Star sensor reference cube-prism installation error calibration apparatus

Abstract

The present invention belongs to the technical field of optoelectronic equipment calibration, and particularly relates to a star sensor reference cube-prism installation error calibration apparatus. According to the present invention, a photoelectric autocollimator and a single star simulator are respectively placed on two orthogonal axes of a reference plane, a detected star senor is placed at the intersection point position of the two axes so as to make the normal lines of the two orthogonal light reflection surfaces of the detected star senor reference prism be respectively parallel to the two orthogonal axes, the optical axes of the photoelectric autocollimator and the single star simulator are respectively adjusted to parallel to the reference plane through a theodolite, the star sensor is installed on a star sensor three-dimensional adjustment reference base, the input optical axis of the star sensor and the output optical axis of the single star simulator are adjusted to achieve a parallel state through the star sensor three-dimensional adjustment reference base, a detected reference cube-prism is arranged on the upper surface of the housing of the detected star senor, the installation angle error of the reference cube-prism round the X-axis and the Y-axis is measured by using photoelectric autocollimation, the star sensor three-dimensional adjustment reference base rotates 90 DEG, and the installation angle error of the reference cube-prism round the Z-axis is measured.

Description

technical field [0001] The invention belongs to the technical field of photoelectric equipment calibration, and in particular relates to a calibration device for installation errors of star sensor reference cube mirrors. Background technique [0002] As a high-precision space attitude optical sensor, the star sensor has been widely and deeply used in the aerospace field. Since the measurement coordinate system of the star sensor is virtual and invisible, it is necessary to accurately measure the position and attitude relationship between the measurement coordinate system of the star sensor and the coordinate system of the reference cube mirror on its shell during ground assembly, that is, the installation of the reference cube mirror error. That is, the geometric installation accuracy requirements of the star sensor on the spacecraft are realized by measuring the reference cube mirror on the star sensor. [0003] At present, there are mainly two methods for calibrating the...

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Problems solved by technology

[0004] Due to the large diameter of the light tube objective lens in the large-aperture light tube measurement method, the processing accuracy is difficult to guarantee and the processing cost is high

In addition, due to off-axis light measurement, aberrations such as chromatic aberration and spherical aberration after the optical path passes through the optical system will cause a certain loss of measurement accuracy, which cannot meet the requirements of high-precision measurement

Secondly, this measurement method can only measure the installation error between the star sensor and the reference cube in the pitch and azimuth directions, but cannot measure the installation error in the roll direction.

[0005] The combined measurement method of light pipe and star simulator Although the larger-diameter light pipe measurement method improves the measurement accuracy, it still cannot measure the installation error in the roll direction

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