An Indirect-Direct event-triggered mechanism for networked control system against DoS attacks

摘要

H_∞ control problem of linear discrete time system under DoS attacks is concerned. To cope with the failure of primary communication channel, a redundant transmission line is configured in feedback channel. An Indirect-Direct event-triggered mechanism (IDET) is first proposed to implement the function that redundant channel starts up automatically for measurements transmission when primary channel has been shut down by DoS attacks. Then, Lyapunov stability method and LMI technique are adopted to analysis system stability and H_∞ disturbance attenuation performance. And feedback control gain and trigger parameters of IDET are designed simultaneously. Finally, numerical simulations are given to illustrated the effectiveness of our proposed IDET under three classical types of DoS attacks.