双层卫星光网络仿真演示系统设计  

Demonstration system design of double-layered optical satellite network

作　　者：李勇军[1] 赵尚弘[1] 吴继礼[1] 朱子行[1] 王翔[1] 赵顾灏[1] 姜晓峰[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《红外与激光工程》2011年第10期1974-1978,共5页Infrared and Laser Engineering

基　　金：国家863计划(2007AA01Z294)

摘　　要：为了精确模拟、演示验证双层卫星光网络星际激光链路的稳定和切换,按1:30的比例设计了分时切换低/中轨道(LEO/MEO:Low Earth Orbit/Medium Earth Orbit)双层卫星光网络实验演示系统。系统由SITL(System-In-the-Loop)模块将硬件平台和计算机仿真平台互联而组成。硬件平台由中心的圆形往复转台上面的2个伺服终端和两侧的4个伺服终端组成,分别模拟LEO卫星和MEO卫星。转台平台角速度为1.28(°)/s,周期为280 s,切换时间为4 s。软件部分由虚拟网络组成,具有灵活的星上路由和处理功能。演示系统具有自动追踪、双向切换和自动对准功能,可模拟星际激光链路维持,LEO卫星和MEO卫星间星际激光链路切换,MEO卫星对LEO卫星覆盖和数据中继等功能,为工程实现双层卫星光网络提供实验指导。In order to simulate and demonstrate the maintaining and handover of inter-orbit links of doublelayered optical satellite network accurately, a hardware-in-the-loop demonstration system of asynchronous handover optical satellite network was designed in the scale of 1：30. The system was composed of demonstration hardware platform and computer simulation platform which were connected by System-In-the- Loop （SITL） module. Hardware platform was made up of a circular rotor mounted two servo-optical communication terminals and four servo-optical communication terminals which were located on the two sides of the circular rotor. The former demonstrated the LEO satellites and the latter demonstrated the MEO satellites. The system period was 280 s, the rotational velocity of circular rotor was 1.28 （°）/s and the handover time from LEO satellites to MEO satellites was 4 s. The software environment was composed of computer virtual networks, in which flexible on board routing and processing may be performed. The demonstration system can achieve automatic tracking, bi-directional handover and automatic pointing. It can model OIOL （optical inter-orbit links） maintaining, data relaying and bi-directional handovers between LEO satellites and MEO satellites. Experiences from the demonstration system would be useful for the realization of LEO/MEO double-layered optical satellite network in engineering.

关 键 词：卫星光通信 卫星光网络 星际激光链路 半实物仿真 

分 类 号：TN929.1[电子电信—通信与信息系统]