Topological structure design method for foldable paraboloid antenna cable net surface based on electrical performance optimization

Abstract

The invention discloses a topological structure design method for a foldable paraboloid antenna cable net surface based on electrical performance optimization, and the foldable paraboloid antenna cable net surface consists of a front cable net surface and a rear cable net surface. The design of the front cable net surface comprises the steps: taking internal nodes of the front cable net surface as design variables, taking boundary node fixing as the boundary condition, obtaining all node coordinates of the front cable net surface under the conditions that all internal nodes are not limited by an ideal paraboloid and the internal nodes are in the state of force balance, carrying out the axial translation optimization of all node coordinates based on the antenna gain electrical performances, and achieving the minimization of an illumination weighted profile error of a front cable net surface. The design of the rear cable net surface comprises the steps: employing the same design method as the front cable net surface under the condition that the total height of a foldable paraboloid antenna is met, and obtaining the structure of the rear cable net surface. The method achieves the excellent structural layout of the foldable paraboloid antenna cable net surface, can remarkably improve the profile precision, stability and electrical performance of the foldable paraboloid antenna.

Description

technical field [0001] The invention relates to a structure design method of a space-deployable parabolic antenna, in particular a method for optimizing the shape of the front and rear cable mesh surfaces of the deployable parabolic antenna, specifically a method for designing the topological structure of the cable mesh surface of the deployable parabolic antenna based on electrical performance optimization, which is applied to Structural Design of Spatial Large Aperture Parabolic Antenna. Background technique [0002] In recent years, space activities have become more and more frequent, and large-aperture deployable parabolic antennas have become more popular. The parabolic antenna of the ring truss is mainly divided into five parts: the front cable mesh surface, the rear cable mesh surface, the longitudinal cable, the metal reflection mesh, and the ring peripheral truss. Driven by the power unit, the parabolic antenna expands and contracts smoothly, thereby achieving a hi...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that all internal nodes are limited to ideal paraboloids, and node coordinates are not optimized. Obviously, the accuracy of the antenna design is poor, and it cannot meet the structural performance requirements of the antenna gain on the parabolic antenna.

Images