A combined heat-insulating shading structure for a star sensor

Abstract

The invention discloses a combined heat-insulating shading cover structure for a star sensor, which comprises a cover body, a support and a light-blocking ring; the cover body and the support are both hollow cylinders, the light-blocking ring is a split hollow ring, and the cover body One end is equipped with a light blocking ring for heat dissipation and light extinction, and the other end of the cover is equipped with a support for assembling the optical machine circuit box of the star sensor. The invention optimizes the structure of the star sensor shading cover through the combination of the cover body and the support, and makes up for the defects of the traditional star sensor such as complex structure, excessive weight, complicated disassembly and assembly, and excessive heat transfer; The configuration suppresses space orbit stray light and space orbit heat flow, and overcomes the problem of excessive heat absorption of traditional star sensor shading.

Description

technical field [0001] The invention relates to a combined heat-insulating shading structure for a star sensor, which is especially suitable for the installation of the optical machine circuit box of the shading cover of the star sensor, and belongs to the technical field of the shading structure and thermal design of the star sensor. Background technique [0002] The star sensor is a high-precision spacecraft attitude measurement stand-alone machine, which takes the stable optical signal of the star as the input, and the three-axis attitude information of the star sensor body relative to the earth-centered inertial coordinate system as the output. When the spacecraft is in orbit, it will inevitably be interfered by stray light sources such as sunlight, moonlight, atmospheric light, and scattered light from the outer surface of the spacecraft, and the light energy of stars is relatively weak. Therefore, the stray light will affect the star sensor. affect normal work. The ho...

AI Technical Summary

Problems solved by technology

Under light conditions, the extinction coating with high absorption rate causes the hood to absorb too much orbital heat flow. If the thermal design is unreasonable, the heat will flow into the optical-mechanical circuit box of the star sensor through the hood, causing the temperature of the optical lens and detector to rise. High, also not conducive to the normal work of the star sensor

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