Multiple star image and attitude associated star sensor internal parameter calibration method and device thereof

A technology of star sensor and calibration method, applied in measurement devices, instruments, etc., can solve problems such as poor calibration accuracy, failure to fully consider the true statistical characteristics of star angular distance errors, and non-optimal estimation, etc., to facilitate implementation and improve calibration. Accuracy and reliability, the effect of simplifying the calibration process

Active Publication Date: 2017-12-08
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, this method does not fully consider the real statistical characteristics of the star angular distance error, an...

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  • Multiple star image and attitude associated star sensor internal parameter calibration method and device thereof
  • Multiple star image and attitude associated star sensor internal parameter calibration method and device thereof
  • Multiple star image and attitude associated star sensor internal parameter calibration method and device thereof

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Embodiment Construction

[0119] The present invention will be described in further detail below in conjunction with accompanying drawing and example;

[0120] The star sensor internal parameter calibration device adopted by the present invention is as follows: figure 1 As shown, it consists of a gyro assembly 1, a star sensor to be calibrated 2, a GPS antenna 3, a GPS receiver 4, and a data processing computer 5. The gyro assembly 1 and the star sensor 2 to be calibrated are rigidly installed, and the rigidly installed gyro assembly 1 and the star sensor 2 are referred to as the star-inertia combination system for short below; the GPS antenna 3 and the GPS receiver 4 communication; the gyro assembly 1 communicates with the GPS receiver 4; the star sensor 2 to be measured communicates with the GPS receiver 4, and utilizes the Coordinated Universal Time (UTC) time obtained by the GPS receiver 4 to collect The information can realize the time synchronization of the gyro assembly 1 and the star sensor 2 ...

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Abstract

The invention discloses a multiple star image and attitude associated star sensor internal parameter calibration method and a device thereof. A GPS antenna 3, a gyroscope unit 1 and a to-be-calibrated star sensor 2 communicate with a GPS receiver 4 respectively, and a data processing computer 5 is connected with the gyroscope unit 1 and the to-be-calibrated star sensor 2 respectively; synchronous data acquisition of the gyroscope unit 1 and the star sensor 2 is realized by virtue of UTC (universal time coordinated) time information acquired by the GPS receiver 5, and calibration algorithm solution of the to-be-calibrated star sensor 2 is completed in the data processing computer 5. According to the method, the gyroscope unit is used for providing accurate rotating angle information to implement splicing association of a plurality of frames of star images, thereby increasing observed data samples for internal parameter calibration of the star sensor; the method can be used for calibration under a dynamic condition, no strict requirements are made to the motion state of the to-be-calibrated star sensor 2, the calibration accuracy and reliability are improved, a calibration flow is simplified, dynamic calibration of the to-be-calibrated star sensor 2 can be conveniently implemented, and the method and the device are also applied to calibration of an inertial/celestial combined navigation system.

Description

technical field [0001] The invention relates to a method for calibrating internal parameters of a star sensor and a device thereof in the field of aerospace measurement; in particular, it relates to a method for calibrating an internal parameter of a star sensor with an attitude-related frame and a special device thereof. Background technique [0002] The star sensor is one of the core sensors of the attitude control of the spacecraft. It realizes the measurement of the attitude of the spacecraft through the incident angle information of the sensitive starlight. The precise calibration of parameters such as the focal length of the optical lens, the principal point, and the distortion (collectively referred to as internal parameters) is the premise and key to the high-precision attitude measurement of the star sensor. Therefore, the star sensor must be strictly calibrated on the ground before it is put into use. . [0003] my country's national military standard "Star Sensor...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 戴东凯刘宇马丽衡秦石乔王省书吴伟郑佳兴黄宗升魏文俭
Owner NAT UNIV OF DEFENSE TECH
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