提出自组织备份层与分布式共识结合的主动-被动策略,有效检测并缓解机器人集群中的间歇性故障。
Proactive-reactive detection and mitigation of intermittent faults in robot swarms
- 利用多层网络中的自组织备份路径提前构建冗余通信链路。
- 通过单次似然比检验实现早期故障检测,准确率高且误报率低。
- 适用于需要高可靠性的群体协同任务,如编队控制场景。
间歇性故障是偶发出现又消失的瞬时错误,严重威胁机器人集群的可靠性与协调性。现有研究多聚焦于永久性故障,因间歇性故障在典型自组织动态网络中难以检测——其拓扑结构瞬变且不可预测。然而,近期提出的自组织神经系统(SoNS)首次使机器人集群能够构建持久网络结构,为检测间歇性故障提供了可能。本文提出一种主动-被动协同策略:主动方面,机器人在故障发生前自组织动态备份路径,适应主网络拓扑和相对位置变化;被动方面,通过单次似然比检验比较多层网络中不同路径接收的信息,实现早期故障识别;一旦检测到故障,通信将临时自组织重路由,直至故障消失。在编队控制中模拟位置数据故障的典型场景下验证表明,该方法可有效防止间歇性故障干扰收敛至目标构型,具备高检测精度与低误报率。
原文摘要 · Abstract (English)
Intermittent faults are transient errors that sporadically appear and disappear. Although intermittent faults pose substantial challenges to reliability and coordination, existing studies of fault tolerance in robot swarms focus instead on permanent faults. One reason for this is that intermittent faults are prohibitively difficult to detect in the fully self-organized ad-hoc networks typical of robot swarms, as their network topologies are transient and often unpredictable. However, in the recently introduced self-organizing nervous systems (SoNS) approach, robot swarms are able to self-organize persistent network structures for the first time, easing the problem of detecting intermittent faults. To address intermittent faults in robot swarms that have persistent networks, we propose a novel proactive-reactive strategy to detection and mitigation, based on self-organized backup layers and distributed consensus in a multiplex network. Proactively, the robots self-organize dynamic backup paths before faults occur, adapting to changes in the primary network topology and the robots' relative positions. Reactively, robots use one-shot likelihood ratio tests to compare information received along different paths in the multiplex network, enabling early fault detection. Upon detection, communication is temporarily rerouted in a self-organized way, until the detected fault resolves. We validate the approach in representative scenarios of faulty positional data occurring during formation control, demonstrating that intermittent faults are prevented from disrupting convergence to desired formations, with high fault detection accuracy and low rates of false positives.
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