关于PCM网络迁移机载仪表系统的研究

Research on Airborne Instrumentation Systems from PCM to Network Migration

目前在世界各地大多数利用基于PCM的机载测试系统操作飞行试验程序。大多数仪器工程师是基于PCM数据采集系统,当谈到网络实现与采用综合网络增强遥测i NET感到不适应。为了让这些工程师们接受这种新技术,从PCM迁移到网络拓扑结构必须以渐进的方式进行,提供投资保本的同时引入新的系统概念,提高目前的仪器系统。论文介绍了硬件组件,使仪器工程师迁移基于他们现有的PCM仪表系统到网络系统。对这些组件进行了讨论,以说明他们如何提供一个基于网络的系统控制的迁移路径。这些组件包括时间分布、网关、网络数据选择器、网络交换机、发射机、收发器和记录器。

The majority of currently operating flight test programs around the world utilize PCM based airborne instrumenta-tion systems. Most instrumentation engineers are with PCM-based data acquisition systems,and feel uncomfortable when talkingabout network implementations and the adoption of i NET. In order for these engineers to embrace this new technology,migratingfrom a PCM to network topology must be done in an evolutionary manner that provides for the preservation of capital investmentwhile introducing new system concepts that enhance current instrumentation systems. This paper describes hardware componentsthat enable instrumentation engineers to migrate their existing PCM-based instrumentation system to a network-based system. Sever-al of these components are discussed to illustrate how they provide a controlled migration path to a network-based system. Thesecomponents include time distribution,gateways,network data selectors,network switches,transmitters,transceivers and recorders.