Composite scissor-like hoop truss deployable antenna mechanism

Abstract

The invention discloses a composite scissor-like hoop truss deployable antenna mechanism, which comprises N deployable mechanism units of the same structure. The adjacent deployable mechanism units are connected through sharing two upper and lower node connection members and an intermediate node connection member, and a multi-faceted hoop truss mechanism is together formed. Each deployable mechanism unit comprises two scissor rods, four connecting rods, four reinforcing rods, four upper and lower node connection members and two intermediate node connection member, and all rotating auxiliary axes connected onto the scissor rods, the connecting rods and the reinforcing rods in the same deployable mechanism unit are parallel. Motion pairs in the whole mechanism are all rotating pairs, the assembly manufacturing process is good, the structure symmetry is high, hoop truss spatial deployable mechanisms with different scales can be formed through changing the number of the deployable mechanism units and the lengths of the rods, and the antenna mechanism disclosed in the invention can be used as a support mechanism to be well applied to a spaceborne hoop truss deployable antenna.

Description

technical field [0001] The invention relates to a deployable antenna mechanism, in particular to a composite scissor-hinge peripheral truss deployable antenna mechanism. Background technique [0002] Space deployable mechanism refers to a type of mechanism that can be deployed from a folded state to a predetermined or desired structure and can withstand a specific load. It is widely used in communication satellite platforms, space stations, aerospace vehicles and other spacecraft. one of the research hotspots. With the development of space technology and the needs of national defense construction, the demand for large-scale space antennas in various countries is becoming more and more urgent. However, due to the space constraints of space vehicles, aerospace space agencies must be folded and folded in the fairing during the launch phase, waiting for spaceflight. After entering the orbit, the device unfolds to the working state by itself, so its folding ratio and quality are...

AI Technical Summary

Problems solved by technology

[0004] Although a series of achievements have been made in the research on the existing peripheral truss-type deployable antennas, there are still problems such as the lack of types of such antennas on-orbit operating mechanisms, and the serious decrease in antenna stiffness after the aperture increases. Some ring-truss deployable antennas The tension zipper is used to improve the overall stiffness of the antenna mechanism, but the tension zipper is more complicated, difficult to control, and also reduces the reliability of the overall structure. These problems will lead to the failure of the antenna deployment and cause huge economic losses.

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