Electric coupling analysis method of temperature loader of large-scale foundation surface antenna

An analysis method, electromechanical coupling technology, applied in antenna radiation pattern, electrical digital data processing, special data processing applications, etc., can solve the problems of high cost of active measures, not directly considering the impact of solar radiation, etc.

Inactive Publication Date: 2011-11-16
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The cost of active measures is relatively high. Due to the air conditioning system, the thermal analysis of such antennas generally starts from the ambient temperature and does not directly consider the influence of solar radiation.

Method used

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  • Electric coupling analysis method of temperature loader of large-scale foundation surface antenna
  • Electric coupling analysis method of temperature loader of large-scale foundation surface antenna
  • Electric coupling analysis method of temperature loader of large-scale foundation surface antenna

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Embodiment Construction

[0092] like figure 1 Shown: First, according to the time, geographical location and attitude of the antenna, according to the three heat transfer conditions of conduction, convection and radiation, calculate the heat flux density of the antenna from the sun; then use the heat flux density as the load to conduct thermal analysis on the antenna , to obtain its temperature distribution; secondly, the temperature distribution is added to the finite element model of the antenna as a temperature load, and the deformation of the antenna is obtained by structural analysis; finally, the deformation of the main surface of the antenna is extracted, and the far-field pattern of the antenna is calculated, and the gain loss and pointing error are given, Sidelobe level.

[0093] The calculation of the heat flux density from the sun on the antenna is different from the radiation environment in space. When sunlight passes through the atmosphere, it will be scattered and absorbed by molecules ...

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Abstract

The invention relates to an analysis method of a large-scale foundation surface antenna, in particular to an electric coupling analysis method of a temperature loader of a large-scale foundation surface antenna. The method is characterized by comprising the following steps of: 1) determining time, geographical position and gesture of the antenna; 2) calculating the density of heat flow from the sun to the antenna; 3) performing thermal analysis on the antenna by using the density of the heat flow as a load to obtain temperature distribution; 4) adding the temperature distribution serving as atemperature load into a finite element model of the antenna, and performing structural analysis to obtain antenna deformation data; 5) extracting the main surface deformation data of the antenna, andcalculating a far-field pattern of the antenna; and 6) giving a gain loss, a directional error and a minor lobe level. The invention provides the electric coupling analysis method of the temperature loader of the large-scale foundation surface antenna. By the method, influence on the electric performance can be analyzed when the antenna which faces upwards deforms due to the influence of environment, solar radiation and temperature.

Description

technical field [0001] The invention relates to an analysis method for a large ground plane antenna, in particular to a temperature load electromechanical coupling analysis method for a large ground plane antenna. Background technique [0002] There are many large-aperture antennas in the world, most of which are used for astronomical observation. The working frequency band of the radio astronomy telescope may reach 100-300GHz, and the surface accuracy is required to reach the micron level, so reasonable thermal control measures must be adopted. Proactive measures include adding radome protection, or adding an air conditioning system to the back frame to reduce the temperature gradient of the antenna. Passive measures such as spraying the surface with high reflectivity paint to reduce heat absorption. At the same time, the temperature and deformation of the antenna are monitored in real time, and the adjustable side surface is used to ensure the electrical performance indi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10G06F17/50
Inventor 段宝岩李鹏袁婕王伟郑飞黄进
Owner XIDIAN UNIV
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