一种适用无人机集群的多段补偿时间同步算法  

A Multi-Stage Compensation Bidirectional Time Synchronization Algorithm for UAV Cluster

作　　者：张然 刘春玲[1] 程珺炜 丁元明[1] ZHANG Ran;LIU Chun-ling;CHENG Jun-wei;DING Yuan-ming(College of Information Engineering,Dalian University,Dalian Liaoning 116622,China)

机构地区：[1]大连大学信息工程学院,辽宁大连116622

出　　处：《计算机仿真》2021年第7期327-330,474,共5页Computer Simulation

基　　金：装备发展部领域基金一般项目(61403110308);辽宁省自然基金指导计划项目(2019-ZD-0311);辽宁省博士启动基金项目(20170520371)。

摘　　要：随着人工智能、传感器以及通信技术的快速发展,无人机集群已经逐渐成为现代军事战争中一个不可或缺的作战因素。为了适应无人机集群网络拓扑内的高动态变化,提高组网节点的时间同步精度,提出一种适用于无人机集群的多段补偿双向时间同步算法。算法基于节点间的双向时间信息交互,同时考虑了时钟偏移率与偏移量对同步的影响,并通过均值滤波和指数平滑法来校正时钟偏移。仿真结果表明,与传统的双向同步算法相比,提出的时间同步算法同步精度更高、同步保持更长,更适用于复杂多变的无人机集群网络的时间同步。With the rapid development of artificial intelligence, sensors and communication technology, Unmanned Aerial Vehicle(UAV) cluster has gradually become an indispensable operational factor in modern military warfare. In order to adapt to the high dynamic changes in UAV cluster network topology and improve the time synchronization accuracy of network nodes, a multi-stage compensation bidirectional time synchronization algorithm for UAV cluster is proposed. This algorithm is based on bidirectional time information interaction between nodes and takes the influence of clock offset rate and offset amount on synchronization into consideration. Then clock offset is corrected by means of mean filter and exponential smoothing method. The simulation results show that, compared with the traditional bidirectional synchronization algorithm, the proposed time synchronization algorithm has higher synchronization accuracy and longer synchronization holding, and is more suitable for the time synchronization of complex and changeable UAV cluster network.

关 键 词：无人机集群 时间同步 双向同步 指数平滑法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]