小卫星模拟系统中多路串行通信系统设计  

Design of multi-serial communication for micro-satellite simulation system

作　　者：张文凯[1,2] 关桂霞[1] 赵海盟[2] 王明志[2] 吴太夏[3] 晏磊[2] 

机构地区：[1]首都师范大学信息工程学院,北京100048 [2]空间信息集成与3S工程应用北京市重点实验室(北京大学),北京100871 [3]中国科学院遥感与数字地球研究所,北京100094

出　　处：《计算机应用》2013年第12期3477-3481,共5页journal of Computer Applications

基　　金：国家科技支撑计划项目(2011BAH23B01);国家自然科学基金资助项目(11174017);北京市自然科学基金资助项目(1093016)

摘　　要：针对小卫星模拟系统中星载计算机与相机载荷通信及控制问题,研发多路串行通信控制系统。系统设计采用Host-Target模式,在星载计算机(Host)端软件实现多路通信管理子系统,设计基于现场可编程门阵列(FPGA)的相机载荷分控单元(Target);同时,在RS-232通信协议基础上提出一种多路串行通信协议,完成星载计算机与相机载荷分控单元的通信控制。用SignalTapⅡ逻辑分析工具捕捉FPGA内部实时信号对系统性能进行验证,结果表明该系统可对单一或者多路相机载荷进行灵活控制与管理。A communication system with several serial ports was developed to realize the communication between On- Board Computer （OBC） and cameras in micro-satellite simulation system. The system was designed in Host-Target model. The Host sever managed the multiplex communications between the host and its clients. It also sent out trigger signal to control five cameras through a Field Programmable Gate Array （FPGA） chipset. In addition, a muhiplex serial communication protocol based on RS-232 protocol was proposed to complete the communication. The logic analytical tool SignalTap 1/ was used to capture the real-time signal of FPGA to verify the performance of the system. The results indicate that the system can control and manage a single camera or multiple cameras flexibly.

关 键 词：小卫星模拟系统 相机载荷 RS-232通信协议 现场可编程门阵列 多路控制 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]