信息物理系统的鲁棒攻击检测器设计

Robust Attack Detector Design for Cyber-Physical System

文章研究了信息物理系统物理层执行器的攻击检测问题.首先对整个信息物理系统建立一个动态模型,对于执行器存在的攻击信号,基于提出的假设条件,设计了一类攻击检测器.其次,利用Lyapunov稳定性理论分析系统的稳定性,使得观测器分别具有H∞与L2-L∞性能,并最终转化为线性矩阵不等式的形式以求解增益矩阵,再通过比较残差评价函数和系统动态阈值的大小来判断是否存在攻击.最终给出一个仿真实例验证所提方法的正确性和有效性.

The problem of attack detection for the physical layer actuator of cyber-physical systems is studied in this paper.First,a dynamic model is established to describe the whole cyber-physicalsystems.On the premise that there is an attack signal in the actuator,a class of attack detector is designed based on the assumptions.The Lyapunov stability theory is applied to analysed the stability of the system,so that the observer satisfies the H∞and L2-L∞performance conditions respectively,and finally it can be transformed into the form of linear matrix inequality,in this way,the gain matrix can be solved.Finally,a simulation example is given to demonstrate the accuracy of the design method.