scholarly journals Survivability Evaluation Method for Cascading Failure of Electric Cyber Physical System Considering Load Optimal Allocation

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Zhaoyang Qu ◽  
Yunchang Dong ◽  
Nan Qu ◽  
Lei Wang ◽  
Yang Li ◽  
...  
Keyword(s):  
Information Flow ◽  
Physical System ◽  
Power Flow ◽  
Evaluation Method ◽  
Optimal Allocation ◽  
Load Capacity ◽  
Evaluation Model ◽  
Coupled Systems ◽  
Cascading Failure ◽  
Cyber Physical System

The scale of the electric cyber physical system (ECPS) is continuously extending, and the existing cascade failure models ignore both the information flow and power flow transferring characteristics and also lack effective survivability analysis. In this paper, the quantitative evaluation method for cascading failure of ECPS survivability considering optimal load allocation is proposed. Firstly, according to the system topological structure and correlation, the degree-betweenness weighted correlation matrix of ECPS is established by defining the degree function as well as the electric betweenness, and the formal representation of coupled ECPS network model is realized. Secondly, based on the structural connectivity change and risk propagation range of ECPS cascade failure, the survivability evaluation model is designed by taking into account the constraints such as node load capacity limitation, information flow optimal allocation strategy, power flow optimization equation, and system safety operation. Finally, the firefly algorithm with chaotic Lévy flight is proposed to solve the evaluation model efficiently. The case study vividly shows that the evaluation method can effectively quantify the survivability of ECPS and thus enhance the evaluation efficiency of large-scale coupled systems.

Security Issues of CPS

2015 ◽  
pp. 140-160
Keyword(s):  
Control System ◽  
Information Flow ◽  
Physical System ◽  
Ad Hoc ◽  
System Security ◽  
Cyber Physical System ◽  
Ad Hoc Routing ◽  
Security Systems ◽  
Active Method ◽  
Security Issues

As cyber physical system security is not satisfactory, the security of a particular infrastructure depends on both internal and other related vulnerabilities. Communications between components in the cyber and physical realms lead to unintentional information flow. This chapter describes the difficult communications that occurs between the cyber and physical domains and their impact on security. Assailants may be competent to initiate exclusive attacks to cyber physical systems. There are several types of attacks that affect the interactions between the cyber and physical devices, which might be in a passive way or in an active method. Even though the communication provides authenticity and confidentiality, a few attacks form some threats against ad hoc routing protocols as well as location-based security systems. It has been said that many attacks modify the activities of the targeted control system.

scholarly journals Risk assessment for the cascading failure of electric cyber-physical system considering multiple information factors

2017 ◽  
Vol 2 (4) ◽  
pp. 155-160 ◽  
Author(s):  
Yanli Liu ◽  
Dongxu Lu ◽  
Liangchen Deng ◽  
Tianyuan Bai ◽  
Kai Hou ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Physical System ◽  
Cascading Failure ◽  
Cyber Physical System

Fuzzy Comprehensive Evaluation for Road Base Material Selection Based on Analytic Hierarchy Process

2015 ◽  
Vol 667 ◽  
pp. 353-358 ◽  
Author(s):  
Xin Qing Huang ◽  
Xin Qiu ◽  
Lin Wu Chen ◽  
Jin Hong Wu ◽  
Xiao Hua Luo
Keyword(s):  
Analytic Hierarchy Process ◽  
Evaluation Method ◽  
Material Selection ◽  
Load Capacity ◽  
Evaluation Model ◽  
Base Material ◽  
Fuzzy Comprehensive Evaluation ◽  
Analytic Hierarchy ◽  
Road Base ◽  
Hierarchy Process

This paper conducted the EN-1 ionic liquid improved soil comparison and evaluation between the stabilization soil and the stabilized aggregate materials in order to analyze its economic cost and solve the issues of road base material selection with the multiple influence factors. Firstly analytic hierarchy process (AHP) was used to establish the hierarchical structure of the decision index and the weight of each indicator in an index layer. Secondly the fuzzy relation matrix of the evaluation criteria were determined by expert evaluation method, and then a comprehensive fuzzy evaluation model can be established for the selection of road base materials. Finally, based on the comprehensive sequencing of different materials derived from fuzzy mathematical calculations, the optimal selection can be achieved. The proposed evaluation model comprehended the availability of material, construction requirements, load capacity, durability, energy consumption, environment protection and material cost etc. This research provided a theoretical basis as well as an effective and practical solution for the future development of highway construction in China.

Distributed optimal power flow and the multi-agent system for the realization in cyber-physical system

2021 ◽  
Vol 192 ◽  
pp. 107007
Author(s):  
Tung-Lam Nguyen ◽  
Quoc-Tuan Tran ◽  
Raphael Caire ◽  
Yu Wang ◽  
Yvon Besanger ◽  
...  
Keyword(s):  
Physical System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Cyber Physical System ◽  
Multi Agent System ◽  
Agent System ◽  
Optimal Power ◽  
Multi Agent ◽  
Distributed Optimal Power Flow
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