Distributed event-triggered H∞ filtering over sensor networks with communication delays
Distributed event-triggered H∞ filtering over sensor networks with communication delays
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DOI：
10.1016/j.ins.2014.08.047
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
Xiaohua Ge;Qing-Long Han
中科院分区：
文献类型：
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作者：
Xiaohua Ge;Qing-Long Han
研究了具有通信时延的传感器网络的分布式事件触发H∞滤波问题。首先，提出了一种新的分布式事件触发通信方案，以确定每个传感器的当前采样数据是否应该被广播和传输的滤波器设计。每个传感器节点能够作出自己的决定，广播和传输当前的采样数据，只有当其本地测量输出误差超过指定的阈值。其次，在分布式事件触发通信方案下，所得到的包含通信延迟信息的滤波误差系统被转化为具有多个延迟的系统。给出了期望的分布式事件触发H∞滤波器存在的充分条件，使得滤波误差系统渐近稳定且具有给定的加权平均H∞性能。对通信资源利用率和加权平均H∞性能进行了权衡分析。第三，提出了一种同时确定滤波器参数和阈值参数的协同设计算法。最后，通过一个基准算例验证了所得理论结果的有效性.
This paper is concerned with distributed event-triggered H∞ filtering over sensor networks with communication delays. Firstly, a new distributed event-triggered communication scheme is proposed to determine whether or not each sensor’s current sampled-data should be broadcast and transmitted for filter design. Each sensor node is capable to make its own decision to broadcast and to transmit current sampled-data only when its local measurement output error exceeds a specified threshold. Secondly, under the distributed event-triggered communication scheme, the resultant filtering error system, which includes information of communication delays, is transformed into a system with multiple delays. Sufficient conditions on the existence of desired distributed event-triggered H∞ filters are derived such that the resultant filtering error system is asymptotically stable with prescribed weighting average H∞ performance. The trade-off analysis between communication resource utilization and weighting average H∞ performance is carried out. Thirdly, a co-design algorithm for simultaneously determining the filter parameters and the threshold parameters is developed. Finally, a benchmark example is given to show the effectiveness of the obtained theoretical results.