摘要
以存在网络延迟的NCSs为研究对象,结合事件触发机制,研究遭受拒绝服务攻击(DoS)的NCSs稳定性问题。在DoS攻击过程中,NCSs的传感器无法接收测量信息或者执行器无法获取控制信息,会存在不稳定的子系统。为了提高NCSs的稳定性,首先,把存在网络时延和DoS攻击的NCSs系统建模成包含稳定子系统和不稳定子系统的闭环切换系统模型;接着,基于切换系统分析方法,得到该系统指数稳定的充分条件;进一步,分析DoS攻击的时间比率,只要DoS攻击时间比例在有效范围,不论DoS攻击如何作用于系统,总能保证该系统的指数稳定性。实验结果表明,当0<δ<3时,网络控制系统能获得相应的指数稳定性,验证了此方法在DoS攻击下,具有事件触发机制NCSs稳定的有效性。
This paper takes networked control systems(NCSs) with network-induced delay as the research object, combined with the event-triggered mechanism, which studies the stability of NCSs under denial of service(DoS) attacks. In the process of DoS attacks, the sensor of NCSs cannot receive the measurement information in time, or the actuator cannot get the control information, then there will be unstable subsystems. In order to improve the stability of NCSs, firstly, NCSs is modeled as a closed-loop switched system with both stable subsystems and unstable subsystems. The model can handle of network-induced delay and DoS attacks uniformly. Then, based on the analysis method of the switched system, a sufficient condition is derived from the concerned NCSs to be exponentially stable. Furthermore, the time ratio of the DoS attack is also analyzed, the concerned NCSs is always guaranteed to be exponentially stable, as long as the occurring probability of DoS attacks is in the effective range. Finally, the experimental results show that NCSs can obtain the corresponding exponential stability for 0<δ<3;the stability of NCSs with event-triggered mechanism under the DoS attack is given to show the effectiveness of the proposed result.
作者
申玉斌
费敏锐
Shen Yubin;Fei Minrui(School of Information Engineering,Henan University of Animal Husbandry and Economy,Zhengzhou 450044,China;School of Mechatronics Engineering and Automation,Shanghai University,Shanghai 200444,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2020年第3期51-57,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(61633016)资助项目。
关键词
DOS攻击
网络化控制系统
事件触发
安全性
指数稳定性
WIRTINGER不等式
denial of service(DoS)attacks
networked control systems(NCSs)
event-triggered
security
exponential stability
Wirtinger-based inequality
