A Deployable High Precision Solid Surface Reflector Antenna

Abstract

The invention discloses an unfoldable and high-accuracy fixed-surface reflector antenna. The unfoldable and high-accuracy fixed-surface reflector antenna is characterized by comprising a feeding source and support system, a central round disc, a satellite connection central cylinder, a plurality of fan-sheet reflection panels, support chain rods, plate end constraint connection posts, inner-ring single-way hinges, outer-ring single-way hinges and pull springs, wherein the plurality of fan-shaped reflection panels are equal in circumference, the feeding source and support system and the satellite connection central cylinder are respectively and fixedly connected to two sides of the central round disc, the central round disc, the support chain rods, and the fan-sheet reflection panels are connected with the outer-ring single-way hinges via the inner-ring single-way hinges, the plate end constraint connection posts are riveted at two sides of end parts of the fan-sheet reflection panels,and the plate end constraint connection posts of adjacent fan sheets are connected via the pull spring. The unfoldable and high-accuracy fixed-surface reflector antenna can be applicable to actual engineering of an aerospace craft requiring a high-accuracy and large-aperture reflector antenna, and has favorable storage ratio, integral stability and dynamic performance. The unfoldable and high-accuracy fixed-surface reflector antenna is light in structure, simple in form, flexible in design and wide in application and has favorable military and civil market prospect.

Description

technical field [0001] The invention relates to the related technical field of aerospace vehicle structure engineering, in particular to a deployable high-precision solid-surface reflector antenna. Background technique [0002] The space expandable structure is widely used in the actual engineering of aerospace vehicles to meet the requirements of light weight, high storage ratio and actual working performance, so as to ensure that the spacecraft structure is stored in a small fairing space during the launch phase of the launch vehicle and enters orbit. After that, it can be successfully unfolded and formed into the working state. The reflector antenna is an important part of the aerospace vehicle, because it is necessary to obtain higher gain by improving the precision of the reflector surface and enlarging the aperture of the reflector, it is especially necessary to adopt a reasonable expandable structure. [0003] At present, the structural forms of deployable reflector ...

AI Technical Summary

Problems solved by technology

[0005] (1) Poor storage ratio

The smaller the number of blocks on the reflective surface, the simpler the expandable structure and the better the reliability, but the corresponding storage effect is poor, so the caliber of the reflective surface cannot be further increased, and the application and promotion are also limited.

[0006] (2) Poor overall stability

At present, the most common structural form of deployable solid-surface reflector antenna is to divide it into several sectors along the circumference. However, the sectors are relatively independent and have no connection. The formed cantilever structure is particularly unfavorable under vibration, and each sector cannot be formed. With an overall structure, the surface accuracy of the reflective surface is greatly reduced, and the application and promotion are also limited

[0007] (3) The dynamic performance is not ideal

Since the expandable solid-surface reflector antenna maintains the surface accuracy of the reflector through the structural stiffness of the solid surface, its own rigidity is high and the fundamental frequency is easy to coincide with the fundamental frequency of the star or the fundamental frequency of the launch vehicle to cause resonance, and the fundamental frequency of the structure is also low. Easy to adjust, so app promotion is limited

Images