基于AUTBUS总线的机载无线柔性分布式测试系统数据同步采集技术  

Synchronization data collection technique for airborne wireless flexible distributed testing system based on AUTBUS

作　　者：李铁林[1] Li Tielin(Chinese Flight Test Establishment,Xi′an 710089,China)

机构地区：[1]中国飞行试验研究院,西安710089

出　　处：《电子测量技术》2024年第11期176-181,共6页Electronic Measurement Technology

摘　　要：本研究致力于机载无线柔性分布式测试系统的研制,以解决在飞行试验中测试系统占地空间大、线缆使用量大、走线复杂、测试通道数量多等问题。分布式系统的节点分布在不同的位置,其内部时钟可能因多种因素而出现不同步的情况,从而影响数据采集的精度。通过灵活的时隙资源分配机制实现AUTBUS总线的动态调整,确保系统通信的高效稳定。采用1PPS、TOD及AUTBUS总线对表算法,系统能够有效地实现全网节点设备的时间同步,确保各个节点在相同的时间基准上进行协同操作。测试数据同步采集基于外部触发的模数转换模块,在全网协同事件的时刻实现各节点数据的同步采集。测试结果表明系统的同步数据采集精度最低为822.5 ns,满足飞行试验中机载测试的数据采集需求。This study focuses on the development of an airborne wireless flexible distributed testing system to address the challenges of large space occupation,high cable usage,complex wiring,and numerous testing channels in flight experiments.The distributed system consists of nodes distributed at different locations,and the internal clocks of these nodes may become unsynchronized due to various factors,which can affect the accuracy of data acquisition.By employing a flexible time slot allocation mechanism,the AUTBUS bus can be dynamically adjusted to ensure efficient and stable communication within the system.The synchronization of all network node devices is achieved through the utilization of 1PPS,TOD,and AUTBUS bus-based timing algorithms,ensuring synchronized operations among all nodes based on the same time reference.The synchronous data acquisition of the testing data is accomplished through an externally triggered analog-to-digital conversion module,enabling the synchronized data collection of all nodes during coordinated events across the network.The test results demonstrate that the system achieves a synchronization data acquisition accuracy of 822.5 ns,meeting the data acquisition requirements for airborne testing in flight experiments.

关 键 词：机载测试 无线柔性测试系统 AUTBUS总线 时间同步算法 数据同步采集 

分 类 号：TN915.41[电子电信—通信与信息系统]