Abstract
A method of cable-net shape design based on the equilibrium matrix method is proposed for a new parabolic cylindrical deployable antenna structure with fewer modules. And the inverse iteration method is adopted to find the shape of cable-truss structure with considering the truss deformation induced by cable tension. Firstly, the ideal geometrical configuration of the locally symmetric support cable is designed for the given truss. Then, the pretension distribution of the cable is solved by the equilibrium matrix method under the circumstance of the unchanged topology of cable-net structure, position of nodes and boundary condition. In addition, the inverse iteration method is adopted to find the shape of cable-truss structure. Finally, the validity of the method is verified by simulation analysis.
Highlights
The space-borne parabolic cylindrical deployable antenna has become one of the new development directions of space-borne antennas with its merits of strong directivity, high gain, and easy automatic beam scanning [1]
The parabolic cylindrical deployable antenna is mainly composed of a deployable truss, a supporting cable-net structure, a reflecting surface and an adjustable device
The shape design of the mesh deployable antenna is one of the fundamental parts, which is of great significance for ensuring the shape accuracy and structural stability of reflector
Summary
The space-borne parabolic cylindrical deployable antenna has become one of the new development directions of space-borne antennas with its merits of strong directivity, high gain, and easy automatic beam scanning [1]. The parabolic cylindrical deployable antenna is mainly composed of a deployable truss, a supporting cable-net structure, a reflecting surface and an adjustable device. The shape design of the mesh deployable antenna is one of the fundamental parts, which is of great significance for ensuring the shape accuracy and structural stability of reflector. The metal reflective mesh is attached to the convex side of front net, and its shape accuracy is limited by the geometry of cable-net structure. For the shape design of the parabolic cylindrical deployable antenna, we design the initial pretension of supporting cable-net structure at the first step. The shape accuracy of antenna with taking the truss deformation into consideration would meet the design requirement by updating the coordinates of front cable-net iteratively and the morphological analysis of cable-truss structure would be realized
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