Stability analysis for networked control systems under denial-of-service attacks

With the large-scale application of modern information technology in networked control systems (NCSs), the security of networked control systems has drawn more and more attention in recent years. However, how far the NCSs can be affected by adversaries are few considered. In this paper, we consider a stability problem for NCSs under denial-of-service (DoS) attacks in which control and measurement packets are transmitted over the communication networks. We model the NCSs under DoS attacks as a singular system, where the effect of the DOS attack is described as a time-varying delay. By a Wirtinger-based integral inequality, a less conservative attack-based delay-dependent criterion for NCSs´ stability is obtained in term of linear matrix inequalities (LMIs). Finally, examples are given to illustrate the effectiveness of our methods.