一种基于分布式最小均方差序贯估计的气体泄漏源定位算法

发布时间：2018-08-20 15:23

【摘要】：基于无线传感网络的气体泄漏源定位在环境监测、安全防护和污染控制等多个领域具有重要意义。提出一种基于分布式最小均方差(D-MMSE)序贯估计的气体泄漏源定位算法。其通过构建一个包含节点之间信息增益与网络能量消耗两方面参数的信息融合目标函数,并对目标函数寻优实现路由节点的调度与选择。所选节点在其测量值和前节点估计值并通过与邻居节点信息交互的基础上完成气体泄漏源位置参数估计量及其方差的更新与传递。为了降低网络能耗,邻居节点集的选择半径随估计量方差做动态调整。仿真分析表明所提算法对比单节点序贯估计定位算法在一定的能耗条件下可获得较高的定位精度和速度。
[Abstract]:The location of gas leakage source based on wireless sensor network is of great significance in many fields, such as environmental monitoring, safety protection and pollution control. A gas leakage source location algorithm based on distributed minimum mean square error (D-MMSE) sequential estimation is proposed. By constructing an information fusion objective function which includes the parameters of information gain and network energy consumption between nodes, and optimizing the objective function, the routing node can be scheduled and selected. The selected nodes complete the update and transmission of the location parameters and variance of the gas leakage source on the basis of the measured value and the estimate value of the former node and the information interaction with the neighbor node. In order to reduce the network energy consumption, the selection radius of the neighbor node set is dynamically adjusted with the variance of the estimator. Simulation results show that compared with single node sequential estimation algorithm, the proposed algorithm can achieve higher positioning accuracy and speed under certain energy consumption conditions.
【作者单位】：天津商业大学信息工程学院;天津大学电气与自动化工程学院;
【基金】：国家自然科学基金项目(61271321,60875053,60802051) 天津市高校科技发展基金项目(20130710)
【分类号】：TP212.9;TN929.5

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