System and method for testing equivalent emissivity of electrically controlled heat shield

Abstract

The invention provides a system and a method for testing equivalent emissivity of an electrically controlled heat shield. The system comprises an electrically controlled heat shield mounting bottom plate, a thermocouple temperature measuring system, an electric heating system, a multi-layer thermal insulation assembly and a low-temperature vacuum container. The method comprises the following steps: respectively measuring the heating power and temperature of the electrically controlled heat shield mounting bottom plate when the multiple layers of the electrically controlled heat shield are opened to different positions, and calculating the equivalent emissivity of a thermal control coating of the electrically controlled heat shield mounting bottom plate according to an equivalent emissivity calculation formula, so as to obtain a relationship of T-epsilon eff. According to the system and the method disclosed by the invention, the problem of measurement of the equivalent emissivity of the electrically controlled heat shield is solved, accurate input parameters are provided for an electrically controlled heat shield mathematical model established for performing thermal analysis and calculation on the electrically controlled heat shield and a spacecraft thermal control subsystem according to test data acquired by the method, the design accuracy of the electrically controlled heat shield and the thermal control subsystem is guaranteed, and a technical support is provided for application of the electrically controlled heat shield on the spacecraft.

Description

technical field [0001] The present invention relates to a test method, in particular to the equivalent emissivity ε of an electronically controlled heat shield used on a satellite eff Test system and method. Background technique [0002] With the development of satellite technology, especially for the current various follow-up satellites and satellites under planning, the traditional thermal control methods mainly rely on passive control because of the large number of on-board equipment, high measurement accuracy, large heat generation, and high temperature control requirements. It can no longer be fully adapted, and the active adjustment ability of the system must be further improved through new thermal control technology to improve temperature conditions. The electronically controlled heat shield is a new type of thermal control technology, which drives the opening and closing of multiple layers through the mechanism part, thereby controlling the heat dissipation surface ...

AI Technical Summary

Problems solved by technology

Therefore, if the parameter is inaccurate, it is impossible to accurately analyze the influence of the opening and closing of the electronically controlled heat shield on the temperature of the satellite, and thus it is impossible to accurately predict the effect of the electronically controlled heat shield on orbit.

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