Abstract
This paper focuses on dynamic output feedback control of Cyber-Physical Systems (CPS) under Denial-of-Service (DoS) attacks. Firstly, by analyzing the different effects of DoS attacks on the sensor-to-controller (S-C) channel and the controller-to-actuator(C-A) channel respectively, a switching system modeling method for the dynamic output feedback CPS is presented. Considering the bandwidth of the two channels is different and the energy limitation of the attacker, it is fair to assume that an attacker can only jam one communication channel at each time step and the maximum number of consecutive DoS attacks is bounded. Secondly, according to a packet-based transmission scheme, a nested switching model considering both the spatial variability and the temporal persistence of DoS attacks is constructed on the basis of the switching system. Then, the exponential stability condition of the dynamic output feedback CPS is obtained, and a controller design method based on linear matrix inequality is proposed. Finally, a simulation example is given to verify the effectiveness of the proposed method.
Highlights
Embedded technology, computer technology and automatic control technology have developed vigorously and crossed each other in recent years, which make control, communication and computation highly integrated, and build a bridge between the information world and the physical world, promoting the development of Cyber-Physical System (CPS)
2) By use of the proposed nested switching system model, the exponential stability of CPS under DoS attacks is discussed, and the designed dynamic output feedback controller can be used to give a series of future control inputs for the successful transmission time of packets
It can be seen that CPS can keep stable under the action of based on Theorem 6 can achieve better convergence. In this sense, when the maximum number of continuous DoS attacks is bounded, the proposed dynamic output feedback control method based on nested switching system can guarantee the stability of CPS
Summary
Computer technology and automatic control technology have developed vigorously and crossed each other in recent years, which make control, communication and computation highly integrated, and build a bridge between the information world and the physical world, promoting the development of Cyber-Physical System (CPS). Yuan et al [24] discuss the flexible control based on switching system method, and propose a hybrid theoretical framework in which the controller will switch in accordance with the competing result of the cyber attacker and defender This classification method does not consider the impact of DoS attacks on different communication channels of the system fundamentally. Based on the above discussion, the objective of this paper is to design a dynamic output feedback controller to tackle the DoS attacks problem for CPS. 2) By use of the proposed nested switching system model, the exponential stability of CPS under DoS attacks is discussed, and the designed dynamic output feedback controller can be used to give a series of future control inputs for the successful transmission time of packets.
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