空间非合作目标在轨光学捕获方法研究

Method of on-orbit optical acquisition for non-cooperative space targets

针对空间非合作目标尺寸和运动特性差异大、现有基于单一特性的捕获方法适应性差的问题,设计了星图信息和运动特性相结合的非合作目标光学捕获方法。并结合硬件电路特性,提出了一种基于DSP+FPGA异构双核目标捕获嵌入式平台架构,解决了在轨应用难题。通过全物理仿真试验对实现的非合作目标嵌入式捕获系统的功能和性能进行了全面测试。结果表明,系统具备1024×1024@20p格式视频的实时处理能力。且对于不同运动速度、不同尺寸的非合作目标均能够准确捕获。采用蒙特卡罗方法随机生成了1000个初始视轴指向进行测试,基于电子星图模拟器和光学星图模拟器的目标捕获正确率均达到99.8%。综合而言,该解决方案的计算精度高,鲁棒性好,适应性强,能够有效应用于执行高精度非合作目标在轨监测和清理等任务。

Due to the differences of targets’size and movement are significant,it is difficult to acquiring the non-cooperative space target based on single characteristic.This paper proposed a high reliable method of non-cooperative space targets acquisition,which combined the characteristics of the star field and the target movement.The matching embedded-system for on-orbit application is designed by DSP+FPGA heterogeneous dual-core architecture.The full physical ground simulation results showed that the proposed system can real-time process the 1024×1024@20p format video,and can successfully acquire the non-cooperative targets with different speeds and sizes.The accuracy of one thousand times random test with Monte-Carlo stochastic simulated director reaches 99.8%,which is verified by both electronic and optical simulators.Totally speaking,this method owned the advantages of high processing speed,robustness and adaptability,which can be applied to non-cooperative space surveillance and cleaning.