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Data processing system of star sensor

A data processing system and star sensor technology, applied in the field of astronomical navigation, can solve the problems of attitude loss, reduce the data acquisition rate and update rate of star sensors, etc., and achieve the effects of improving reliability, avoiding attitude loss, and high precision

Inactive Publication Date: 2014-05-14
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention solves the problem that when the star sensor is autonomously navigating for a high-mobility carrier, the attitude is easily lost, and the data acquisition rate and update rate of the star sensor are reduced. The present invention provides a star sensor data processing system

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  • Data processing system of star sensor
  • Data processing system of star sensor
  • Data processing system of star sensor

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specific Embodiment approach 1

[0026] Specific implementation mode 1. Combination Figure 1 to Figure 4 Describe this embodiment, the star sensor data processing system, the star sensor data processing system includes an initial attitude measurement module, an initial angular velocity measurement module and a prediction tracking measurement module.

[0027] Initial attitude measurement module;

[0028] The initial attitude measurement module receives the observed star information sent externally, including the star image coordinates and gray values ​​extracted from the star map, and performs all-day autonomous star map identification on the observed star information. In this embodiment, the all-day autonomous star map The recognition method adopts an improved triangle recognition method—the navigation star counting method. If the recognition fails, the initial attitude measurement module is executed cyclically until the recognition is successful. After the recognition is successful, the QUEST method is used...

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Abstract

The invention provides a data processing system of a star sensor and relates to the technical field of celestial navigation. The invention aims to solve the problems that when the star sensor autonomously navigates a highly motorized carrier, the posture loss easily occurs, the acceptance rate and the updating rate of data of the star sensor are reduced, and the like. An initial angular velocity measurement module is additionally arranged in the data processing system, so that an initial posture measurement module and a tracking module can be effectively jointed when the carrier is in a highly-motorized state. The tracking measurement module is improved to be a forecast tracking measurement module, so as to forecast a posture angle of the star sensor and a coordinate of a navigation star in a view field of a next sampling period according to the posture angle and a posture angle speed provided by the initial angular velocity measurement module. Therefore, the window tracking and the posture measurement can be completed. The posture angle and the posture angle speed can be updated by using a posture measurement result of the module, and a forecast tracking function is executed. In the forecast tracking measurement module, a conditional number of distribution of a star map is brought in to help judge the posture measurement precision; when the conditional number of the distribution of the star map is relatively large, the forecast tracking measurement module is triggered to identify a relatively large quantity of navigation stars.

Description

technical field [0001] The invention relates to the technical field of celestial navigation, in particular to a star sensor data processing system, especially a data processing system for star sensors that can be used independently for high-mobility carriers. Background technique [0002] The star sensor is an attitude sensor with a star as the measurement target. Since the 1990s, with the application of large area array CCD and CMOS devices, the large field of view star sensor can accurately provide its own relative to the inertial coordinate system based on the multi-star vector without any external reference information. According to the installation matrix of the star sensor on the carrier, the attitude information of the carrier relative to the inertial coordinate system is obtained. Because the new generation of star sensors has the characteristics of high precision, strong autonomy, and good concealment, it has been widely concerned and researched at home and abroad....

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Application Information

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IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 张磊何昕魏仲慧何家维
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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