DOS攻击下非线性NCSs观测器与控制器协同设计

Co-Design of Nonlinear NCSs Observer and Controller under DOS Attacks

针对网络系统中存在的阻碍网络通信问题,本文基于观测器,研究了一类非线性网络控制系统在非周期拒绝服务(denial of service,DOS)攻击下的控制问题。设计了一种弹性事件触发方案,并充分考虑非周期DOS攻击和事件触发方案的影响,基于T-S模糊模型,建立了一种切换系统模型。通过构造Lyapunov-Krasovskii泛函,并基于线性矩阵不等式方法,分析了系统的渐近稳定性,提出了一种控制器和观测器的协同设计方法。最后,以文献[13]中的卡车拖车系统为例,通过Matlab的LMI工具箱进行仿真验证。仿真结果表明,切换系统在非周期的DOS攻击下是渐进稳定的,验证了所得结果的有效性。该研究对非线性网络控制系统抵抗外部攻击具有重要意义。

This paper studies the observer-based control problem of a class of nonlinear networked control systems under aperiodic denial of service(DOS)attacks.A flexible event-triggered scheme is designed,and based on the T-S fuzzy model,a switching system model is established which fully considers the impact of aperiodic DOS attacks and event-triggered schemes.By constructing the Lyapunov-Krasovskii functional and based on the linear matrix inequality method,the asymptotic stability of the system is analyzed,and a collaborative design method of controller and observer is proposed.Finally,it takes the truck-trailer system in[13]as an example,and uses Matlab′s LMI toolbox for simulation verification.The simulation results show that the switching system is asymptotically stable under aperiodic DOS attacks,which verifies the validity of the obtained results.This research is of great significance for the nonlinear networked control system to resist external attacks.