Operation mode design of multi-FOV star sensor
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摘要: 针对多视场星敏感器的特点设计了两种工作模式:高精度工作模式和高更新率工作模式.中央时序控制器根据指令完成工作模式配置,以相应的时序启动图像采集处理模块.结合工作模式的时序特点,在FPGA(Field Programmable Gate Array)内部设计了3个星点质心提取模块,与各自对应的图像采集模块同步运行,实现了两种工作模式下多视场星图快速质心提取.采用Cypress公司的IBIS5-A-1300作为图像传感器,基于FPGA设计了实验平台,对工作模式配置及数据更新率进行测试.实验结果表明:工作模式可灵活配置和切换,在高更新率工作模式下,星敏感器的数据更新率为传统单视场情况的3倍.Abstract: Two operation modes, namely high precision operation mode and high update operation mode, were designed in view of the characteristics of the multi-filed of view(FOV) star sensor. The central timing controller accomplish its operation mode configuration according to the instructions and starts image acquisition and processing module in the appropriate timing. With the timing characteristics of operation mode, the multi-FOV image fast centroid extraction in two operation modes was achieved by designing in field programmable gate array (FPGA) three centroid extraction modules, which implement simultaneously with their own corresponding image acquisition modules. The operation mode configuration and data update rate were tested on the experimental platform which was designed based on FPGA, with IBIS5-A-1300 of Cypress as the image sensor. Results show that the star sensor can be configured and switched normally and flexibly through the instructions, and that the data update rate is up to three times of that of the traditional star sensor.
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Key words:
- star sensor /
- multi- filed of view /
- operation mode /
- field programmable gate array
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