Face-to-Antenna Pointing Large-scale Deformed Parabolic Antenna Panel Movement Fitting Adjustment Method

Abstract

The invention discloses an antenna pointing oriented large deformed parabolic antenna panel movement fitting adjustment method.The antenna pointing oriented large deformed parabolic antenna panel movement fitting adjustment method comprises the steps of determining a parabolic antenna structure scheme and the initial position of an actuator, establishing an antenna structure finite element model and an actuator supporting panel node, calculating antenna structure self-weight deformation, extracting the node information of a deformed paraboloid, calculating the electrical properties of an antenna, determining the node, corresponding to an ideal designed surface, of the paraboloid, virtualizing a moving panel, calculating a targeted curved surface having the minimum reflecting surface fitting root-mean-square error, determining the node, corresponding to the targeted curved surface, of the paraboloid, calculating the actuator adjustment amount, adjusting the position of the panel, updating the antenna structure finite element model, calculating the antenna pointing of the deformed paraboloid and judging whether the antenna pointing meets the requirements or not to obtain the optimal panel movement fitting adjustment amount.The antenna pointing oriented large deformed parabolic antenna panel movement fitting adjustment method can directly calculate antenna pointing oriented actuator adjustment amount, ensures the work pointing and original focal distance of the antenna, improves the reflecting surface precision of the antenna and is good in overall performance.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for adjusting the movement and fitting of a panel of a large-scale deformed parabolic antenna facing the antenna pointing, which is used for actively adjusting the position of the reflector panel of the large-scale deformed parabolic antenna to optimize the overall performance of the antenna. Background technique [0002] A large-area area antenna mainly used for receiving functions must be built both large and well. "Big" means that it has a large aperture and a large gathering area, which can receive stronger signals and observe weak sources in space; "good" means With a more accurate reflective surface and higher pointing accuracy, the radio telescope can "see far, see clearly, and see accurately". Faced with the development trend of large-aperture radio telescopes and high-frequency bands, large-scale antennas serving in complex environments will undergo structural ...

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Problems solved by technology

Among the existing patents related to the electrical performance compensation of large antennas, for example, the patent application number of the Key Laboratory of Electronic Equipment Structure Design of the Ministry of Education of Xidian University is 201310393511.X, and the invention name is "A Deformable Large Single Reflector Feed Position Compensation Method for Antenna", the patent application number is 201510114942.7, the invention name is "A Secondary Surface Compensation Method for Large Shaped Double Reflector Antenna Based on Electromechanical Coupling", and the patent application number is 201510548132.2, the invention name is " A Pointing Adjustment Method for Large Shaped Double-Reflector Antenna Based on Electromechanical Coupling", they are all based on the traditional antenna structure, by moving the feed source, the sub-surface to the best matching position, and the overall azimuth and pitch rotation of the antenna The adjustment method can ensure the working direction of the antenna. However, the antenna profile still has deformation, which cannot make up for the problems of antenna gain loss and low surface efficiency. Moreover, these adjustment methods are cumbersome and cannot meet the working performance of large antennas in practical applications. compensate

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