Large-scale expandable reflection plane based on centrally-deformed truss's externally connected and wound rib

Abstract

The invention is a large-scale deployable reflection plane based on a centrally-deformed truss's externally connected and wound rib, which relates to the technical field of large-scale wound-rib-type expandable parabolic antennas. The centrally-deformed truss is a regular polygon shape truss. The front edge of each bifurcated rib is connected to the short side column corresponding to the centrally-deformed truss through chains. The geometric structure of the reflection plane is a partial feeding parabolic plane. The central area on the back plane in the normal direction of the reflection plane and the tensioned back mesh supported by the deformed truss are formed in shape. The parts outside the central area are fixedly connected with the lower plate edges of a plurality of symmetrical bifurcated ribs. The tensioned back mesh is connected with the reflection plane through a plurality of shape controlling and adjusting ropes. One end of the support arm is articulated with the junction point of the upper edge short column of the centrally-deformed truss and the other end of the support arm is articulated with a satellite main body. The feed source at the focusing point of the parabolic plane corresponds to the reflection plane, and the feed source is fixedly mounted on the satellite main body through a waveguide tube. According to the invention, through the use of an integrated structure, very highly image quality comparative edge can be achieved, and the expansion is very reliable, and at the same time, the blocking effect is eliminated.

Description

technical field [0001] The invention relates to the technical field of large-scale winding rib-type deployed parabolic antennas, in particular to a large-scale deployable reflective surface based on a centrally deformed truss and circumscribed winding ribs. Background technique [0002] Today, with the rapid development of aerospace technology, how to combine reflectors and satellites more effectively has always been a problem that researchers in the aerospace field attach great importance to. The reflective surface of the surrounding truss stretched mesh and the expanded reflective surface of the winding rib are two common reflective surfaces at present, and both of them have their own defects. The truss height design of the reflective surface of the surrounding truss stretched mesh is limited by the launch volume, requiring the height of the surrounding truss to be greater than the height of the fairing of the launch vehicle, which takes up a lot of space. However, the su...

AI Technical Summary

Problems solved by technology

[0005] Compared with the prior art, the beneficial effect of the present invention is: the present invention optimizes the combination and improvement of the traditional surrounding truss stretched mesh reflective surface and the winding rib unfolded reflective surface to complement each other's advantages. The partition design solves the problem that the truss height design of the surrounding truss stretched mesh reflector is too large due to the limitation of the launch volume, and the problem of excessive length of the mechanical arm between the central body of the reflective surface and the satellite body caused by the winding ribs. The problem of low deployment reliability, the folded volume is small, the unfolded area is large, has the advantage of a high surface-to-mass ratio, the deployment reliability is strong, and the occlusion effect is eliminated at the same time

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