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目前分布式机载测试系统主要采用PCM和以太网的体系架构,机载测试系统的时间延迟影响着数据采集的实时性、准确性和高效性。在介绍基于PCM和基于以太网分布式机载测试系统的基础上,分别给出了PCM、以太网架构下系统基于模拟量的时延测量方法;并针对同一模拟量信号分别在PCM和网络分布式机载测试系统下对其时延进行了测量,并对实验结果进行了分析。同时根据实验结果对机载测试系统的配置和应用方面提出了一些建议。
At present, the distributed airborne test system mainly adopts the architecture of PCM and Ethernet. The time delay of the airborne test system affects the real-time performance, accuracy and efficiency of data acquisition. Based on the introduction of PCM and Ethernet-based distributed on-board test system, the method of system-based delay measurement based on PCM in Ethernet and PCM is presented respectively. The same analog signal is distributed in PCM and network respectively Airborne test system to measure the delay, and the experimental results were analyzed. At the same time, some suggestions on the configuration and application of airborne test system are put forward according to the experimental results.