Small satellite dynamic thermal analysis modeling method

Abstract

The invention discloses a small satellite dynamic thermal analysis modeling method. Firstly, satellite attitude modeling is performed according to satellite orbit information parameters and attitude parameters; the relative relationship among the satellite, the earth and the sun is obtained; then, based on the discrete outer surface grids, parallel light shielding judgment is carried out, an orbitcalculation process is combined, space outer heat flow is solved, finally, a general heat balance equation is used, radiation heat exchange between satellite surfaces and heat dissipation to a cold background are combined, satellite surface heat exchange boundary conditions are determined, and a continuous temperature field is calculated.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a small satellite dynamic thermal analysis modeling method. Background technique [0002] Satellite thermal control technology is a technology that controls the heat exchange process of the satellite's internal and external environments to keep its thermal equilibrium temperature within the required range, and is an important part of aerospace technology. The thermal control design level and quality of a satellite will affect the working state, life and reliability of the entire satellite. Usually, before thermal control design, detailed thermal analysis is required, which mainly includes three parts: orbital calculation, external heat flow calculation and temperature field calculation. [0003] With the development of space technology, satellites are gradually becoming miniaturized and miniaturized, and microsatellites have become the focus of attention. However, the comple...

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Problems solved by technology

However, the complex orbital thermal environment will cause the low thermal inertia of the microsatellite, and at the same time, the highly integrated electronic equipment also makes the microsatellite have a high heat flux density, which makes it difficult to use the traditional method for thermal analysis of the microsatellite. Problems: When dealing with the calculation of external heat flow, the existing technology does not have enough flexibility and adaptability to deal with complex structures, and the efficiency is not high enough; and in terms of temperature field calculation, the calculation accuracy of the thermal network method is low, and the thermal Network model correction is more difficult

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