信頼を活用した悪意ある攻撃下での有向グラフ上の高速分散最適化
Fast Distributed Optimization over Directed Graphs under Malicious Attacks using Trust
悪意あるエージェントが存在する有向通信グラフ上で、エージェント間の信頼値と勾配追跡を用いて幾何収束を達成する分散最適化アルゴリズムRP3を提案した。
著者: Arif Kerem Dayı, Orhan Eren Akgün, Stephanie Gil, Michal Yemini, Angelia Nedić
分類: eess.SY, cs.MA, cs.RO, cs.SY, math.OC
原文アブストラクト
In this work, we introduce the Resilient Projected Push-Pull (RP3) algorithm designed for distributed optimization in multi-agent cyber-physical systems with directed communication graphs and the presence of malicious agents. Our algorithm leverages stochastic inter-agent trust values and gradient tracking to achieve geometric convergence rates in expectation even in adversarial environments. We introduce growing constraint sets to limit the impact of the malicious agents without compromising the geometric convergence rate of the algorithm. We prove that RP3 converges to the nominal optimal solution almost surely and in the $r$-th mean for any $r\geq 1$, provided the step sizes are sufficiently small and the constraint sets are appropriately chosen. We validate our approach with numerical studies on average consensus and multi-robot target tracking problems, demonstrating that RP3 effectively mitigates the impact of malicious agents and achieves the desired geometric convergence.
