未知周期DoS攻击下奇异摄动信息物理系统H∞滤波设计
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作者单位:

中国矿业大学

作者简介:

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中图分类号:

TP273

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


H∞ filter design for the singularly perturbed cyber-physical system under unknown period DoS attack
Author:
Affiliation:

China University of Mining and Technology

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    针对奇异摄动信息物理系统在未知周期拒绝服务攻击 (denial-of-service, DoS) 下的状态估计问题,提出 事件触发多时间尺度切换滤波器设计方法. 首先,在传感器与滤波器之间引入事件触发机制确定采样数据是否 传输至网络中,可以达到节约网络资源的目的;然后,在此事件触发机制的基础上,考虑未知周期 Dos 攻击问 题,建立滤波误差切换系统,通过构建依赖奇异摄动参数的 Lyapunov 函数,提出奇异摄动信息物理系统切换滤 波器设计方法,得到了较小的估计误差,克服了设计过程中的病态数值问题,降低了在网络通信中 DoS 攻击对 系统的不良影响,保证误差系统指数稳定且满足 H∞ 性能,实现未知周期 DoS 攻击下系统的状态估计. 最后, 利用电路仿真算例进行验证,结果表明本文所提出滤波器设计方法的有效性.

    Abstract:

    To solve the problem of state estimation of singularly perturbed information physical system under unknown cycle denial-of-service (DoS) attack, a design method of event-triggered multi-time scale switching filter was proposed. Firstly, an event triggering mechanism is introduced between the sensor and the filter to determine whether the sampled data is transmitted to the network, which can save the network resources. Then, On the basis of this event triggering mechanism, considering the DoS attack problem of unknown cycle, a filtering error switching system is established. by constructing a Lyapunov function which depends on singular perturbation parameters, a switching filter design method for singular perturbation information physical system is proposed, which reduces the estimation error, overcomes the “ill-conditioned numerical problems” in the design process, reduces the adverse effect of DoS attack on the system in network communication, and ensures the exponential stability of the error system and satisfies H∞ performance, so the system state estimation under unknown cycle DoS attack is realized. Finally, a circuit simulation example is used to verify the effectiveness of the filter design method.

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  • 收稿日期:2021-03-22
  • 最后修改日期:2021-08-26
  • 录用日期:2021-09-10
  • 在线发布日期: 2021-09-17
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