论文标题
通过离散时间共识网络中的接地和对策分析攻击
Analysis of Attack via Grounding and Countermeasures in Discrete-Time Consensus Networks
论文作者
论文摘要
我们通过接地研究离散时间共识问题的破坏。宽松地说，如果一个代理的状态不再响应其他代理的输入和/或改变其动态，就会实现接地网络。然后，代理人成为领导者或所谓的顽固代理人。由于恶意攻击，代理商的破坏可能是由内部故障，安全协议或外部引起的。在本文中，我们研究了接地如何影响扩展器图家族的特征，这些家族通常表现出良好的缩放特性，而网络大小的增加。结果表明，由于接地导致网络的性能和可扩展性降低，即使到失去共识的程度，网络的代数连接性和特征性将减小。然后，我们以被动和主动的方式提出对此类中断的对策。我们的发现得到了论文中给出的数值模拟的支持。
We investigate the disruption of discrete-time consensus problems via grounding. Loosely speaking, grounding a network occurs if the state of one agent no longer responds to inputs from other agents and/or changes its dynamics. Then, the agent becomes a leader or a so called stubborn agent. The disruption of the agent can be caused by internal faults, safety protocols or externally due to a malicious attack. In this paper we investigate how the grounding affects the eigenratio of expander graph families that usually exhibit good scaling properties with increasing network size. It is shown that the algebraic connectivity and eigenratio of the network will decrease due to the grounding causing the performance and scalability of the network to deteriorate, even to the point of losing consensusability. We then present countermeasures to such interruptions both in a passive and active manner. Our findings are supported by numerical simulations given within the paper.
