Research on Co-Design of Security Control and Communication for Cyber Physical System under Cyber-Attacks

摘要

For actuator failures and cyber-attacks, this paper investigates the co-design problem of security control and communication quality for cyber physical system (CPS). Firstly, under the discrete event-triggered communication scheme (DETCS), we propose a system framework with fault-tolerant/attack-tolerant control, and sets the trigger condition, actuator failures and cyber-attacks in one to establish a closed-loop CPS model. Secondly, synthesizing the appropriate Lyapunov-Krasovskii functions, the time-delay system theory and the affine Bessel-Legendre inequality, the $a$ -stable constrained sufficient condition with fault-tolerance/attack tolerance for CPS is deduced. Then a less conservative design method of robust fault-tolerant/attack-tolerant controller gain matrix and event trigger matrix is given. In this way, we achieve the co-design goal between security control and communication. Finally, the simulation experiments are conducted to illustrate the effectiveness and feasibility of the proposed method.