A cable-membrane composite structure deployable satellite antenna

Abstract

The invention discloses a deployable satellite antenna of a cable and film combined structure. The antenna is composed of an external annular truss and the internal cable and film combined structure,the annular truss includes a foldable structure composed of a movable joint and a rod member, pneumatic rods are arranged in an annular array in the structure, and the pneumatic rods are driven in parallel via an air feed system and unfolded. The flexible cable and film combined structure composed of a reflective film, a film net, a vertical stay cable and a back net side is connected into a cylindrical space in the annular truss, the internal flexible structure is unfolded after the truss is unfolded, the film net diffuses a concentrated active force of the vertical stay cable in the lower edge into a uniform force field in a film by means of elastic deformation of the film net itself, a needed parabola is formed in the upper edge of the film net, and the reflective film is attached to the upper edge of the film net to form a continuous curved surface and further fit a rotary paraboloid. The curve net side in the upper edge of the film net is used to fit the rotary paraboloid, and thedesign precision is improved greatly compared with present linear fitting technology.

Description

technical field [0001] The present invention relates to satellite dishes, and more particularly, the present invention relates to deployable satellite dishes. Background technique [0002] With the development of aerospace technology, many scientific application fields have put forward the demand for large-aperture antennas, the purpose of which is to obtain signals with small transmission power. Communication satellites, relay satellites, military reconnaissance satellites, and space offensive and defensive microwave weapons all require antennas with a diameter of more than ten meters. The long baseline interferometer required by radio astronomy also has a diameter of more than ten meters. The earth also needs a giant antenna with a diameter of more than 100 meters; on the other hand, the carrying weight and capacity of the rocket launch cabin are very limited; this requires that the satellite antenna must have the characteristics of light weight, large diameter, expandabil...

AI Technical Summary

Problems solved by technology

The greater the prestress, the better the rigidity of the cable-net antenna structure, but the greater the requirement for the driving force of the antenna structure. Due to the limited power of the satellite antenna drive motor, this will make it difficult or impossible to unfold the antenna structure.

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