飞行仿真系统网络传输与同步技术

Network Transmission and Synchronization Technology of Flight Simulation System

摘要:

网络通信是分布环境下飞行仿真系统需要解决的关键技术,包括网络传输量和时钟同步等。网络传输量方面,采用 DR模型降低了网络数据更新频率,减少了数据通信量,并采用数据封包、解包的方法降低了网络频繁调用带来的时间损耗；时钟同步方面,采用了硬件同步电路和软件高性能时钟相结合的时钟同步方案,确保了飞行仿真系统时间推进的严格同步。在此基础上,构建了基于适配器模式的、支持多协议的通信引擎网络中间件,将顶层应用和底层通信进行有效隔离,降低了应用层开发量,加快了系统集成效率,在多型飞机模拟器中得到了应用。

Abstract:

Network communication is a key technology problem of flight simulation system in distributed environment, in.cluding network transmission amount and clock synchronization etc. In terms of network transmission amount, DR modelwas adopted to reduce the update frequency of network data and interactive data volume, data package was adopted to re.duce the time wastage of frequent network calls. In terms of clock synchronization, a scheme of combining hardware syn.chronization circuit and software high performance clock was put to ensure strict synchronization of time advance in flightsimulation system. Based on the method of reducing network transmission amount and clock synchronization, network com.munication middleware based on adapter pattern was designed, which supported multi-protocols. The middlew are isola.teed the top-level applications and bottom-level communications, reduced application layer development quantity and ac.celerated system integration efficiency. The middleware was applied in some aircraft simulators.