DoS攻击下的一类信息物理系统的保性能控制

Guaranteed Cost Control for a Class of Cyber-Physical Systems Under DoS Attacks

考虑一类信息物理系统(CPS)中传感器与控制器之间的通信信道遭受随机DoS攻击,建立了一种能同时反映随机DoS攻击和信道固有随机数据包丢失对通信质量影响的统一随机干扰模型,采用基于观测器的输出反馈控制策略,研究了随机DoS攻击下CPS的保性能控制问题;利用Lyapunov函数和线性矩阵不等式得到了实现CPS指数均方稳定的充分条件,并将保性能控制器的设计转化为一个凸优化问题的求解.理论推导和数值仿真表明,文中提出的控制策略能够实现一类具有信道固有数据包丢失的CPS在DoS攻击下的保性能控制.

Considering the communication channel between the sensor and the controller in a class of CPSs （ Cyber-physical Systems） which is under stochastic DoS attacks, a stochastic interference model is established within a unified framework to reflect the impacts of stochastic DoS attacks and the inherent stochastic packet dropouts on the communication quality. The guaranteed cost control problem for the CPS under stochastic DoS attacks is investiga-ted by an observer-based output feedback control method. Sufficient condition is obtained to exponentially stabilize the CPS under stochastic DoS attacks in mean-square by means of the Lyapunov function and linear matrix inequality method, and the design of the controller can be converted into a solution of a convex optimisation problem. Theore-tical derivation and simulation examples are used to demonstrate that the proposed control strategy can achieve gua-ranteed cost control for a class of CPSs with inherent packet dropouts under DoS attacks.