Event-Triggered Predictive Control For Networked Control Systems Under Denial-of-Service Attacks

Although networked control system has many advantages such as higher flexibility,lower cost and resource sharing,at the same time,it is easy to be attacked by DoS because of the openness of the network.At present,there are not many researches on positive compensation for the negative effects of DoS attacks.Therefore,based on the different types of DoS attacks,it has important theoretical value and practical application value to realize positive compensation for the negative effects of DoS attacks.The specific research work of this paper is as follows:For networked control systems,we first describe the periodic DoS attack model and the time-constrained DoS attack model respectively,and give the restriction conditions for the duration and frequency of the time-constrained DoS attack.Secondly,based on different DoS attack models,we give the corresponding discrimination conditions to select the appropriate prediction step size,and design the corresponding event triggering predictive control scheme to combine the networked control system,predictive control and event triggering mechanism together.Finally,by using Lyapunov stability theory and linear matrix inequality,sufficient conditions for the stability of networked control systems are obtained.For networked multi-agent systems,we first propose a distributed event triggering mechanism to reduce the burden of network communication.Secondly,based on the periodic DoS attack model,we give the discriminant conditions to select the appropriate prediction step size.Furthermore,a new cloud predictive control scheme is designed based on the combination of cloud storage and predictive control.It is studied that agents can only intermittently and asynchronously access cloud storage to obtain the information of neighbor agents stored in the cloud.Finally,using the method of Lyapunov stability theory,we systematically analyze the proposed scheme and obtain the sufficient conditions for realizing the consistency of the multi-agent system.For networked multi-agent systems with unmeasurable state,we consider replacing periodic DoS attacks with time-constrained DoS attacks with relatively greater difficulty,and meanwhile increase network delay.First,a state observer is introduced to estimate the state quantity,and the estimated state quantity is used as feedback control.Secondly,the networked multi-agent system,predictive control scheme,event triggering scheme and cloud storage are all combined to create a new event triggering cloud predictive control scheme based on state observer.Finally,using the method of Lyapunov stability theory,we systematically analyze the proposed scheme and obtain the sufficient conditions for realizing the consistency of the multi-agent system.