Research On The Stability Of Attack Network Control System Based On Event Triggering

In recent years,the network control system under the event trigger mechanism has been studied by network attacks and other issues,which has attracted widespread attention from foreign and domestic scholars.Among various network attacks,denial of service attacks are considered to be the most likely to NCSs.The type of cyber attack that has a significant impact on performance.Existing results on the issue of event triggering do not take into account the occurrence of DoS attacks and controller changes,which can reduce the control performance of the addressed system.Based on the existing results,there are still the following limitations: first,most of the existing results only study the case where there is a DoS attack on the sensor side,and rarely study the case where both the controller and the sensor side have DoS attacks;second,There have been few studies on event triggering mechanisms,DoS attacks,and joint design methods of controllers.In order to improve the above-mentioned limitations,it is necessary to study the new dual-end elastic event trigger mechanism.In the presence of DoS attacks,improve the existing event mechanism,propose a more efficient event mechanism,improve the anti-interference ability of the system,and conduct a certain amount of research on the issue of event trigger mechanism,DoS attacks and the controller.The main content of this article is as follows:(1)For the network control system with or without DoS attacks,the stability of the network control system under DoS attack status feedback triggered by double-end elastic events is studied.First,this paper proposes a new double-ended flexible event-triggered transmission scheme.Secondly,the DoS attack model is introduced into the control system.Then,considering the dual-end elastic event triggering mechanism,DoS attacks,and parameters affecting network performance,a closed-loop switching system model is established.The stability criterion of system performance was obtained,and the parameters of the elastic event mechanism and controller were obtained.Finally,simulations show that the proposed method can well meet the control performance requirements and offset known periodic DoS attacks,which not only saves a lot of resources,but also greatly improves the system's ability to resist disturbances.(2)Because the state of the controlled object is usually not directly measurable,and there are cases of DoS attacks in the network control system,this paper studies the stability of NCSs under the feedback of DoS attacks triggered by double-end elastic events.First,this paper proposes a new double-ended flexible event-triggered transmission scheme that relies on output objects and controller information.Secondly,based on the double-end elastic event trigger mechanism and DoS attack model,a closed-loop switching system model is established.Then,the stability criterion of the system performance is guaranteed,and the double-end elastic event mechanism and the controller with dynamic output are designed.Finally,through simulation,the dual-end elastic event triggering mechanism proposed in this paper is tested,which can not only offset the impact of DoS attack interference,save network resources,but also better ensure system performance.(3)Aiming at DoS-attacked network control systems,this paper combines dual-end elastic event-triggered control,DoS attacks,and quantitative feedback control to study the stability of NCS for DoS attacks quantitative feedback triggered by dual-end elastic events.First,this paper proposes a new double-ended flexible event-triggered transmission scheme.First,the corresponding pair of quantizers are introduced in turn at the ports of the controller and sensors.Secondly,DoS attacks,flexible event triggers,network delays,and quantization mechanisms are introduced into the system to establish a closed-loop switching model.Then,the stable criterion of system performance was guaranteed,the design of the quantitative controller was completed,and the elastic event trigger mechanism and the parameters of the controller were obtained.Finally,simulation examples show that the method can well meet the control performance requirements and offset known periodic DoS attacks,which not only saves limited resources,but also improves the anti-interference ability of the system.