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为了完成快速高概率的捕获,设计并构建了自由空间激光通信捕获控制系统,主要由主控计算机、GPS/INS捷联导航系统、数传电台和控制软件等部分组成。主控计算机采用嵌入式操作系统Windows CE,控制系统采用多线程同步技术和事件驱动方式处理多个通信串口的数据,减少了处理数据的延迟时间;同时,系统采用快速高精度指向算法,实现高精度的粗对准;使用复合光栅螺旋扫描方式和可对速度补偿的捕获算法,减少了捕获时间,提高了捕获概率。基于野外试验数据对捕获控制系统性能进行分析评估。结果表明,系统指向误差小于1°,捕获时间小于30s。目前,该系统已经研制完成并投入使用,效果良好。
In order to achieve fast and high-probability capture, a free-space laser communication capture control system is designed and built. It is mainly composed of main control computer, GPS / INS strapdown navigation system, digital radio and control software. Host computer using embedded operating system Windows CE, the control system uses multi-threaded synchronization technology and event-driven approach to deal with the data of multiple communication serial port, reducing the processing time delay of data; the same time, the system uses fast high-precision pointing algorithm to achieve high Precision coarse alignment; the use of composite grating spiral scanning and speed compensation can capture algorithms to reduce the capture time and improve the capture probability. The performance of capture control system was analyzed and evaluated based on the field test data. The results show that the systematic pointing error is less than 1 ° and the acquisition time is less than 30s. At present, the system has been developed and put into use, the effect is good.