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Star sensor calibrator and method for calibrating high-precision star sensor

A technology of star sensor and calibration device, applied in the direction of measuring device, instrument, etc., can solve the problems of difficulty in reaching star sensor, calibration accuracy, installation accuracy and rotation accuracy limit, etc.

Inactive Publication Date: 2010-04-28
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The disadvantage of this method is that it collects star point data by continuously rotating the two-dimensional turntable, so the calibration accuracy is limited by the installation accuracy and rotation accuracy of the two-dimensional turntable, and it is difficult to achieve a very high-precision (sub-arc-second level) star sensor requirements

Method used

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  • Star sensor calibrator and method for calibrating high-precision star sensor

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Embodiment

[0025] A single-star simulator 1 is placed on one side of the optical air-cushion platform 7, and a star sensor 8 to be calibrated is placed on the other side of the optical air-cushion platform 7. There is a two-dimensional adjustable plane mirror 2 on the corner, the angle between the two-dimensional adjustable plane mirror and the optical axis of the single-star simulator is 45°±15°, and the center of the two-dimensional adjustable plane mirror reaches the star to be calibrated. The distance between the sensor is 20cm, the angle between the two-dimensional adjustable plane reflector is 90°±15°, and the distance is 15cm. A high-precision two-dimensional guide rail 5 is provided at 100 cm from the center. The high-precision two-dimensional guide rail can move vertically and horizontally on the optical air cushion platform 7. The laser detector 4 of the laser angle measuring device is installed on the high-precision two-dimensional guide rail 5 , the laser light emitted by the...

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Abstract

The invention discloses a star sensor calibrator and a method for calibrating a high-precision star sensor. The star sensor calibrator has the structure that a two-dimensional adjustable plane mirror is arranged on the optical path between a single-star simulator and a star sensor to be calibrated; the position forming an included angle of 90+ / -15 degrees with the two-dimensional adjustable plane mirror is provided with a laser device of a laser angle measuring device; the position 50-200 cm away from the center of the two-dimensional adjustable plane mirror is provided with a high-precision two-dimensional guide rail which can vertically and horizontally move on an optical hover platform; a laser detector of the laser angle measuring device is installed on the high-precision two-dimensional guide rail; after being reflected by the two-dimensional adjustable plane mirror, the laser emitted by the laser device is incident into the laser detector; and a data processing computer is respectively communicated with the star sensor to be calibrated and the laser detector. The invention does not need to rotate the star sensor, increases the tangential distortion and the deflection angle of the installation error, and can meet the requirements for very-high-precision (sub-arcsec) star sensors. The invention has the advantages of simple method and small amount of calculation.

Description

technical field [0001] The invention relates to a star sensor calibration device in the field of aerospace measurement and a method for calibrating a high-precision star sensor. Background technique [0002] Common star sensor laboratory calibration devices generally include: a single star simulator, a high-precision two-dimensional turntable, a computer, an optical air cushion platform, etc., such as: CN 101013033A discloses "a ground calibration method for star sensors based on an unbiased band ". Usually, a single-star simulator is used with a high-precision two-dimensional turntable for calibration, which generally includes the following steps: (1) The star sensor imaging model is established by the method of overall modeling: the coordinate system is established with the initial position of the two-dimensional turntable, and the set According to the starlight direction and the installation deviation of the star sensor on the two-dimensional turntable, establish the mai...

Claims

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Application Information

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IPC IPC(8): G01C25/00
Inventor 刘海波杨建坤谭吉春常胜利杨俊才李修建宿德志刘菊
Owner NAT UNIV OF DEFENSE TECH
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