A data processing unit of a space star sensor

Abstract

The invention discloses a data processing unit of a space star sensor. A driving module drives a photoelectric detector to generate a star image; in a star image processing module, the star image is processed and converted into star image data, star point image data and star point mass center data; a temperature collecting module collects and uploads temperature data to a communication protocol module; an attitude data collecting module collects and uploads attitude data to the communication protocol module; a work state word collecting module collects and uploads work state words to the communication protocol module; an LVDS (Low Voltage Differential Signaling) data collecting module completes collection of the temperature data, attitude data, work state word, star point image data and star point mass center data according to LVDS communication protocols; an image collecting module completes star image data collection according to Camrlink real-time image collection interface protocols. The high-speed real-time transmission and processing on space star sensor data can be realized; the advantages of low power consumption, high reliability and good time synchronization are realized.

Description

technical field [0001] The invention relates to data processing technology, in particular to a data processing unit of a space star sensor. Background technique [0002] With the improvement of the attitude control accuracy requirements of various satellites and aircrafts, the space star sensor is used as a key measurement stand-alone in the attitude and orbit control subsystem, and its performance directly affects the attitude positioning accuracy of each platform. [0003] To improve the attitude measurement accuracy of space star sensors, researches are mainly carried out from two aspects, one is to reduce the high-frequency errors of star sensors, and the other is to suppress the high-frequency errors of star sensors. Selecting a detector with a large area array and high signal-to-noise ratio can improve the angular resolution of the star sensor and reduce the high-frequency error of the star sensor. However, the star map data produced by detectors with large area array...

AI Technical Summary

Problems solved by technology

[0004] The traditional design uses CPU for star map preprocessing, and its computer mechanism determines that the data processing lacks real-time performance. The external interface uses RS422 serial port, usually with a baud rate of 115200, and it is difficult to obtain rich solution data. The 1553B interface is selected. Data throughput can only reach about 1Mbps

However, the data update rate of the current space star sensor generally requires 5-10 Hz. If the above-mentioned data processing method is still used, it is obviously unable to meet the design index requirements.

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