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arXiv 1802.07346cs.ROcs.SYeess.SPeess.SYstat.AP
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基于事件触发估计的协作机器人定位

Cooperative Robot Localization Using Event-triggered Estimation

SPAWAR Systems Center Pacific(SPAWAR太平洋系统中心);University of Colorado Boulder(科罗拉多大学博尔德分校);University of California San Diego(加州大学圣地亚哥分校)

Michael Ouimet, David Iglesias, Nisar Ahmed, Sonia Martinez

AI总结:

本文提出一种低通信开销的协作定位算法,通过事件触发机制仅在状态估计创新度高时发送测量,结合协方差交叠机制实现网络状态同步,实验验证了其在多种动态模型下的高效定位性能。

摘要:

本文描述了一种新颖的低通信开销协作定位算法,适用于移动无人机器人团队。利用基于事件的估计范式,机器人仅在状态估计创新度较高时向邻居发送测量。由于代理已知触发测量的条件,缺少的测量信息也被融合到状态估计中。机器人使用协方差交叠(CI)机制偶尔同步其对完整网络状态的局部估计。此外,启发式平衡动态确保在大直径网络中,局部误差协方差始终保持在预期范围内。线性和非线性动态/测量模型的仿真表明,事件触发方法在广泛的操作条件下实现了接近最优的状态估计性能,即使仅使用传统全数据共享所需通信开销的小部分。还检验了所提方法对丢包通信的鲁棒性以及网络拓扑与基于CI的同步需求之间的关系。

英文摘要:

This paper describes a novel communication-spare cooperative localization algorithm for a team of mobile unmanned robotic vehicles. Exploiting an event-based estimation paradigm, robots only send measurements to neighbors when the expected innovation for state estimation is high. Since agents know the event-triggering condition for measurements to be sent, the lack of a measurement is thus also informative and fused into state estimates. The robots use a Covariance Intersection (CI) mechanism to occasionally synchronize their local estimates of the full network state. In addition, heuristic balancing dynamics on the robots' CI-triggering thresholds ensure that, in large diameter networks, the local error covariances remains below desired bounds across the network. Simulations on both linear and nonlinear dynamics/measurement models show that the event-triggering approach achieves nearly optimal state estimation performance in a wide range of operating conditions, even when using only a fraction of the communication cost required by conventional full data sharing. The robustness of the proposed approach to lossy communications, as well as the relationship between network topology and CI-based synchronization requirements, are also examined.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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