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为了提高航天航空网络传输性能,提出一种通用的FC-AE-1553网络传输效率计算方法并研制高性能FC-AE-1553节点卡.首先,对FC-AE-1553网络的消息传输过程进行详细分析,分析信息类型,给出传输帧的格式建议,通过分析FC-AE-1553协议中各类消息传输的时间参数,结合FC标准中对通信时间的要求,提出FC-AE-1553网络交换中各种消息类型的通信时间计算公式.然后,针对无差错传输和有差错传输两种情况,给出了网络传输效率的计算方法.最后,通过仿真分析数据帧净荷长度、节点处理时间、交换中序列数量、传输误码率、丢包率等参数对FC-AE-1553网络传输效率的影响,给出了网络优化设计的建议.依托某航天工程任务,研制了基于XC5VFX100T和MPC8536E的FC-AE-1553节点卡.实验结果表明:丢包对传输效率的影响可忽略;数据帧净荷为2048 B,数据帧数量为16时,传输效率可达到77.2%.
In order to improve the transmission performance of aeronautic and aeronautic networks, a general calculation method of FC-AE-1553 network transmission efficiency and a high performance FC-AE-1553 node card are proposed. Firstly, the message transmission process of FC-AE-1553 network is described in detail Analyze and analyze the information type, and give the format suggestion of transmission frame. By analyzing the time parameters of all kinds of message transmission in FC-AE-1553 protocol and combining with the requirement of communication time in FC standard, The communication time calculation formula of various message types is given.Thirdly, the calculation method of network transmission efficiency is given for both error-free transmission and error transmission.Finally, the simulation data frame payload length, node processing time, exchange The effect of FC-AE-1553 network transmission parameters on the network transmission efficiency such as the number of sequence, transmission bit error rate, packet loss rate and other parameters, and gives the recommendations of network optimization design.Relying on a space project tasks, developed based on XC5VFX100T and MPC8536E FC- AE-1553 node card.The experimental results show that the impact of packet loss on transmission efficiency is negligible, the data frame payload is 2048 B, and the data frame number is 16, the transmission efficiency can reach 77.2%.