Method for measuring deviation between digital sun sensor measuring coordinate system and prism coordinate system

Abstract

The invention provides a method for measuring a deviation between a digital sun sensor measuring coordinate system and a prism coordinate system. The method includes installing a digital sun sensor on a high precision three-axle table, using a solar simulator for simulating solar ray vector to irradiate the digital sun sensor, using a theodolite for measuring the deviation of Z-axis in the prism coordinate system of the digital sun sensor relative to the Z-axis of the measuring coordinate system, and using two theodolites for measuring the deviation of X-axis in the prism coordinate system of the digital sun sensor relative to the X-axis of the measuring coordinate system and the deviation of Y-axis in the prism coordinate system of the digital sun sensor relative to the Y-axis of the measuring coordinate system. The measuring coordinate system of a detector optical filter and the prism coordinate system are connected by means of light measuring mode, and the measuring of the coordinate system relationship is completed on the ground. The measured deviation between the coordinate systems can be used for arranging and installing the satellite directly, and can be provided for the attitude and orbit control system to amend the inflight measuring coordinate system directly. The method has high reliability, high credibility, and high enforceability.

Description

technical field [0001] The invention relates to opto-mechanical-electrical integration technology and opto-mechanical-electrical measurement technology, in particular to a method for measuring the deviation between a measurement coordinate system of a digital sun sensor and a prism coordinate system. Background technique [0002] The digital sun sensor is an instrument used to measure the angle between the sun vector and the body axis of spacecraft such as satellites. The digital sun sensor can judge the presence or absence of the sun in a given field of view for the spacecraft, and keep the satellite oriented to the sun (inertial space orientation) during full-attitude capture to ensure the energy supply on the star. It can also be used for other higher High-precision attitude measurement sensors (such as star sensors, ultraviolet sensors, infrared earth sensors, etc.) Protective control of the sensor and the infrared horizon for the sun's incident light, generate switch a...

AI Technical Summary

Problems solved by technology

[0003] During the use of the digital sun sensor, because of the ambiguity of the deviation relationship between the prism coordinate system and the prism coordinate system, the measurement accuracy deviation relative to the two-axis attitude of the spacecraft needs to be corrected by on-orbit recalibration to eliminate the deviation. It caused a series of problems such as large deviation of on-orbit data and complicated on-orbit correction.

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