Heavenly body sensor measuring basis transform method and apparatus thereof

Abstract

This invention discloses a sort of measuring benchmark conversion method of the astronomical sensing device. The lamp-house simulator, the three-axes rotating floor and the photoelectric autocollimator shelves are fixed in the optical table, the astronomical sensing device is fixed in the inner frame of the three-axes rotating floor. A. Adjust the photoelectric autocollimator shelf and make the light axis to parallel with the inner frame of the rotating shaft. B. The middle frame and the outer frame of the rotational rotating floor obtain the data of the fixed point in different angle, and demarcate the inner parameter and outer parameter of the astronomical sensing device. Ensure the conversion matrix which is from the coordinate of the rotating floor to the coordinate of the astronomical sensing device. C. Measure the vector relation between the vertical vector of the two reflecting surface of the mirror cube and the light axes of the photoelectric autocollimator. Compute the conversion matrix which is from the coordinate of the rotating floor to the coordinate of the mirror cube. D. Compute the conversion matrix which is from the coordinate of the astronomical sensing device to the coordinate of the mirror cube. The product between the ray vectors of the astronomical sensing device and the conversion matrix is the vector direction after conversion. This invention discloses a sort of set which can realize the above method at the same time. The realization of this invention is simple and its precision is high.

Description

technical field [0001] The invention relates to astronomical sensor measurement technology, in particular to a method and device for converting astronomical sensor measurement reference. Background technique [0002] The celestial sensor is sensitive to stellar radiation and obtains the orientation of the spacecraft relative to the star. Typical celestial sensors include sun sensors, star sensors and earth sensors, which are mainly used to measure the line of sight of stars and a certain body axis of the spacecraft. or the angle between the planes. The direction of the light vector directly measured by the astrosensor is defined in the measurement coordinate system of the astrosensor, or in other words, the measurement coordinate system of the astrosensor is used as the measurement reference. In order to convert the directly measured light vector direction to the motion carrier coordinate system in actual use, it is necessary to establish an observable measurement datum on ...

AI Technical Summary

Problems solved by technology

This method needs to install the mirror cube to a reference position that has a strict and accurate position relationship with the coordinate system of the celestial sensor, which not only depends on the accuracy of machining, but also depends on the accuracy of installation, which makes the processing difficult and the installation process complicated. , and since the measurement coordinate system of the astrosensor is invisible, it is difficult to direct high-precision positioning mechanically, resulting in low precision of datum conversion

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