Piao Xianglin, Lin Chong, Zhang Man, Chen Bing
Institute of Complexity Science, Shandong Key Laboratory of Industrial Control Technology, School of Automation, Qingdao University, Qingdao 266071, China.
ISA Trans. 2024 Jan;144:11-17. doi: 10.1016/j.isatra.2023.10.013. Epub 2023 Oct 16.
This paper investigates the attack estimation and state reconstruction problem for linear cyber-physical systems with state delay and simultaneous sensor and actuator attacks. Reduced-order observer is designed for the augmented system to simultaneously estimate the actuator attack, sensor attack and the state of system. By adopting the double integral term into the Lyapunov-Krasovskii functional and decomposing the cross term, the delay-dependent results are obtained. The method proposed in this paper can accurately estimate the state, actuator and sensor attacks simultaneously without additional design. Compared with the previous method, the time delay information is fully utilized and the conservation is greatly reduced. Finally, the correctness of the results is verified by simulation.
本文研究了具有状态延迟以及同时存在传感器和执行器攻击的线性网络物理系统的攻击估计和状态重构问题。针对增广系统设计了降阶观测器，以同时估计执行器攻击、传感器攻击和系统状态。通过在Lyapunov-Krasovskii泛函中引入双重积分项并分解交叉项，得到了依赖于延迟的结果。本文提出的方法无需额外设计即可同时准确估计状态、执行器和传感器攻击。与先前方法相比，充分利用了时间延迟信息，大大降低了保守性。最后，通过仿真验证了结果的正确性。
