Research On The Enhancement Strategy And Optimization Of Cyber-physical Systems Robustness

Cyber-Physical System is one kind of interdependent networks and is designed to seamlessly integrate computing components,networks,and physical devices into a certain environment for specific purposes.The system properties and characteristics of interdependent networks determine that the failure of nodes in a single network will be propagated to the entire system,seriously affecting the robustness of the system,and leading to cascading failures.The impact of cascading failures in interdependent networks will affect more nodes than in a single network and then the entire system is more vulnerable to being totally destroyed.Based on the extensive application of cyber-physical systems in daily life,maintaining the normal work of cyber-physical system is to maintain our normal daily lives.Therefore,it is particularly important to enhance the robustness of the cyber-physical system.In the real world,the single network type,single network node size,and the coupling relationship between networks of cyber physical systems are not exactly the same.Therefore,both one-to-multiple coupled heterogeneous interdependent networks and one-to-one coupled homogeneous interdependent networks are constructed in the experiments to simulate cyberphysical systems.Next,on the basis of the established model,the strategy of increasing the number of the intra-links in the interdependent network and swapping the inter-links between interdependent networks are proposed to enhance the robustness of the network.A new cyberphysical system model is obtained by different strategies which change the topology relationship between nodes in the network.Random attacks have occurred to the model which we have constructed.The percolation theory is used to statistically analyze the proportion of nodes in the giant component after different random attack proportions.Finally,the best strategies to enhance the robustness of the cyber-physical system are obtained by comparing the size of giant component after the above cascade failure.In the summary,the strategy with the best robustness can be obtained under the corresponding conditions by analyzing the effects of the robustness of the cyber-physical system under different strategies.