Star sensor low-frequency error compensation method based on landmark information

A star sensor, low-frequency error technology, applied in the field of satellite attitude control

Active Publication Date: 2012-06-20
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0006] The technical solution problem of the present invention is: overcome the adverse effect of star sensor low-frequency error on satellite attitude determination accuracy, provide a kind of star senso

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  • Star sensor low-frequency error compensation method based on landmark information
  • Star sensor low-frequency error compensation method based on landmark information
  • Star sensor low-frequency error compensation method based on landmark information

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Embodiment Construction

[0042] In the embodiment of the present invention, according to the landmark measurement information on a time series provided by the payload, the least square algorithm is used to estimate and compensate the low-frequency error of the star sensor.

[0043] 1. Basic ideas

[0044] The low-frequency error of the star sensor is one of the main factors affecting the determination of the satellite attitude and the high-precision orientation of the payload. Satellite payloads with imaging capabilities (such as cameras or telescopes) have the ability to obtain landmark direction vector data, and their measurement accuracy is high, which can be used as an attitude reference to estimate and compensate for low-frequency errors of star sensors. The low frequency error of star sensor can be expressed in the form of Fourier series. In order to weaken the influence of the low-frequency error of the star sensor on the satellite attitude determination accuracy, according to the landmark mea...

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Abstract

A star sensor low-frequency error compensation method based on landmark information solves the problem that determination precision of satellite attitude is affected by low-frequency error of star sensors, utilizes the recursive least square algorithm to evaluate and compensate the low-frequency error of the star sensors according to the landmark measurement information which is on one time sequence and provided by an effective load. By the star sensor low-frequency error compensation method based on landmark information, determination precision of the satellite attitude is increased. Due to the fact that the satellite attitude determination data serve for the effective load, the compensation for the low-frequency error of the star sensors is carried out by the reference of the effective load, so that the attitude information output from a satellite attitude determination system is consistent with the effective load and then orientation variation of the effective load can be reflected accurately.

Description

technical field [0001] The invention belongs to the field of satellite attitude control, and relates to a low-frequency error compensation method of a star sensor for improving satellite attitude determination accuracy. Background technique [0002] In order to ensure that the payload on the earth observation satellite obtains high-precision images, it is required that the satellite attitude determination system can accurately provide satellite attitude information. High-precision pointing satellites widely use the satellite attitude determination method composed of star sensors and gyroscopes, that is, the star sensors and gyroscopes are used as measurement components, and the Kalman filter algorithm is used to process sensor measurement information combined with satellite attitude kinematic equations to realize satellite attitude determination. Real-time estimation of attitude error and gyro drift error, correction of satellite attitude data obtained by recursive gyro obse...

Claims

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Application Information

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IPC IPC(8): G01C25/00
Inventor 熊凯汤亮刘一武
Owner BEIJING INST OF CONTROL ENG
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