A Structure Optimization Method for Spaceborne Mesh Deployable Antenna Considering On-orbit Thermal Environment

Abstract

The invention discloses a satellite-borne netted deployable antenna structure optimizing method in consideration of an on-orbit thermal environment. The method comprises the following steps: firstly, giving an initial point, a convergence precision and a cable net strain lower limit; secondarily, determining the gradient vector of cable strain with respect to the design variable, the gradient vector of the stress with respect to the design variable, the gradient vector of the precision with respect to the design variable and the gradient vector of the target function with respect to the design variable at the R-th iteration; and then solving an optimization model to obtain the R-th design variable correction value; performing the design variable correction after the R-the iteration again; repeating the process till to obtain the optimal solution. Through the adoption of the method disclosed by the invention, the necessary requirement while designing the antenna can be satisfied, and the design effect can be optimized; under the condition of improving the precision of a reflecting surface and lightening the structure weight, the method can effectively guarantee that the tension force at the cable section cannot occur relaxation; the computing efficiency of designing the antenna structure can be obviously improved while guaranteeing the computing precision, and the computing quantity of designing the structure can be obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of cable-net reflector antenna structures, and in particular relates to a method for optimizing the structure of an on-orbit mesh expandable antenna considering the on-orbit thermal environment. Background technique [0002] Deployable mesh antennas have attracted extensive attention due to their characteristics of large aperture, high precision, and low surface density. In order to make the antenna meet the high-frequency and high-performance requirements, it is first necessary to make the antenna have a high surface accuracy through form-finding. Commonly used mesh antenna form-finding methods include inverse iteration method, boundary cable net and internal cable net two-step design method, shape design of cable-net reflector antenna considering the deformation of the supporting truss, etc. Considering the capacity limitation of the launch vehicle, the lighter the quality of the antenna, the better. Howe...

AI Technical Summary

Problems solved by technology

Considering the capacity limitation of the launch vehicle, the lighter the quality of the antenna, the better. However, the light weight of the antenna will inevitably reduce its structural rigidity and strength. In order to make the antenna have both light weight and high performance, the antenna needs to Structural optimization

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