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DOS攻击下非线性NCSs观测器与控制器协同设计

2021-07-20胡亚猛林崇

关键词:控制器文献协同

胡亚猛 林崇

摘要:  針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TS模糊模型,建立了一种切换系统模型。通过构造LyapunovKrasovskii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。

关键词:  DOS攻击; 网络控制系统; LyapunovKrasovskii泛函; 事件触发方案; 控制器

中图分类号: TP271.62  文献标识码: A

4 结束语

本文结合文献[13]提出的网络化TS模糊系统基于观测器的控制器设计方法,引入了非周期的DOS干扰攻击下,将文献[15]中线性网络系统在周期性DOS攻击下基于观测器的控制器设计问题推广至非线性系统。为了应对非周期性的DOS干扰攻击,提出了一种动态事件触发方案,并且充分考虑了事件触发方案和DOS干扰攻击对原系统前提变量和隶属度函数的影响,建立了基于TS模糊模型的切换系统模型。在此基础上,提出了观测器、控制器和事件触发方案的协同设计方法,并通过仿真实例,验证了本文所提出设计方法的有效性。下一步将考虑存在的外部干扰情况或考虑其他攻击方式,例如欺诈攻击和混合攻击。

参考文献:

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[2] Liu D, Yang G H, Er M J. Eventtriggered control for TS fuzzy systems under asynchronous network communications[J]. IEEE Transactions on Fuzzy Systems, 2020, 28(2): 390399.

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[12] Zhang K, Jiang B, Shi P, et al. Analysis and design of robust H∞ fault estimation observer with finitefrequency specifications for discretetime fuzzy systems[J]. IEEE Transactions on Cybernetics, 2015, 45(7): 12251235.

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