A switching approach to event-triggered control systems under denial-of-service attacks
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Universidade Federal de Minas Gerais
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This paper addresses the resilient event-triggered control (ETC) of networked control systems under denial-of-service (DoS) attacks. The scenario in which the presence of DoS attacks limits the data rate is studied considering a deterministic DoS attack model that constrains the frequency and duration of the DoS attack sequence in an average sense. Based on a switching approach, constructive sufficient conditions are proposed to design the resilient ETC scheme in both emulation and co-design approaches. The conditions establish a limitation to the average DoS frequency and duration such that the exponential stability of the closed-loop equilibrium and the Zeno-freeness is guaranteed even in the presence of DoS attacks. Moreover, optimization problems subject to LMI constraints are formulated to solve the emulation and co-design problems by enlarging the resilience to the considered class of DoS attacks while the number of transmissions is reduced. This establishes a clear trade-off between resilience and resource awareness in networked control systems under DoS attacks. The effectiveness of the proposed conditions is illustrated in two numerical examples.
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Event-based controlControl over networksCyber–physical systemsSwitching stability and control, With the development of communication and computing technologies, the use of communication networks to interconnect the elements of the control loop such as actuators, sensors, plant, and controllers, has become very common. This scenario motivates the research and application of networked control system (NCS) tools, which are meant to deal with the bottlenecks related to the presence of communication networks in control systems.
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https://www.sciencedirect.com/science/article/pii/S1751570X23000547