A Gate-corrected Event-triggered Mechanism and Its Application to the Optic-electric Sensor Network
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摘要: 本文针对一类通信资源有限的集中式目标状态估计问题进行了研究, 提出一种带波门修正的事件触发机制.当事件触发条件不满足时, 相应探测器按通信系统设计带宽发送完整量测新息至融合中心.当事件触发条件满足时, 相应探测器将量化量测新息发送给融合中心.减少数据传输量, 减轻通信系统的负担.随后推导机制下的融合中心最小均方误差状态估计算法并对其性能进行了理论分析.最后给出一个光电探测网的应用算例, 表明了其在工程应用中的有效性及可行性.
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关键词:
- 波门修正 /
- 事件触发机制 /
- 最小均方误差估计算法 /
- 光电探测网
Abstract: This article focuses on the problem of the centralized target state estimation with constrained communication resources. This article proposes an novel gate-corrected event-triggered mechanism. When the event-triggered condition is satisfied, the corresponding sensor only sends the quantization of the innovation to the fusion center. It reduces the data transmission amount and eases the burden of the communication system. When the event-triggered condition is not satisfied, the sensor sends the whole innovation to the fusion center. This article also derives the minimum mean square error estimation algorithm with the proposed mechanism. The algorithm's performance is also analyzed in this article. At last, its application to an optic-electric sensor network verifies the efficiency and feasibility of the proposed mechanism.-
Key words:
- Gate-corrected /
- event-triggered mechanism /
- the minimum mean square error state estimation algorithm /
- the optic-electric sensor network
1) 本文责任编委 曹向辉 -
图 4 各门限因子下的事件触发机制触发情况
Fig. 4 The triggering condition of the variance-triggered innovation quantization with different $\delta$
图 8 事件触发新息量化机制下光电探测网目标跟踪示意图
Fig. 8 The diagram of the target tracking of the optic-electric sensor network with the variance-triggered innovation quantization mechanism
图 9 航路A各通信机制下融合中心对目标位置及速度估计精度
Fig. 9 The $\text{RMSE}_{\text{pos}}, \text{RMSE}_{\text{vel}}$ of the fusion center with three communication mechanisms of lane A
图 10 航路B各通信机制下融合中心对目标位置及速度估计精度
Fig. 10 The $\text{RMSE}_{\text{pos}}, \text{RMSE}_{\text{vel}}$ of the fusion center with three communication mechanisms of lane B
图 11 航路A各通信机制下光电探测网与融合中心间通信量
Fig. 11 The communication cost between the optic-electric sensor network and the fusion center with three communication mechanisms of lane A
图 12 航路B各通信机制下光电探测网与融合中心间通信量
Fig. 12 The communication cost between the optic-electric sensor network and the fusion center with three communication mechanisms of lane B
图 13 航路A各通信机制下$P_{k|k-1}$对角元素变化情况
Fig. 13 The variation of diagonal elements with three communication mechanisms of lane A
图 14 航路B各通信机制下$P_{k|k-1}$对角元素变化情况
Fig. 14 The variation of diagonal elements of $P_{k|k-1}$ with three communication mechanisms of lane B
表 1 各通信机制性能比较
Table 1 The comparison of each communication mechanism's performance
通信机制 KF SOI-KF ET-SOI-KF $\delta = 2.9$ $\delta = 3.5$ $\delta = 4.7$ 平均通信量 8 1 7.72 4.36 1 精度 0.806 1.288 0.808 0.978 1.288 
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