Abstract: This paper introduces fundamental and excellencies of shared memory network and reveals its limitations of serial transmission and so on used in the helicopter engineering simulator. To solve it, the paper puts forward a new parallel RAM network(PRNet) fit for the communication mode of message passing. The method is that two parallel RAM network interface cards(PRNIC) based on four-port fast SRAM are fixed in the central node of the simulator. In this way, point-to-point parallel communication among the central node and the subsystems may be implemented so as to enhance congregate bandwidth of exchanging datum among them to six times as that of shared memory network and message delay may be utmost diminished so as to strengthen the performance of the simulator.

Key words: Engineering simulator, Message passing, Shared memory network, Four-port fast SRAM, Parallel RAM network

摘要： 介绍了共享存储网络的原理和优点，揭示了其在直升机工程模拟器应用中暴露出的串行传输等缺陷。为了解决应用中的问题，提出了一种适合于消息传递通信模式的并行存储网络。方法是在模拟器的中心节点中安装2块基于4端口快速静态存储器的并行存储网卡，这样可以实现中心节点和分系统的点对点并行通信，从而提高它们之间交换数据的聚集带宽到共享存储网络的6倍，最大限度地减小消息延时，从而增强模拟器的性能。

关键词: 工程模拟器, 消息传递, 共享存储网络, 4端口快速静态存储器, 并行存储网络