Novel annular deployable truss structure

Abstract

The invention discloses a novel annular deployable truss structure which consists of a plurality of parallelogram-like unit structures, and the adjacent parallelogram-like unit structures are connected by three-point hinges and five-point hinges to form a closed annular structure. Each parallelogram-like unit structure is composed two vertical rods, two cross bars, two diagonal rods, two five-point hinges and two three-point hinges. The adjacent two parallelogram-like unit structures share one vertical rod, one five-point hinge and one three-point hinge. The upper cross bars, the diagonal rods, the lower cross bars are distributed in three mutual-parallel planes in the horizontal direction, and each bar or rod does not influence others in movement. When the truss is completely folded, each bar or rod is distributed in the vertical direction, so that the folding diameter of the truss is effectively reduced. The vertical rods and the three-point hinges are connected through sliding pairs. When the truss is folded, the three-point hinges can slide in the directions of the vertical rods, and the folding height of the truss is greatly reduced.

Description

technical field [0001] The invention belongs to the field of space-borne deployable antennas, in particular to a novel ring-shaped deployable 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 currently an ideal structural form of large spaceborne antenna because of its advantages of large aperture, light weight, high precision, and high storage rate. [0003] The AM-1 loop deployable antenna of Northrop Grumman Company of the United States has been successfully used in space satellites many times, and it is currently the most advanced spaceborne loop deployable antenna in the world. The circular expandable structure of the AM-1 antenna is generally composed of 30 parallelogram units, and each parallelogram unit has a telescopic sleeve structure arranged along the diagonal direction. By changing t...

AI Technical Summary

Problems solved by technology

like figure 1 As shown in the figure, the horizontal bars and diagonal bars of the parallelogram unit structure are located in the same plane, so when the truss is folded to a certain angle, the horizontal bars and the diagonal bars will collide, resulting in the structure being unable to continue to be folded, and the folded diameter is too large

Secondly, the five-point hinge and the three-point hinge of the AM-1 antenna are connected to the vertical pole with a fixed pair, resulting in a large folding height when the antenna is folded.

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