This paper investigates switched event-triggered H∞ security control for networked systems vulnerable to aperiodic denial-of-service (ADoS) attacks. An anti-attack switched event-triggered mechanism (ATASETM) is designed by considering the impact of ADoS attacks on the systems. Based on the mechanism, the entire time interval is split into rest intervals, continuous detection intervals, residual intervals, and ADoS active-attack intervals. The closed-loop system (CLS) is represented as a three-mode switched system by merging these intervals. Subsequently, a three-piecewise Lyapunov function is constructed for fewer conservative criteria to ensure that the CLS is H∞ exponentially stable. An exact expression of the relationship between the decay rate and length of the dormant- and active-attack intervals is obtained. On the basis of the proposed criteria, a joint-design strategy is developed in terms of linear matrix inequalities for the desired trigger matrix and feedback gain. Lastly, a satellite control system and an inverted pendulum model are used to validate the ATASETM-based stability analysis and H∞ security control approaches. Numerical results demonstrate that the maximum allowable exponential decay rate decreases with increasing attack time (and vice versa), and the optimal H performance level becomes worse as the attack time or the difficulty of the event triggering increases.
|Number of pages
|IEEE Transactions on Network Science and Engineering
|Published - 2023 Jul 1
Bibliographical noteFunding Information:
This work was supported in part by the National Natural Science Foundation ofChina underGrant 61503002, in part by theKey Research andDevelopment Project of Anhui Province underGrant 202004a07020028, and in part by the National Research Foundation of Korea (NRF) funded by the Korea Government (Ministry of Science and ICT) underGrant NRF-2020R1A2C1005449).
© 2013 IEEE.
- Denial-of-service attacks
- H ∞ control
- event-triggered control
- networked control systems
- piecewise Lyapunov function
ASJC Scopus subject areas
- Control and Systems Engineering
- Computer Networks and Communications
- Computer Science Applications