混合攻击下直流微电网的FDI估计与模糊控制联合设计

Joint design of FDI estimation and fuzzy control for DC microgrid under hybrid attacks

研究基于T-S模糊模型的直流微电网(DC-MG)系统在拒绝服务(DoS)和虚假数据注入(FDI)混合攻击下的协同估计控制框架.考虑网络化T-S模糊模型和并行分布补偿(PDC)模糊控制规则中的非均匀时间尺度,建立DC-MG系统的T-S模型.为了放宽现有的DoS攻击模型通常假定攻击的频率和持续时间均有限的要求,在攻击信号的休眠和活跃期的已知范围内提出一种新的DoS攻击模型.同时,构造一个切换脉冲观测器来估计由外部动态系统产生的未知FDI攻击信号.然后,利用依赖于攻击参数的时变Lyapunov函数方法,导出系统在混合攻击下的指数稳定性判据.此外,基于线性矩阵不等式给出了模糊控制器和FDI攻击观测器的联合设计方法.最后,通过案例研究验证了所提出理论结果的有效性.

This paper studies the cooperative estimation control framework of a DC microgrid(DC-MG)system based on a T-S fuzzy model under the hybrid attacks of denial of service(DoS)and false data injection(FDI).The T-S model of the DC-MG system is established considering the non-uniform time scale of parallel distributed compensation(PDC)fuzzy control rules and the networked T-S fuzzy model.In order to relax the requirement that existing DoS attack models usually assume that the attack frequency and duration are limited,a new DoS attack model is proposed within the known range of the sleep and active periods of the attack signal.At the same time,a switching pulse observer is constructed to estimate the unknown FDI attack signal generated by the external dynamic system.Then,using the time-varying Lyapunov function method depending on the attack parameters,the exponential stability criterion of the system under hybrid attacks is derived.In addition,a joint design method of the fuzzy controller and the FDI attack observer based on linear matrix inequality is presented.Finally,the effectiveness of the proposed theoretical results is verified by a case study.