Hu Songlin, Yue Dong, Cheng Zihao, Tian Engang, Xie Xiangpeng, Chen Xiaoli
IEEE Trans Cybern. 2021 Sep;51(9):4591-4601. doi: 10.1109/TCYB.2020.3001187. Epub 2021 Sep 15.
This article is concerned with the problem of observer-based dynamic event-triggered control for a networked control system (NCS) under a class of power-constrained denial-of-service (DoS) attacks that aim at impeding the network communication from time to time. First, by carefully modeling such DoS attacks as aperiodic pulse-width-modulated (PWM) jamming signals, a switching observer, adapting to the DoS attacks, is delicately constructed to deal with the unavailability of full-state information. Second, to economize the limited bandwidth resources, a dynamic event-triggered communication scheme is designed under the aperiodic DoS jamming attacks, whose duration and frequency are assumed to be restricted. Third, a switching system model with artificial state delay is formulated, which characterizes the effects of the aperiodic DoS attacks and event-triggered communication scheme in a unified framework. Then, the asymptotic stability analysis and controller/observer synthesis conditions of the resulting switching system are obtained by using a piecewise Lyapunov-Krasovskii functional approach. Furthermore, a co-design method of the dynamic triggering parameters, controller, and observer gains is presented. Finally, an example is employed to verify the effectiveness of the obtained results.
本文关注一类受功率限制的拒绝服务（DoS）攻击下网络控制系统（NCS）基于观测器的动态事件触发控制问题，这类攻击旨在不时阻碍网络通信。首先，通过将此类DoS攻击精心建模为非周期脉宽调制（PWM）干扰信号，精心构造一个适应DoS攻击的切换观测器，以应对全状态信息不可用的情况。其次，为节省有限的带宽资源，在非周期DoS干扰攻击下设计了一种动态事件触发通信方案，假定其持续时间和频率受到限制。第三，建立了一个具有人为状态延迟的切换系统模型，该模型在统一框架中刻画了非周期DoS攻击和事件触发通信方案的影响。然后，利用分段Lyapunov-Krasovskii泛函方法得到了所得切换系统的渐近稳定性分析以及控制器/观测器综合条件。此外，还提出了一种动态触发参数、控制器和观测器增益的协同设计方法。最后，通过一个例子验证了所得结果的有效性。
