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Star sensor calibration device based on external field star observation and star observation calibration method

A star sensor and calibration device technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of limited accuracy of stargazing calibration technology, and achieve the effect of improving calibration accuracy

Active Publication Date: 2020-04-21
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of limited accuracy of existing stargazing calibration technology, and apply the parameter method of laboratory calibration to stargazing calibration to improve the calibration accuracy

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  • Star sensor calibration device based on external field star observation and star observation calibration method
  • Star sensor calibration device based on external field star observation and star observation calibration method
  • Star sensor calibration device based on external field star observation and star observation calibration method

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Embodiment Construction

[0055] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can u...

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Abstract

The invention discloses a star sensor calibration device based on external field star observation and a star observation calibration method thereof. The calibration device comprises a medium-precisionturntable capable of rotating around a zenith, a star sensor arranged on the turntable, and a circuit box connected with the star sensor. The circuit box comprises a data acquisition module and a clock reference module. The calibration method comprises the following steps: step 1, replacing a single-star simulator with starlight, replacing a high-precision turntable with the earth, driving a starsensor through a turntable, simulating a laboratory calibration system, and carrying out a star observation experiment; and step 2, applying a parameter method in laboratory calibration to star observation calibration for data processing; to be specific, constructing an initial alignment error model, compensating an initial alignment error, carrying out nonlinear optimization solution, constructing a distortion correction model, and carrying out least square solution. According to the method provided by the invention, a parameter method in laboratory calibration is applied to star observationcalibration; and especially for a large-field star sensor, the calibration precision is improved.

Description

technical field [0001] The invention relates to a star sensor calibration method, in particular to a star sensor calibration device and a calibration method based on field star observation. Background technique [0002] The ground calibration of star sensors can be divided into laboratory calibration based on turntable and single star simulator and stargazing calibration based on astronomy. [0003] The advantage of stargazing calibration is that there is no need to use expensive high-precision turntables and single-star simulators, and it can replace laboratory calibration within the range of accuracy allowed. [0004] The principle of stargazing calibration is similar to that of laboratory calibration, but the construction of calibration points is different. In the test, the earth is used as a high-precision turntable, and UTC time (Coordinated Universal Time) is regarded as a scale. The rotation speed of the earth is 15.04″ / s, when the timing accuracy is 0.0204ms, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 金荷毛晓楠吴永康余路伟
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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