Three-layer flexible sleeve expandable antenna

Abstract

The invention discloses a three-layer flexible sleeve expandable antenna, which is composed of an antenna sleeve, a driving mechanism, a push-and-pull mechanism and a positioning mechanism, wherein the driving mechanism drives the push-and-pull mechanism, so that the antenna sleeve is unfolded and retracted, and the positioning mechanism plays a role in positioning and locking after the sleeve isunfolded; the outer layer sleeve, the middle layer sleeve and the inner layer sleeve of the antenna sleeve are of a three-layer nested cable net structure, wherein the inner layer sleeve is an antenna, and the middle layer sleeve and the outer layer sleeve are of a supporting structure; the outer layer sleeve supports the middle layer sleeve, the middle layer sleeve supports the inner layer sleeve, and the outer layer sleeve, the middle layer sleeve and the inner layer sleeve are sequentially stretched and unfolded; the driving mechanism adopts an axial spiral movement mode and can move in thesleeve, so that the extension length of the sleeve antenna is increased; the push-and-pull mechanism enables the antenna to be retracted after being unfolded; the positioning mechanism enables the relative positions among the multiple layers of sleeves be accurately locked without relative movement, and vibration is reduced. The sleeve expandable antenna has the characteristics of being light inweight, high in unfolding precision, large in antenna stretching and unfolding length and convenient to recycle.

Description

technical field [0001] The invention relates to the technical field of satellite antenna structure design, in particular to a three-layer flexible sleeve extendable antenna. Background technique [0002] Since the invention of the spacecraft, the size and quality of its components have been continuously optimized, especially in terms of deployable mechanisms. The expandable mechanism is a new type of space structure born in the 1960s and gradually developed. It has two structural states: fully folded or fully unfolded. Usually, during transportation, it is in a folded state, and at this time, the structure volume is small, which is convenient for storage or transportation. When it needs to be used, the expandable mechanism gradually expands through the driving device under the action of external driving force, and reaches a fully expanded working state. [0003] In the field of aerospace, the space and carrying capacity of the launch vehicle's load compartment are limited,...

AI Technical Summary

Problems solved by technology

The above three structural methods all limit the length of the protruding sleeve, and it is difficult to retract after protruding

[0005] Invention patent CN201611101388 discloses "a sleeve-type satellite antenna". The antenna has a three-layer sleeve structure. The sleeve extension method used is to rely on springs to eject the middle sleeve and the inner sleeve sequentially, but it is not designed to shrink Way

In addition, the sleeve-type satellite antenna uses a spring set outside the outer sleeve as the driving force, which limits the diameter and total extension length of the sleeve antenna; the deployment locking mechanism used is suitable for rigid sleeve antennas, and for flexible cable-net sleeves The barrel antenna is not suitable, thus affecting the extension performance of the antenna

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