Observer-Based Consensus Security Control for Multi-Agent Systems Under FDI Attacks

To solve the consensus security control issue of fake data injection (FDI) attacks on the communication link of discrete-time multi-agent systems (MASs), a consensus control protocol based on discrete state observers is proposed. First, a distributed state observer is built based on the relative outputs of the neighboring agents in order to estimate the leader's state and tracking error. A discrete consensus control protocol is additionally created to allow followers to monitor the leader's state trajectories despite FDI attacks and to confirm the system's stability. The effectiveness of the proposed control strategy is then verified using numerical simulation and simulation using a model of a smart grid system.