Complete scissor-like double-layer annular truss extendible antenna mechanism

Abstract

The present invention provides a complete scissor-like double-layer annular truss extendible antenna mechanism. The mechanism comprises an inner layer annular truss component, an outer layer annular truss component and N inner and outer layer connection truss components; the inner layer annular truss component and the outer layer annular truss component both include N extending units; two common flower discs are connected between adjacent extending units; the inner and outer layer connection truss components are concentrically arranged; two upper and lower flower discs at each side of the inner layer extending units are connected with the corresponding two upper and lower outer layer flower discs at each side of the outer side layer extending units respectively through one inner and outer layer connection truss component to form a double-layer annular truss; and the distance between the length of the rod pieces at the same position of the inner and outer layer extending units and a flower disc rotation secondary axis and a center line satisfies a special proportional relation, and the ratio of the inner layer and the outer layer is (1-sin(180 / N)) / (1+sin(180 / N)). The complete scissor-like double-layer annular truss extendible antenna mechanism is high in rigidity, simple in structure and high in reliability, and can be applicable to a communication satellite, a space station and a space probe.

Description

technical field [0001] The invention relates to a deployable antenna mechanism. Background technique [0002] The space folding mechanism can be applied to communication satellite platforms, space stations, space telescopes, aerospace vehicles and other spacecraft, and has a good application prospect, and has become one of the research hotspots in the aerospace field. An important application of the large-scale space deployment mechanism in the aerospace field is as a deployment and support mechanism for large-aperture antennas. Currently, the large-aperture space-deployable antennas that have been successfully developed mainly include expandable rib antennas, frame-type deployable antennas, and ring-cylindrical deployable antennas. Deployable Antennas and Ring Truss Deployable Antennas. [0003] The ring truss-type deployable antenna has the characteristics of large folding ratio, small mass, and the mass does not increase proportionally with the increase of the aperture. ...

AI Technical Summary

Problems solved by technology

[0004] Although researchers from various countries have done a lot of research on the ring truss antenna mechanism, there are few types of the existing ring truss mechanism, and with the increase of the antenna diameter, the antenna stiffness drops more seriously. Some ring truss deployable antennas use tension The zipper improves the overall rigidity of the antenna mechanism, but the tensioning of the zipper is more complicated and difficult to control, which also reduces the reliability of the overall structure. During the unfolding process, it is very easy to entangle, which makes the ring truss antenna fail to unfold, causing huge economic losses.

Images