Security control based on variable-step predictive approach for networked control system with denial-of-service attacks

This paper investigates the variable-step predictive control problem for networked control system (NCS) with denial-of-service (DoS) attacks and model uncertainty. An event-based variable-step predictive scheme determined by accumulated error is firstly formulated to compensate the impact of DoS attacks. Based on the presence of DoS attacks and predictive control signals, NCS with DoS attacks is divided into three different operation modes and is described by switching system. With the above prediction scheme and system model, sufficient conditions are derived for ensuring the stability of the underlying system. Finally, an example is given to verify the validity of the theoretical results.