High-rigidity synchronously spreading folded space extension arm

Abstract

The high-rigidity synchronously spreading folded space extension arm consists of folded truss units capable of being expanded repeatedly and being spread, driving system, power supply system and supporting space platform. The folded truss units are basic units to constitute the extension arm and are connected mutually via standard triangular joints; the driving system is inside the triangular space in the bottom of the extension arm and is connected to the supporting space platform and to the power supply system through the transmission shaft. The truss structure in triangular prism form of the present invention has geometrical stability, high structural rigidity and high unit repeatability, and may be spread and folded synchronously in high precision. The present invention may be used in large communication satellite, electronic reconnaissance satellite and space station platform.

Description

Technical field: [0001] The invention relates to a high-rigidity synchronous unfolding and folding space extension arm, which can be directly applied to the supporting back frame of large-scale space deployable antennas (communication and reconnaissance satellites), the extendable feed source support, the support system of deployable solar sails, and aerospace vehicles. The accessory connecting mechanism etc. belong to the field of aerospace science and technology. Background technique: [0002] The systematic research and application of spatial unfolding structures began in the late 1970s, but developed rapidly. Many novel and creative unfolding structure concepts have been proposed, and some have been applied. NASA of the United States, ISAS of Japan, and ESA of Europe have successively developed expandable and foldable space extension arms for their aerospace projects. The research and application of expandable structures in my country is still in its infancy, and the ap...

AI Technical Summary

Problems solved by technology

The weight of the extension arm is small, but the number of active cables is large, the cable path is complicated and the distance is long, which will reduce the reliability of unfolding and folding, and the storage rate will be low

[0006] The literature (Chen Wujun, Guan Fuling, Design and structural analysis of a deployable / retractable space mast, Journal of IASS, 1998, 39(2): 111-116.) proposes to construct an expandable and foldable space extension arm based on octahedral units, and also adopts The active cable drives the deployment, and the passive cable maintains the stability of the system and improves the structural rigidity of the extension arm. The deployment unit is independent and has high rigidity, but the joints and components are complicated. The reliability and storage rate of the extension arm are still not very suitable for large aerospace vehicles.

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