虚假数据注入攻击下信息物理系统动态输出反馈控制

Dynamic output feedback control of cyber-physical systems under false data injection attacks

针对受到虚假数据注入攻击的信息物理系统安全控制问题,将虚假数据注入攻击作为一类特殊的外部扰动,提出了一种具有攻击防御能力的H_(∞)动态输出反馈控制策略.首先,考虑虚假数据注入攻击对测量通道与随机时延对通信网络的影响,建立了一类具有网络攻击、随机时延和外部扰动等多种约束的闭环系统模型;其次,借助李雅普诺夫稳定性理论推导出攻击下闭环系统渐近稳定的充分条件,并基于线性矩阵不等式技术给出了H_(∞)动态输出反馈控制器的设计方法;最后通过一个仿真算例验证了所述方法的可行性和有效性.

In this paper,an H-infinity dynamic output feedback control strategy with attack defense ability is investigated to deal with the problem of security control of cyber-physical system(CPS)under false data injection(FDI)attacks,which is taken as a special kind of external disturbance.Firstly,the effect of FDI attacks in the measurement channel and random time-delay on the communication network is considered,and a closed-loop system model with FDI attack,random time-delay,and external disturbance is established.Secondly,the sufficient conditions for the asymptotic stability of the closed-loop system under FDI attacks are derived based on the Lyapunov stability theory,and then the design scheme of H-infinity dynamic output feedback controller by utilizing linear matrix inequality technology is presented.Finally,a simulation example is given to demonstrate the feasibility and effectiveness of the proposed method.