FDI攻击下异构互联信息物理系统分布式攻击估计  

Distributed attack estimation of heterogeneous interconnected cyber-physical systems under FDI attacks

作　　者：陈丽 郭胜辉 CHEN Li;GUO Sheng-hui(School of Electronic and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学电子与信息工程学院,江苏苏州215009

出　　处：《控制与决策》2024年第12期4073-4082,共10页Control and Decision

基　　金：江苏省研究生科研与实践创新计划项目(KYCX22_3274);江苏高校境外研修计划项目。

摘　　要：针对含有虚假数据注入(false data injection, FDI)攻击和传感器故障的异构互联信息物理系统,研究分布式攻击估计器设计问题.首先,将系统状态和传感器故障增广成等价的广义状态空间模型,利用该模型和子系统间的关联信息设计分布式攻击估计观测器.在分布式观测器的设计中,引入中间变量和输出估计误差反馈项,使观测器具有灵活的参数矩阵结构,适用于不同状态维度子系统组成的异构系统,实现对攻击信号和传感器故障的同时估计.其次,对动态误差系统进行稳定性分析,利用H∞性能来抑制攻击信号和外部干扰对估计效果的影响,同时以线性矩阵不等式的形式给出观测器增益矩阵的求解方法.最后,通过数值仿真和对比仿真验证所提攻击估计方法的可行性.The problem of distributed attack estimator design is studied for heterogeneous interconnected cyber-physical systems with false data injection(FDI)attacks and sensor faults.Firstly,the system state and sensor fault are augmented into an equivalent generalized state space model,and the distributed attack estimation observer is designed by using the model and the correlation information between subsystems.In the design of the distributed observer,the intermediate variable and the output estimation error feedback term are introduced so that the observer has a flexible parameter matrix structure,which is suitable for heterogeneous systems composed of subsystems with different state dimensions and realizes the simultaneous estimation of attack signals and sensor faults.Then,the stability of the dynamic error system is analyzed,and the H performance is employed to suppress the influence of attack signals and external disturbances on the estimation effect.Meanwhile,the solution method of the observer gain matrix is obtained as a linear matrix inequality.Finally,the feasibility of the proposed attack estimation method is verified by numerical simulation and comparative simulation.

关 键 词：FDI攻击 互联信息物理系统 异构系统 分布式观测器 状态估计 攻击估计 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]