Modular triangular prism truss type deployable planar antenna mechanism

Abstract

The invention discloses amodular triangular prism truss type deployable planar antenna mechanism which comprises bottom cross rods, bottom longitudinal rods, a lifting triangular folding and unfolding arm, foldable cross beams, foldable inclined pull beams and triangular end frames. The lifting triangular folding and unfolding arm is arranged between the two triangular end frames which are arranged side by side, the planes where the lifting triangular folding and unfolding arm and the triangular end frames are located are arranged in parallel, and the bottom cross rods, the foldable cross beams and the foldable inclined pull beams are arranged between the lifting triangular folding and unfolding arm and the two triangular end frames; ends of every two adjacent bottom cross rods are hinged to inter-plate hinge joints, the other ends of every two adjacent bottom cross rods are hinged to the triangular end frames, the bottom longitudinal rods and the lifting triangular folding and unfolding arm are hinged to the inter-plate hinge joints, ends of the foldable inclined pull beams are connected with the inter-plate hinge joints, and the other ends of the foldable inclined pull beamsare hinged to the triangular end frames. Ends of the foldable cross beams are hinged to the lifting triangular folding and unfolding arm, and the other ends are hinged to the triangular end frames. The mechanism is stable and reliable in unfolding motion and high in structural rigidity.

Description

technical field [0001] The invention relates to an antenna mechanism, in particular to a modular triangular prism truss type expandable planar antenna mechanism. Background technique [0002] Since the birth of the first spaceborne SAR, it has attracted widespread attention because it can obtain high-resolution images of almost every corner of the earth, all-weather, all-time, regardless of national borders. Especially after nearly ten years of rapid development, many countries have mastered SAR satellite technology, and a large number of deployable mechanisms in various forms have been widely used as support mechanisms for spaceborne SAR array antennas. [0003] Large-scale and light-weight are the development trends of deployable antenna mechanisms for on-orbit applications. Developed countries such as Canada and the United States carried out research on deployable antenna mechanisms earlier, and the related technologies are relatively mature. At present, the space-borne...

AI Technical Summary

Problems solved by technology

[0004] 1) The deployment movement of the deployable antenna mechanism is relatively complicated, which reduces the reliability of its on-orbit deployment application. For example, the deployment process of the SAR antenna of the Seasat satellite developed by the United States requires three movements

[0005] 2) The stiffness of the deployment position and attitude is not high, resulting in a low resolution of the planar antenna. For example, the resolution of the SAR antenna of the Seasat satellite developed by the United States is only 25m

[0006] 3) Most of the planar antennas currently used are not modular, and do not have universality and scalability

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