摘要
空间太阳望远镜(SST)是我国独立发展的太阳磁场观测科学卫星;其主光学望远镜8个CCD以20M B/s的速率采集太阳偏振磁图;图像处理系统需要进行图像积分、CCD辐射劣化校正、目标的几何改正、Stokes参数计算和图像格式化等处理.SST在轨实时数据运算量达每秒数十亿次,我国现有星载计算机系统的处理能力远远达不到SST的需求.针对这一问题,在系统处理任务分析的基础上,设计出了并行阵列处理的系统体系结构,并在单通道子系统样机的研制上,采用了FPGA加DSP的模块结构,在FPGA内设计了在线实时积分器,由DSP进行离线计算和格式化处理;还给出了DSP软件流程图;进行了系统仿真和原理样机的制作,经测试表明:该系统达到了SST的星载高速数据处理要求.这种新型高速数据处理方法,可以广泛应用于我国未来航天的高速数据处理领域.
Space Solar Telescope （SST） is a magnetic field observation satellite. Its 8 CCDs of Main Optical Telescope （MOT） collect solar magnetic images with a velocity of 20 MB/s; Data processing system deals with such process as image integral, CCD calibration, object geometric correction, calculation of Stokes parameters and image formatting. SST＇s on-board real-time data calculation volume is several billion times per second, and current on-board computer system can＇t complete SST＇s tasks. On the basis of system processing tasks analysis, a parallel array processing system architecture is presented; During single channel subsystem development, FPGA and DSP module parallel array structure is adopted, in which the on-line real-time integrator is designed inside FPGA, and off-line calculation and image formatting is performed by DSP; DSP＇s software flowchart is also presented; System functional prototype is emulated and proved. The new highspeed data processing method can be also used in future space high-speed data processing fields.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2005年第5期630-635,共6页
Journal of China University of Mining & Technology
基金
863计划(8632.5.1.25)
