Scissor linkage double-layer ring truss expandable antenna mechanism

Abstract

The invention relates to a scissors fork linkage type double-layer circular truss unfoldable antenna mechanism. The scissors fork linkage type double-layer circular truss unfoldable antenna mechanism includes an inner-layer circular truss assembly, an outer-layer circular truss assembly and N inner and outer layer connection truss assemblies; each of the inner-layer circular truss assembly and the outer-layer circular truss assembly includes N folding and unfolding units, wherein adjacent folding and unfolding units are connected through two disk chucks; after being unfolded, each of the inner-layer circular truss assembly and the outer-layer circular truss assembly is a multi-faced circular truss structure; the inner-layer circular truss assembly and the outer-layer circular truss assembly are arranged concentrically; four disk chucks between the inner-layer circular truss assembly and the outer-layer circular truss assembly, which are located in a vertical plane, are connected together through one inner and outer layer connection truss assembly; the structure form and connection mode of the inner-layer folding and unfolding units are similar to the structure form and connection mode of the outer-layer folding and unfolding units; outer-layer rods are longer than inner-layer rods; and the length difference value of the outer-layer rods and the inner-layer rods can be designed according to the specific aperture and folding ratio of the unfoldable antenna. The scissors fork linkage type double-layer circular truss unfoldable antenna mechanism of the invention has the advantages of high rigidity, structural simplicity and high reliability. According to the scissors fork linkage type double-layer circular truss unfoldable antenna mechanism, the expansibility of modules is high, and the number of the modules can be changed randomly according to the requirements of the aperture of the antenna and the sizes of units. The scissors fork linkage type double-layer circular truss unfoldable antenna mechanism can be applied to communication satellites, space stations and space detectors.

Description

technical field [0001] The invention relates to a deployable antenna mechanism. Background technique [0002] With the rapid development of manned spaceflight, earth observation, deep space exploration, and space communication, the size of space mechanisms required in various aerospace projects is getting larger and larger to meet the needs of different space missions. Due to the limitation of the effective space of the tool, it is necessary to design a space folding mechanism with a large folding ratio. It is in a folded state during the launch and transportation stages and is folded in the fairing. After the spacecraft enters orbit, it will be unfolded to the working state. With the gradual development of various aerospace research programs and the continuous complexity of aerospace systems, the design of the space deployment mechanism has become a key fundamental issue in the development of the future aerospace industry. In recent years, the space deployment mechanism has...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low rigidity of the existing ring truss mechanism, serious decrease in stiffness with the increase of the antenna aperture, small folding ratio of the mechanism, and low reliability, and further provide a scissors linkage double-layer ring truss Truss Deployable Antenna Mechanism

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