Method for forecasting extreme working conditions of in-orbit temperatures of spaceborne antenna

Abstract

The invention discloses a method for forecasting extreme working conditions of in-orbit temperatures of a spaceborne antenna. The method comprises the steps of (1) calculating the change rule of the incident angles beta of the sun relative to an orbit plane within one year through given orbit parameters, (2) calculating a shined factor through the change rule of the angles beta within the year according to the parameters given in the step (1) and then determining whether a shadow moment exists within one period, (3) forecasting the extreme low-temperature working condition of the spaceborne antenna according to the existence of the shadow moment or not determined in the step (2), (4) forecasting the extreme high-temperature working condition of the spaceborne antenna according to the existence of the shadow moment or not determined in the step (2), (5) comparing each extreme temperature working condition with temperatures of 2 days and 5 days before and after the data of the working condition, and taking the temperature in the temperature working condition TMax as the extreme high-temperature working condition and the temperature in the temperature working condition TMin as the extreme low-temperature working condition. The method targets at the spaceborne antenna, and is capable of determining the shined factor of the orbit within the year by calculating the change rule of the incident angles beta of the sun relative to the orbit plane and then determining the dates of the extreme working conditions of the orbit; as a result, the extreme temperatures of the spaceborne antenna are calculated by loading an extremum heat flow by an envelope method, and then the purpose of forecasting the extreme working conditions of the spaceborne antenna is achieved.

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...

AI Technical Summary

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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