Optimum setting angle based large-scale antenna reflecting plane gravity pre-regulation method

A reflective surface and angle adjustment technology, applied in the direction of antennas, electrical components, etc., can solve problems such as deviation from shape and poor electrical performance of the antenna, and achieve the effect of improving the accuracy of the reflective surface and the overall working performance

Inactive Publication Date: 2009-12-23
XIDIAN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

Since the actual working elevation angle of the antenna cannot be all in the sky-up attitude, when it works in a non-sky-up attitude, the adjusted reflective surface will deviate from the original shape due to gravity deformation, resulting in poor electrical performance of the antenna

Method used

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  • Optimum setting angle based large-scale antenna reflecting plane gravity pre-regulation method
  • Optimum setting angle based large-scale antenna reflecting plane gravity pre-regulation method
  • Optimum setting angle based large-scale antenna reflecting plane gravity pre-regulation method

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Embodiment Construction

[0037] The present invention will be described in further detail below with reference to the accompanying drawings.

[0038] For an antenna working at a fixed elevation angle, the working elevation angle can be selected as the best adjustment angle of the antenna reflection surface; for an omnidirectional movable antenna, the working elevation angle can be divided into several sections according to the movement law of the tracking target, and the target is obtained in each section. The probability of segment appearance is used as a weighting factor, aiming at the minimum weighted half-optical path difference square sum caused by self-weight deformation of each segment, and establishing a mathematical model to optimize and solve the best adjustment angle. Theoretically, the antenna should be placed at the best adjustment angle to adjust the installation and adjustment of the reflector panel. However, due to the large structure of the large reflector antenna, when it is tilted at...

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Abstract

The invention discloses a gravity pre-adjustment method of a large-scale antenna reflection surface based on an optimal adjustment angle. The method is based on the mechanical analysis of the antenna structure, and establishes the function of the gravity deformation and elevation angle of the antenna reflection surface node according to Hooke's law and the principle of vector superposition Relational formula; calculate the mean square error of the reflection surface deformation at any elevation angle relative to the best matching paraboloid; according to the user's requirements for the antenna working conditions, establish an optimized mathematical model and solve the adjustment angle for the best antenna performance; calculate the best adjustment angle The gravitational deformation at the place and take it as the preset value when the antenna is adjusted to the sky; use the optical theodolite to observe the axial height of the adjustment point on the antenna reflection surface to determine the attitude of each panel in the entire reflection surface, and adjust the adjustment point to the preset value. at the tuned position. The invention has the advantages of obviously improving the precision of the antenna reflection surface and the overall working performance, and can be used for installation and adjustment of the large antenna reflection surface.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a gravity pre-adjustment method for a large-scale antenna reflection surface based on an optimal adjustment angle, which is used to guide the installation and adjustment of the antenna reflection surface. Background technique [0002] The surface accuracy of the antenna reflector is an important technical performance index to measure and evaluate the quality of the antenna. It not only directly affects the aperture efficiency of the antenna, thereby determining the shortest wavelength that the antenna can work; it also affects the main lobe width and side lobe structure of the antenna pattern. . By measuring the reflective surface of the antenna, its surface accuracy can be determined, and its influence on the electrical performance of the antenna can be deduced from the surface accuracy. The surface accuracy requirements of the reflective surface are related to the operating f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14
Inventor 段宝岩王伟周生怀
Owner XIDIAN UNIV
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