Electromechanical coupling-based direction adjustment method of large-scale forming double-reflection surface antenna

Abstract

The invention discloses an electromechanical coupling-based direction adjustment method of a large-scale forming double-reflection surface antenna. The method includes the following steps that: (1) the finite element model of an antenna structure is established; (2) the piecewise fitting surface of the forming main reflection surface of the antenna is determined; (3) finite element node coordinates after the thermal deformation of the main reflection surface, as well as the rotation angle and vertex displacement quantity of an auxiliary reflection surface are calculated; (4) the optimal matching surface of the forming main reflection surface of the antenna after deformation is determined; (5) antenna direction deviation caused by temperature distribution of the main reflection surface of the antenna is calculated; (6) direction deviation of the auxiliary reflection surface caused by the thermal deformation of the antenna is calculated; (7) total direction deviation caused by the structural thermal deformation of the antenna is calculated; (8) the total direction deviation of the antenna under a local coordinate system is converted into direction adjustment quantity of the antenna under a geodetic coordinate system; and (9) the direction of the antenna and the direction of beams after adjustment are calculated. According to the method of the invention, the electric performance of the antenna is improved through adjusting the azimuth pitch angle of an antenna servo system. The analysis and calculation processes of the method are more concise and efficient.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a pointing adjustment method of a large-scale shaped double-reflector antenna based on electromechanical coupling, which is used for adjusting the beam pointing of the shaped double-reflector antenna to optimize the electrical performance of the antenna. Background technique [0002] Large antennas play an important role in fields such as deep space exploration, astronomical observation, and strategic long-range early warning. Under the action of gravity load, temperature load and wind load, etc., the antenna will undergo structural deformation, which will make the reflective surface deviate from the shape required by the electrical design, and at the same time make the beam pointing of the antenna deviate from the original design direction of the antenna, thus seriously affecting the electrical performance of the antenna. influences. This effect is more obvious with the increa...

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Problems solved by technology

[0005] Aiming at the deficiencies of the previous compensation methods, the present invention provides a pointing adjustment method based on electromechanical coupling for a large-scale shaped double-reflector antenna, which mainly solves the beam pointing deviation caused by thermal deformation of the large-scale shaped double-reflector antenna The problem is to improve the electrical performance of the antenna by adjusting the azimuth and elevation angles of the antenna servo system

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