Event-triggered control for stochastic networked control systems against Denial-of-Service attacks

Recently, the security issues in networked control systems have become a major challenge, since networked control systems (NCSs) are vulnerable to malicious attacks. In this paper, a new event-triggered mechanism (ETM) is proposed, under which data packets could be actively dropped within consecutive steps, saving more communication resource than the existing ETM. Moreover, the effect of Denial-of-Service (DoS) attacks obeying Bernoulli distribution is considered and analysed. Furthermore, the corresponding estimation error covariance of the state is derived and the performance of system is analysed under the ETM both in the absence and presence of DoS attacks. Finally, the effectiveness of the proposed ETM is demonstrated by Monte Carlo simulation experiments and the feasibility of theoretical results is validated by numerical examples.