Method for processing information of APS sun sensor

Abstract

The invention relates to an information processing method of an APS sun sensor, which comprises two calculating modes of capture and tracking. First, pictures are input in a memory, and initial centroid is extracted. Next, corresponding calculation of sun centroid and a hole number is performed, and then calculation of the attitude capture is performed. After the validity of an attitude angle is verified, a system switches to the tracking mode. Data of the pictures and the tracking mode are loaded, the number of windows participating in calculation is adjusted according to the input of ground remote control parameters. The calculation of the sun centroid is performed in the windows, the results of the centroid calculation are used for the calculation of the attitude angle. Then, the size of the attitude angle is judged, and the big angle compensation is needed if the attitude angle is big. At last, the sun sensor outputs the compensated attitude angle. The invention has attitude capture ability with strong robustness, succeeds in capturing the attitude when partial solar image spots shift out of a target surface, compensates the attitude angle under the big angle, adjusts the calculating quantity, improves the calculation precision of the attitude angle under the big angle, and simultaneously improves the data refresh rate of the sensor.

Description

technical field [0001] The invention relates to an information processing method of an APS sun sensor, belonging to the field of attitude measurement and control. Background technique [0002] The sun sensor to give the sun orientation is an optical attitude sensor commonly used by various spacecraft. With the rapid advancement of imaging detection devices and processor technology, solar sensors have successively appeared 0-1 solar sensors, analog solar sensors, digital solar sensors, CCD (electromagnetic coupling device) solar sensors, and the latest products are currently For APS (Active Pixel Detector) sun sensor. [0003] The APS sun sensor is an imaging sun sensor. It uses the principle of pinhole imaging to form a sun image of a pinhole array. Through image processing technology, the array sun image is processed through image processing and attitude calculation to solve the sun azimuth, so it is fast, robust and accurate. The information processing algorithm belongs ...

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Problems solved by technology

[0004] Chinese Patent No. 200610103797.3, title: A high-precision APS sun sensor, this patent describes the whole sensor, which involves information processing, and its shortcoming is that it does not take into account that part of the sun image spot may move out of the target surface at a large angle situation, and there is no means of adjusting the amount of calculation for all centroids in the algorithm, and finally, the deformation of the sun image spot at a large angle is not processed

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