A High Precision Star Sensor Information Processing System

Abstract

The invention discloses a high-precision information processing system for a star sensor. According to the high-precision information processing system, a FPGA module comprises a photoelectric detector time sequence generator module, an image processing module, a protocol layer data interaction control module, a CPU collaborative working interface module, a data management module and a precision temperature control module, wherein the photoelectric detector time sequence generator module is used for transmitting a detector driving signal, the image processing module is used for receiving and processing star map data output by a detector, the protocol layer data interaction control module is used for carrying out protocol interaction with external equipment, the CPU collaborative working interface module is connected to an external CPU processor, and the data management module is used for managing various data packages. The high-precision information processing system has the advantagesthat the calculation load of a CPU is shared, and the parallel information processing capability is remarkably improved; the time sequence control, image background estimation and star point mass center extraction of the photoelectric detector are completed in real time, so that the requirements of real-time image processing and anti-stray-light high-reliability image processing strategies are met; and the temperature of the detector is acquired in real time, a precision temperature control technology for a semiconductor refrigerator is achieved, the integration degree of a circuit system isimproved, the cost is conveniently lowered, the product miniaturization is facilitated, and the measurement precision of the star sensor is improved.

Description

technical field [0001] The invention relates to the field of star sensors, in particular to a high-precision star sensor information processing system. Background technique [0002] The star sensor is one of the key measurement mechanisms of the spacecraft attitude and orbit control system. It is used to measure the component of the star vector in the star sensor coordinate system. It is identified through the star map and uses the precise position of the known star to determine the satellite relative position. The three-axis attitude in the inertial coordinate system. Star sensors are usually composed of sophisticated optical and structural systems, photoelectric detection and signal processing circuits, and software. [0003] The attitude measurement error of the star sensor is mainly determined by the field of view, the number of detector pixels, the error of star point position extraction and the average number of star points in the field of view. High-precision star s...

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Problems solved by technology

[0005] In the prior art, it has not been disclosed that the photodetector timing generator, image processing, protocol layer data interaction control, CPU cooperative work interface, data management and precise temperature control are all integrated into FPGA to realize the high-precision star sensor information processing system. content

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