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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: 2008-05-14
XIDIAN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

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

[0038] The present invention will be described in further detail below with reference to the accompanying drawings.

[0039] For the antenna working at a fixed elevation angle, the working elevation angle can be selected as the best adjustment angle of the antenna reflector; 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 position in each The probability of segment occurrence is used as a weighting factor, and a mathematical model is established to optimize the optimal adjustment angle with the goal of minimizing the sum of the squares of the weighted half-optical path difference caused by the self-weight deformation of each segment. Theoretically, the antenna should be placed at the best adjustment angle for installation and adjustment of the reflector panel. However, due to the large structure of the large reflector antenna, when it is tilted at a cert...

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Abstract

The invention discloses a method for presetting the gravity of a reflector of a large antenna; according to law the Hooke and the superposition principle of vectors and on the basis of the structural mechanics analysis for the antenna, the method establishes the functional relation about the gravity deformation on antenna reflector nodes and the elevation so as to calculate the MSE (mean square error) of the reflector deformation of an arbitrary elevation relative to the optimally-matched paraboloid; aiming at the requirement for the antenna condition by users, the optimized mathematical model is established and an adjustment angle optimizing the antenna performance is solved; the gravity deformation figured out at the optimal adjustment angle is used as a preset valve for adjusting the elevation of the antenna; the axial height of an adjustment point on the antenna reflector is observed by an optical the theodolite so as to determine the posture of each panel on the whole reflector with the adjustment point configured to the position of the preset value. The invention has the advantages of evidently increasing the antenna reflector precision and the whole working performance, and can be used for the installation and adjustment for large antenna reflector.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for pre-adjusting the gravity of a large antenna reflection surface based on an optimal adjustment angle, which is used for guiding 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 oral efficiency of the antenna, thereby determining the shortest wavelength at which the antenna can work; it also affects the main lobe width and side lobe structure of the antenna pattern. . By measuring the antenna reflector, its surface accuracy can be determined, and its influence on the electrical performance of the antenna can be calculated from the surface accuracy. The surface accuracy requirements of the reflective surface are related to the working frequency. Th...

Claims

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Application Information

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IPC IPC(8): H01Q15/14
Inventor 段宝岩王伟周生怀
Owner XIDIAN UNIV
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