous rods, two connecting rods, two pairs of telescopic rods, two rigid frame rod joints, one upper synchronous rod joint, one lower synchronous Rod joints, two rigid frame rods_upper synchronous rod hinged joints, two rigid frame rods_lower synchronized rod hinged joints, two upper synchronized rods_connecting rod hinged joints, two lower synchronized rods_connecting rod hinged joints. The structure is divided into three layers along the radial direction, and adopts the asymmetrical design method up and down to make full use of the folded volume space. Compared with similar mesh unfolded antennas, its height and diameter storage ratio are significantly improved, so as to achieve the same folded requirements. , to increase the deployment aperture of the antenna.

Description

technical field [0001] The invention belongs to the field of space-borne deployable antennas, and in particular relates to a novel mesh ring-shaped deployable antenna truss structure. Background technique [0002] With the continuous advancement of space detection technology, the technical requirements for large spaceborne antennas are also getting higher and higher. Loop deployable antenna is an ideal structural form of large spaceborne deployable antenna due to its advantages of large aperture, light weight, high precision, and high storage ratio. [0003] However, the space of the launch vehicle is limited, so the smaller the storage volume of the antenna, the better. That is, for antennas with the same deployment diameter and deployment height, the smaller the retracted diameter and storage height of the antenna, the better. The ring-shaped deployable truss is used as the supporting structure of the entire spaceborne antenna. The folded diameter and height of the struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/16H01Q1/08
CPCH01Q15/161
Inventor 孙梓涵张逸群杨东武董波丁延康曹鹏赵泽
Owner XIDIAN UNIV
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