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    This study addresses H∞ output feedback control for event-triggered networked systems facing cyber attacks. A new dynamic event-triggered scheme ensures system stability and performance despite deception and DoS attacks.

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    Area of Science:

    • Control Systems Engineering
    • Networked Systems Security
    • Cyber-Physical Systems

    Background:

    • Networked systems are vulnerable to cyber attacks, impacting control performance.
    • Event-triggered control reduces data transmission but needs robust security.
    • Existing methods often lack comprehensive attack consideration.

    Purpose of the Study:

    • To design an H∞ output feedback controller for event-triggered networked systems under multiple cyber attacks.
    • To develop a dynamic event-triggered scheme (DETS) mitigating unnecessary data transmission.
    • To ensure asymptotic mean-square stability (AMSS) and H∞ performance.

    Main Methods:

    • Utilizing two dynamic event-triggered generators at sensor and observer sides.
    • Modeling deception attacks on the sensor-to-observer (STO) channel.
    • Modeling Denial-of-Service (DoS) attacks on the observer-to-controller (OTC) channel.
    • Deriving a sufficient condition for closed-loop system stability and performance.

    Main Results:

    • A novel output feedback controller design method is presented.
    • The proposed dynamic event-triggered scheme effectively reduces data transmission.
    • The derived condition guarantees AMSS with prescribed H∞ performance under combined attacks.
    • Controller design method is validated through a simulation example.

    Conclusions:

    • The proposed method effectively addresses H∞ output feedback control for event-triggered networked systems under cyber attacks.
    • DETS combined with robust control ensures system stability and performance.
    • The approach offers a practical solution for secure networked control systems.