Observer-based event-triggered composite anti-disturbance finite-time bounded consensus control for multi-Agent systems under switching topologies and multiple attacks

This paper investigates the finite-time bounded consensus (FTBC) problem for multi-agent systems (MASs) under hybrid attacks and external disturbances (ED), using observer-based methods and switching topologies. First, a dynamic observer is designed to estimate the upper bound of the unknown ED for compensation. Based on this disturbance compensation, a state observer is developed to mitigate false data injection attacks. Subsequently, an observer-based controller is designed to address the FTBC problem in MASs under hybrid attacks and ED. To address switching topologies induced by denial-of-service attacks, a limit-based reasoning method is introduced. Moreover, a fully distributed hybrid dynamic event-triggering mechanism featuring an adjustable lower bound is proposed to markedly lower communication load while steering clear of Zeno behavior. Ultimately, the effectiveness and superiority of the proposed method are verified by simulation examples.