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<p>This paper addresses the design of an observer-based controller and synthesis issue for wireless networked control systems (WNCSs), considering DOS attacks and time delays for two observer positions: observer at the system side and observer at the controller side. The open nature of the communication network renders WNCSs more vulnerable to denial of service jamming (DoSJ) attacks than their wired counterparts. These attacks can lead to performance degradation and instability of the system. Additionally, packet losses resulting from attacks are assumed to introduce time delays. To mitigate the threat of attacks and reduce their impact on the desired system performance, as well as considering other uncertainties such as environmental noise, sufficient conditions in terms of linear matrix inequalities are derived for the existence of an observer-based controller for both observer positions. These conditions ensure that the closed-loop system of the stochastic nonlinear WNCS is exponential mean- square stable with the Lyapunov stability method. Finally, two practical examples based on an Internet-based test rig and a Chuafs oscillator circuit system represented to evaluate the effectiveness of designed techniques and compare performance for both observer position scenarios.</p>

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Observer-based controller design for class of nonlinear wireless stochastic networked systems with communication delays and denial of service jamming attacks: comparison of observer position

  • 期刊论文

  • 发表日期：

    2025年1月14日

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  • Mahdi Esmaeeli Hesari,
  • Amir Ali Bagheri,
  • Mohsen Davoudi,
  • Naser Pariz

摘要

This paper addresses the design of an observer-based controller and synthesis issue for wireless networked control systems (WNCSs), considering DOS attacks and time delays for two observer positions: observer at the system side and observer at the controller side. The open nature of the communication network renders WNCSs more vulnerable to denial of service jamming (DoSJ) attacks than their wired counterparts. These attacks can lead to performance degradation and instability of the system. Additionally, packet losses resulting from attacks are assumed to introduce time delays. To mitigate the threat of attacks and reduce their impact on the desired system performance, as well as considering other uncertainties such as environmental noise, sufficient conditions in terms of linear matrix inequalities are derived for the existence of an observer-based controller for both observer positions. These conditions ensure that the closed-loop system of the stochastic nonlinear WNCS is exponential mean- square stable with the Lyapunov stability method. Finally, two practical examples based on an Internet-based test rig and a Chuafs oscillator circuit system represented to evaluate the effectiveness of designed techniques and compare performance for both observer position scenarios.