Design method for installation and pointing of single-field star sensor in sun-synchronous orbit satellite

Abstract

The invention discloses a sun-synchronous orbital satellite single view field star sensor installation direction design method. The method provides a vector model of stray light and a satellite body coordinate system during a satellite in-orbit operation period. The model can analyze vector relations between the stray light and the satellite body coordinate system during the satellite in-orbit operation period, and through establishing a boundary curve mathematical equation of the stray light and the satellite body coordinate system in different working conditions, a star sensor direction equation under a single view field star sensor installation condition is solved, and a star sensor lens hood is designed with a maximum sunlight shielded angle and a geogas light shielded angle in order to restrain stray light in different direction conditions. The method is advantaged in that the method solves a problem that installation directions of a star sensor of a sun-synchronous orbit spacecraft is influenced in order to prevent stray light, and provides theoretical basis for design of the maximum sunlight shielded angle and the geogas light shielded angle of the single view field star sensor in different installation direction conditions.

Description

technical field [0001] The invention relates to the field of spacecraft attitude measurement, in particular to a design method for installation and pointing of a single-field star sensor of a sun-synchronous orbit satellite. Background technique [0002] As a spacecraft attitude measurement device, star sensors use stars as attitude measurement references. Compared with other satellite attitude sensors (sun sensors, gyroscopes, magnetometers, etc.), they have high precision, no drift, low power consumption, and The advantage of outputting absolute attitude information is that it is currently the most widely used attitude sensor. During the operation of the satellite, the star sensor may be interfered by sunlight or atmospheric light, which will increase the background noise of the image plane of the star sensor, affect the accuracy of star point extraction, and even the star point will be submerged in the background stray light , causing the star sensor not to work properly...

AI Technical Summary

Problems solved by technology

In terms of research on star sensor installation and pointing methods, many research institutions have proposed design methods for practical applications. Among them, in view of the various working conditions and attitude conditions of satellites, Aerospace Dongfanghong proposed the installation angle of star sensors based on mission planning in 2010 The determination method can solve the installation and pointing problem of a given star sensor under agile maneuvering conditions, but this method determines the appropriate installation angle of the star sensor by continuously adjusting the installation angle of the star sensor and the working conditions, and the design method is very complicated. It is impossible to calculate and give the maximum sunlight and earth-atmospheric light shading angle of the star sensor hood under different installation pointing conditions

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