Electromechanical integration optimization design method for space mesh antenna under action of temperature load

Abstract

The invention discloses an electromechanical integration optimization design method for a space mesh antenna under the action of a temperature load. The design method comprises the specific steps of (1) inputting geometric parameters, material parameters and electric parameters of the antenna; (2) building a structural finite element model of the antenna; (3) building a thermal finite element model of the antenna; (4) setting a boundary condition; (5) selecting an orbit; (6) calculating a temperature field; (7) loading a temperature field load; (8) calculating thermal deformation; (9) outputting a thermal deformation displacement; (10) calculating an ideal far electric field of the antenna; (11) approximately calculating a change quantity of the far electric field of the antenna; (12) calculating the far electric field of the antenna; (13) judging whether electric performance meets a requirement or not; (14) outputting an antenna structure design scheme; and (15) updating the antenna parameters. According to the design method, the electric performance of the space mesh antenna under the action of the temperature load is analyzed by adopting the approximate calculation method, and the electromechanical integration optimization design of the antenna structure is realized.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and in particular relates to an electromechanical integration optimization design method of a space mesh antenna under temperature load in the field of radar antennas. Background technique [0002] Mesh antennas are gradually used in space antenna design due to their advantages of light weight and small folded volume. During the operation of the mesh antenna in orbit, it is periodically affected by space radiation heat, and the deformation of the antenna surface caused by thermal deformation has a great impact on the electrical performance of the antenna. The antenna surface error caused by thermal deformation will cause the antenna gain to decrease, the side lobe level to increase, and the beam to tilt, which will seriously affect the performance of the antenna. Therefore, it is necessary to analyze the temperature load of the space mesh antenna in orbit, and propose an approximate calcu...

AI Technical Summary

Problems solved by technology

This method takes the spaceborne antenna as the object, and predicts the thermal deformation of the spaceborne antenna under extreme working conditions; this method does not take into account the influence of the thermal deformation of the antenna on the electrical performance, and it is difficult to predict the change of the electrical performance of the antenna under the temperature load

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