Folding and unfolding mechanism facing spacecraft multi-plate unfoldable antenna

Abstract

The invention discloses a folding and unfolding mechanism facing a spacecraft multi-plate unfoldable antenna. The folding and unfolding mechanism comprises an antenna inner plate unfolding part, an antenna outer plate unfolding part and a truss rod system. According to the folding and unfolding mechanism facing the spacecraft multi-plate unfoldable antenna provided by the invention, the layout and composition of an existing mechanism are optimized, an inner plate active device is arranged on an antenna inner plate and is directly connected with an internal connecting hinge on one side, an outer plate active device arranged on the antenna inner plate is positioned in the middle of two outer plate connecting hinges and is connected with an outer plate through a set of connecting rod mechanism; the antenna inner plate and the outer plate are driven by the two sets of mutually independently controlled active devices to realize unfolding; the truss rod system adopts a single-point diagonal bracing type structure to be connected with a spacecraft platform, and the truss rod system composed of a multi-joint hinge and a spacecraft platform mounting support is positioned in a plane formed by the multi-joint hinge and an antenna outer plate mounting support, so that the support stiffness of the truss rod system is effectively improved, and the folding and unfolding mechanism can be used for unfolding and supporting of two spacecraft single-wing flat plate type antennas.

Description

technical field [0001] The invention relates to the technical field of aerospace vehicles, in particular to a folding mechanism for multi-board deployable antennas of spacecraft. Background technique [0002] At present, there are many researches and applications on the expandable mechanism of the satellite solar wing at home and abroad, and there is no special precision requirement after the solar wing is deployed in orbit; and the SAR flat panel antenna has a direct impact on the electrical performance of the antenna due to the shape and surface accuracy of the antenna after deployment. It has a great relationship with its imaging quality. In order to ensure that the SAR antenna maintains a relatively high rigidity after being deployed in orbit, a rod system support scheme is usually used on the back of the antenna. The Canadian RADARSAT satellite is a typical application in foreign countries. The development of radar satellites in China started relatively late, and the ...

AI Technical Summary

Problems solved by technology

[0003] a. The institutional layout and composition design are relatively complex;

[0004] b. The inner and outer plates of the antenna are driven by a set of active devices, the antenna deployment mode is single, and the movement coordination of the two flat plate antennas is highly required;

[0005] c. The rod system of the mechanism is connected with the spacecraft platform by a single-point cross-bar support, and the overall support rigidity needs to be improved

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