DSP and FPGA parallel multi-mode star image processing method for star sensor

Abstract

The invention discloses a DSP and FPGA parallel multi-mode star image processing method for a star sensor, the processing algorithm of a star image is classified and optimized according to different working modes of the star sensor, and star image processing can be completed jointly by the DSP and the FPGA. The method comprises the following steps: under a capture mode, the FPGA completes image filtering processing to obtain a quasi star point pixel, and the DSP performs capture mode processing on the quasi star point pixel; under non-high-dynamic tracking mode, the FPGA completes image window intercepting processing, and the DSP performs non-high-dynamic tracking mode processing on a window pixel; under a high-dynamic mode, the FPGA completes the image window intercepting processing while performing pixel binning, and the SP performs non-high-dynamic tracking mode processing on the window pixel; star image data preprocessed by the FPGA can be directly stored in the chip of the FPGA, and an external image memory is not needed. According to the method, the star image processing speed is effectively increased on the premise that the accuracy is not affected, and the system configuration is simplified.

Description

technical field [0001] The invention relates to a star map processing method, in particular to a DSP and FPGA parallel multi-mode star map processing method for a star sensor, which can efficiently complete the star map processing. Background technique [0002] As a high-precision attitude measurement component, the star sensor is widely used in satellites, spaceships and other spacecraft. The basic principle is to use an image sensor to capture star images, and obtain the three-axis inertial attitude of the spacecraft through star image processing. With the development of technology, more and more stringent requirements are put forward for the star sensor's data update rate, dynamic performance, volume, power consumption and other indicators. [0003] At present, the star sensor basically uses a digital system composed of DSP and FPGA to complete the picture control and image processing. Usually, the sequential logic function is realized by FPGA, while the image processin...

AI Technical Summary

Problems solved by technology

However, due to the limitation of device performance level, cost and design complexity, the improvement of processing speed is limited

There are also design researches related to FPGA star image processing at home and abroad, but they are not closely integrated with the working mode of the star sensor or are different from the processing method given in this patent, and cannot fully utilize the advantages of DSP and FPGA parallel processing, even for star sensor. Sensor measurement accuracy and other performance impact

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