Follow-up light shield control system of space remote sensor

Abstract

The present invention discloses a follow-up light shield control system of a space remote sensor. The opening of the light shield is a 45-DEG chamfer-shaped member. In operation of the system, a solar sensor is utilized for detecting an azimuth of the sun relative to the light shield, and the real-time azimuth information is transmitted to the control system; the control system calculates a required rotation angle of the light shield according to the obtained sun position information, and drives the light shield to rotate to an ideal shielding position through driving a stepping motor. At the ideal shielding position, the long edge of the light shield body faces the sun, and the short edge opposes the sun. The problems of stray light and heat flow caused by the sun can be settled fundamentally.

Description

technical field [0001] The invention relates to a follow-up control system for an outer shading cover of a space remote sensor, in particular to a follow-up control system for an outer shading cover that can reduce the problems of stray light and heat flow caused by incident sunlight through the follow-up function system. Background technique [0002] The sun is the most important stray light source in the space optical system. Therefore, the ability of the outer shading cover of the space remote sensor to suppress stray light caused by solar intrusion directly affects the imaging quality of the optical system. At present, space remote sensors generally use straight-shaped hoods. This structure will cause two problems: [0003] 1) When the sun is at the oblique front position of the sunshade, part of the sun's rays will hit the inner wall of the sunshade, and will enter the optical system after multiple reflections, causing stray light problems. [0004] 2) The light hitt...

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Problems solved by technology

[0003] 1) When the sun is in the oblique front position of the sunshade, some of the sun's rays will hit the inner wall of the sunshade, and will enter the optical system after multiple reflections, causing stray light problems

[0004] 2) The light hitting the inner wall of the hood will cause the local temperature distribution of the hood to be uneven, causing heat flow problems

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