Research On Synchronous Control Methods Of Cyber Physical System Under Different Attack Strategies

In recent years,cyber-physical systems have received widespread attention due to the rapid development of network communication technology and its wide application in daily life.Cyberphysical system is a new generation system that tightly integrates embedded computing,network and controlled physical components.The integration does not mean the simple convergence of the physical domain and the cyber space.Cyber-physical systems play an important role in infrastructure and government agencies.The information exchanged is easily destroyed by malicious attackers due to the open network between the physical domain and cyberspace.The security of cyber physical systems is greatly threatened.Cyber attacks not only lead to system paralysis,but may also have an impact on the economy.Therefore,it is of far-reaching significance to improve the security of the cyber physical system.In the framework of cyberphysical system,this paper uses different control methods to study the security control of system under several different cyber attacks.In Chapter 2,pinning synchronization problem is investigated for complex cyber physical networks under strategic mixed attacks in cybersystem.Feedback gain matrices and coupling strengths are signed by some algorithms.By dint of geometrical method and inequality technique,sufficient conditions are established to guarantee robust synchronization for the complex cyberphysical networks.In Chapter 3,the consensus problem is investigated for complex cyber-physical networks with cyber attacks.A secure control framework is established for designing a robust sampled-data control law such that leader-following consensus is achieved.The sampling period,attack length rate are investigated based on the Lipschitz condition and QUAD condition,respectively.By using Lyapunov function and inequality technique,it is shown that robust leader-following consensus.In Chapter 4,the security problem is investigated for a class of second-order nonlinear cyberphysical systems under deception attacks with impulsive control and time delay.We design a speed switcher with time delay in the leader of the system.Under deception attacks,false signal will enter the systems,causing transmission signal differently from the real ones.To achieve bound consensus,impulsive control protocols are established.Finally,for the above results,some numerical simulations are provided to verify the feasibility and validity of the theory,respectively.