摘要
考虑到在无线传感器网络中,新节点的加入或老节点的死亡均会导致拓扑呈动态变化,该文研究一种完全分布式二阶一致性时间同步(Second-Order Consensus Time Synchronization,SOCTS)算法。将节点的时钟特性建模成二阶状态方程,按照伪同步周期广播节点的本地虚拟时间,根据邻居节点的本地虚拟时间的不一致来构造同步控制输入;通过坐标变换将网络的一致性时间同步问题转化为变换系统的稳定性问题,理论分析了SOCTS算法的收敛性和收敛条件,并研究了影响SOCTS算法收敛速度的因素。通过数值仿真实验验证了所提方法的有效性。
Since in wireless sensor networks, the joint of new nodes or the death of old nodes lead to a dynamic topology, this paper studies one completely distributed Second-Order Consensus Time Synchronization （SOCTS） algorithm. The clock feature of each node is modeled into a second order state equation, and the local virtual time is broadcasted according to the pseudo synchronous cycle, Moreover, the synchronization control input is constructed according to the disagreement on local virtual time among neighboring nodes. By virtue of the matrix transformation, the network time synchronization issue is turned into the stability issue of some transformed system, and the convergence and convergence condition for the SOCTS algorithm are analyzed theoretically. Moreover, the factors that influence the convergence rate of the SOCTS algorithm are investigated. Finally, the effectiveness of the proposed method is verified by numerical simulations.
出处
《电子与信息学报》
EI
CSCD
北大核心
2017年第1期51-57,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(51274011
51404008
61472003)
安徽省科技攻关计划(1501021027)~~
关键词
无线传感器网络
时间同步
一致性
收敛性
Wireless sensor networks
Time synchronization
Consensus
Convergence
作者简介
通信作者：黄友锐：男，1971年生，教授，博士生导师，主要研究方向是矿山物联网和智能信息处理．hyr628@163．com
陈珍萍：女，1981年生，副教授，主要研究方向为物联网技术．
李德权：男，1973年生，教授，从事多个体系统协调控制、分布式优化理论与方法等研究．
