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A prediction method for extreme conditions of on-orbit temperature of spaceborne antenna

A technology of a spaceborne antenna and a prediction method, applied in the aerospace field, can solve the problems of the temperature change of the spacecraft surface, the failure of the satellite to work normally, and the failure.

Inactive Publication Date: 2016-11-30
SPACE STAR TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In particular, its periodic exposure to light areas and shadow areas will lead to drastic changes in the surface temperature of the spacecraft, which may cause fracture, deformation or even failure of materials and components, and even make the satellite unable to work normally.

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  • A prediction method for extreme conditions of on-orbit temperature of spaceborne antenna
  • A prediction method for extreme conditions of on-orbit temperature of spaceborne antenna
  • A prediction method for extreme conditions of on-orbit temperature of spaceborne antenna

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Embodiment Construction

[0064] The present invention will be further described below in conjunction with the accompanying drawings.

[0065] refer to figure 1 As shown, the extreme working condition prediction method of the on-orbit temperature of the spaceborne antenna, the steps are as follows:

[0066] (1) Through the given orbital parameters of the spaceborne antenna, calculate the change law of the incident angle β angle of the sun's rays relative to the orbital surface of the spaceborne antenna within a year, as shown in Figure 2-5 shown. The parameters involved include the date of interval with the vernal equinox t, the angle of intersection ε, orbital height H, orbital inclination i, eccentricity e, and the local time of descending node t 0 , the orbital period T, the difference in right ascension of the ascending node of the orbit and the flat sun γ′, the difference in right ascension between the ascending node and the true sun α, the difference in right ascension of the true sun and the ...

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Abstract

The invention discloses a method for predicting the extreme working conditions of the on-orbit temperature of a space-borne antenna. The method includes: (1) calculating the change law of the sun's incidence angle β relative to the orbital surface within a year through given orbital parameters; (2) ) According to the parameters in (1), calculate the sun exposure factor through the change rule of β angle within one year, so as to judge whether there is a shadow moment in a cycle; (3) According to whether there is shadow in step (2), predict the satellite antenna Extreme low temperature conditions; (4) Predict the extreme high temperature conditions of the spaceborne antenna according to whether there is shadow in step (2); Compared with the daily temperature, take the temperature working condition T Max The temperature of the working condition is regarded as the extreme high temperature working condition, and the temperature working condition T is taken as Min For extreme low temperature conditions. This method is aimed at the space-borne antenna, by calculating the change rule of the sun’s incidence angle β relative to the orbit surface to judge the solar exposure factor of the orbit within a year, so as to judge the date of the occurrence of the extreme working condition of the orbit, and use the envelope method to load the extreme heat flow to calculate the space-borne The extreme temperature of the antenna can achieve the purpose of predicting the extreme working conditions of the spaceborne antenna.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a method for predicting the extreme working condition of the on-orbit temperature of a space-borne antenna. Background technique [0002] The long-term and reliable operation of spacecraft and its on-board electronic equipment in orbital space needs to adapt to various extreme environmental conditions in space, such as vacuum, microgravity, low temperature, black background, solar radiation and thermal radiation of planets such as the earth. In particular, its periodic experience of illuminated areas and shadowed areas will lead to drastic changes in the surface temperature of the spacecraft, which may cause fracture, deformation or even failure of materials and components, and even cause the satellite to fail to work normally. [0003] When the spaceborne antenna is in orbit, the internal temperature change is caused by the heat flow outside the orbit and the change of the internal heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 洪元朱敏波周旭陈伟李志中王帅
Owner SPACE STAR TECH CO LTD
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