A method for use a low-inclination satellite star sensor

Abstract

A method for use that star sensor of low-inclination satellite includes determine the number of star sensors and mounting layout accord to the constraint of the sun inhibition angle and the earth inhibition angle of the star sensor, determining the number of star sensors and the mounting layout of the star sensors according to the constraint of the sun inhibition angle and the earth inhibition angle of the star sensor. On the premise of ensuring the energy supply, the attitude of the satellite is designed to ensure the availability of the star sensor. The method can enhance the star sensor's ability to restrain stray light such as sunlight and earth-air light, and improve the star sensor's on-orbit availability, thus ensuring the satellite's attitude determination accuracy and improving the satellite's mission execution ability.

Description

technical field [0001] The invention relates to the technical field of spacecraft attitude control. Specifically, the present invention relates to a method for using a star sensor suitable for low-inclination satellites. Background technique [0002] The star sensor is a high-precision optical sensor with the star as the attitude reference light source, and it is an important attitude measurement component in the spacecraft control system. Since the star light source is a weak light, the interference of stray light such as sunlight, earth atmosphere light, and moon atmosphere light will affect the measurement accuracy of the star sensor, and even cause the star sensor to be unusable, which seriously affects the performance of the star sensor. On-orbit availability. [0003] Although a hood is installed in front of the lens of the star sensor, it can only prevent a certain amount of stray light interference, and low-inclination satellites are more likely to be interfered by...

AI Technical Summary

Problems solved by technology

Since the star light source is a weak light, the interference of stray light such as sunlight, earth atmosphere light, and moon atmosphere light will affect the measurement accuracy of the star sensor, and even cause the star sensor to be unusable, which seriously affects the performance of the star sensor. On-orbit availability

[0003] Although a hood is installed in front of the lens of the star sensor, it can only prevent a certain amount of stray light interference, and low-inclination satellites are more likely to be interfered by stray light such as sunlight and atmospheric light due to their orbits. A single star sensor cannot guarantee that it will always be available in orbit, resulting in the inability of the satellite to perform high-precision attitude determination all the time, which has caused certain limitations to the satellite's mission execution

[0004] Aiming at the problem that the star sensor is susceptible to stray light interference, there are mainly two traditional methods, one is to improve the design of the hood, increase the length of the hood or increase the number of stages of the hood, this method can improve to a certain extent The ability of the star sensor to stray light, but the room for improvement is relatively limited, and the stray light near and beyond the hood cannot be suppressed very well; Astigmatism suppression is the largest installation position, but this method also has limitations, that is, it can only suppress the entry of stray light at a specific angle, and cannot guarantee that the star sensor will be free from stray light interference for a long time

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