Combined heat insulation light shielding cover structure for star sensor

Abstract

The invention discloses a combined heat insulation light shielding cover structure for a star sensor. The structure comprises a cover body, a support seat and a light shielding ring. Each of the coverbody and the support seat is a hollow cylinder. The light shielding ring is a split type hollow circular ring. The light shielding ring used for heat dissipation and light elimination is installed onone end of the cover body. The support seat where a start sensor optical machine circuit box is assembled sleeves the other end of the cover body. According to the invention, by combining the cover body and the support seat, the structure of the star sensor light shielding cover is optimized; defects of complex structure, big weight, tedious assembly and disassembly and excessive heat transmission of the traditional star sensor are overcome; and by designing the light shielding ring, stray light and heat flows of spatial tracks are inhibited and difficulty that the traditional star sensor light shielding cover absorbs too much heat is overcome.

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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