Secure Consensus of MASs Subject to DoS Attacks: A New Dynamic-Memory-Weight-Dependent Security Control Protocol
针对非线性领航者-跟随者多智能体系统在拒绝服务攻击下的安全一致性问题，提出了一种改进的基于记忆的自适应事件触发机制和动态记忆权重依赖安全控制协议，以减少数据冗余、节省网络资源并缓解攻击影响。
This article investigates the secure consensus problem for nonlinear leader-following multiagent systems (MASs) under denial-of-service (DoS) attacks. First, an improved memory-based adaptive event-triggered mechanism (MAETM) is proposed to reduce data redundancy and save network resources. Unlike previous MAETMs, in order to effectively prevent excessively long data triggering periods or overly frequent triggering, the proposed MAETM introduces an upper limit and a lower limit to limit the threshold range. In this way, the communication resources can be effectively saved. In addition, considering the impact of DoS attacks, a new dynamic-memory-weight-dependent (DMW-dependent) security control protocol is proposed. Unlike control methods that use fixed weights, the protocol dynamically adjusts the weights of historically released packets according to DoS attacks, thus more fully utilizing the information of successfully transmitted packets to mitigate the impact of DoS attacks. Subsequently, sufficient conditions for the secure consensus of MASs are derived by constructing Lyapunov–Krasovskii functionals (LKFs) and using the law of large numbers and the Lagrange mean value theorem. Finally, two numerical simulations are provided to verify the effectiveness of the proposed MAETM and DMW-dependent security control protocol.