面向节能的无线多传感器H_∞融合估计

Energy-efficient H_∞ fusion estimation for wireless sensor networks

研究了一类WSNs环境下具有能量约束的无线多传感器系统H∞融合估计问题.通过提出一种新的节能传输策略,即降低节点到融合中心的信息发送频率,将融合估计系统建模成一类离散时间周期系统.基于融合估计误差周期系统,采用李雅普诺夫稳定性理论和线性矩阵不等式技术,导出了能量受限情况下系统渐近稳定且具有给定H∞性能指标的充分条件,并给出了H∞融合估计器的设计方法.最后,通过一个仿真算例验证所提出设计方法的有效性.

This paper investigates the H∞ fusion estimation problem for wireless sensor networks （WSNs） with energy constraint.An energy-efficient transmission strategy is proposed by reducing the measurements transmission rate from the sensors to the fusion center,and the fusion estimation system is described as a linear discrete-time periodic system model.Then,by using the Lyapunov stability theory and Linear matrix inequality （LMI） technique,a sufficient condition is presented for the estimation system to be asymptotically stable and ensure a prescribed H∞ performance.Moreover,a design method for the H∞ fusion estimator is also presented.Finally,a numerical example is given to demonstrate the effectiveness of the proposed approach.