The Performance Analysis of Different Topology Structures of High-Speed Train Based on Industrial Ethernet

2014 ◽  
Vol 687-691 ◽  
pp. 2379-2382
Author(s):  
Chong Hui Ren ◽  
De Qiang He
Keyword(s):  
Network Topology ◽  
Network Structure ◽  
High Speed ◽  
Reference Value ◽  
Industrial Ethernet ◽  
High Speed Train ◽  
Network Topologies ◽  
Application Data ◽  
Ladder Network

The industrial Ethernet technology has been gradually applied to the high-speed train. However, different network topologies can have big impact on the quality of communication. The real-time and reliability performances of the high-speed train to which three kinds of network topology structures of the linear, the ring and the ladder are applied based on industrial Ethernet are analyzed in theory according to IEC61375(2009). Four kinds of application data are built to modify the data transmission in this paper. The three structures are simulated with the OPNET modeler. Afterwards, the network performances are compared in the simulation. At last, a conclusion that the performance of the ladder network structure is superior to that of the linear and the ring network structure is drew. The results of the study could provide the reference value of the construction and majorization of the network topology structure based on the industrial Ethernet.

Research on the Network Topology and Reliability of the Communication System in Smart Substations

2013 ◽  
Vol 765-767 ◽  
pp. 1757-1760
Author(s):  
Zhi Ming Wang ◽  
Xian Li Sun ◽  
Li Liu ◽  
Xiao Rui Zhang
Keyword(s):  
Network Topology ◽  
Network Performance ◽  
Vital Role ◽  
Network System ◽  
Entire System ◽  
Advantages And Disadvantages ◽  
Network Topologies ◽  
The Relationship ◽  
Smart Substation

Communication network plays a vital role in smart substations. Different network topology provides different network performance, while the quality of network performance directly impacts the reliability of the entire system. In view of the network topology of smart substations, this paper compares the advantages and disadvantages of different network topologies as well as different network schemes of substation layer and process layer, and also analyzes the relationship between the reliability of network system and network topology, which play an important role in establishing a reliable and efficient smart substation system.

Study on Evaluation Method of High-Speed Train Based on Bipartite Graph

2013 ◽  
Vol 364 ◽  
pp. 843-848
Author(s):  
Ling Xuan Li ◽  
Yuan Yua Ma ◽  
Zi Liang Liu
Keyword(s):  
Resource Allocation ◽  
Bipartite Graph ◽  
High Speed ◽  
Evaluation Method ◽  
High Speed Train ◽  
Key Factors ◽  
Performance Indices ◽  
High Speed Trains ◽  
High Influence

Based on the resource allocation method of bipartite graph projected to one-mode graph, the bipartite graph network is established using six evaluating comfortableness indices and seven subsystems of high-speed train as the vertices. Our research shows that: This method can be used to find out the key factors which have high influence on the high-speed trains comprehensive comfortableness; also its ratio can be obtained. The overall quality of the high-speed train also can be forecasted by this method if the seven subsystems performance indices are given. Meanwhile, the interacting dependency level among the indices can be obtained.

The Effect of Single Pulse, Double Pulse and ForceArc MIG Welding Technology on Mechanical Properties of Welding Joint for 5083 Aluminum Alloy Used in High-Speed Train Body

2011 ◽  
Vol 337 ◽  
pp. 460-465
Author(s):  
Lei Su ◽  
Yuan Nie ◽  
Hua Ji ◽  
Chuan Ping Ma ◽  
Shao Hua Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Single Pulse ◽  
Double Pulse ◽  
High Speed Train ◽  
Welding Joint ◽  
5083 Aluminum Alloy ◽  
Very High

The technology of lightening manufacture for aluminum alloy train body is one key of manufacturing high-speed train . The train body is a whole bearing loading tubular structure which is welded together by the large, hollow, thin-walled aluminum extrusion. Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components. To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.

System Fault Sequence Prediction on CRH2 EMU Based on Improved GSP Algorithm

2014 ◽  
Vol 945-949 ◽  
pp. 2405-2408
Author(s):  
Xin Yu Liu
Keyword(s):  
Preventive Maintenance ◽  
High Speed ◽  
Reference Value ◽  
System Failure ◽  
High Speed Train ◽  
Sequence Prediction ◽  
Safety And Reliability ◽  
Train System

Nowadays, safety and reliability in a system are becoming more and more important. The prediction on the system's failure sequence has been the focus of research. In this paper GSP algorithm is improved in two aspects, then used for the specific application of high-speed EMU CRH2A systematic fault sequence and received good result that has certain reference value for high-speed train system failure and preventive maintenance.

Research on the Failure Mechanism of Flash Welded Rail

2011 ◽  
Vol 314-316 ◽  
pp. 1100-1106
Author(s):  
Yong Hui Zhu ◽  
Hui Chen ◽  
Zhong Yin Zhu ◽  
Chuan Ping Ma ◽  
Li Jun Wang ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
High Speed ◽  
Fatigue Cracking ◽  
High Speed Train ◽  
Joint Fracture ◽  
Calcium Aluminates ◽  
Welding Joints ◽  
Train Safety ◽  
Flash Welding

For the high speed train, safety is the most important factor. Flash welding is the primary technology for the seamless line rail in Chinese railway. So the quality of the flash welded joints is the most important. This paper presents the situation of joint fracture in rail flash welding joints and analyses the failure mechanism through macroscopic and microscopic observation. The result demonstrate that the cracking of the rail is fatigue-crack propagation，the fatigue cracking is caused by alumina calcium-Aluminates-non-metallic inclusion．

Sound insulation quality of the windows for high speed train

2003 ◽  
Vol 2003.12 (0) ◽  
pp. 37-40 ◽  
Author(s):  
Masahiko HORIUCHI ◽  
Katufumi HASHIMOTO ◽  
Hitoshi SHIRAISHI ◽  
Satoru AKIYAMA ◽  
Yasufumi MINAMIMOTO
Keyword(s):  
High Speed ◽  
Sound Insulation ◽  
High Speed Train ◽  
Insulation Quality

scholarly journals Capturing the interplay of dynamics and networks through parameterizations of Laplacian operators

2016 ◽  
Vol 2 ◽  
pp. e57 ◽  
Author(s):  
Xiaoran Yan ◽  
Shang-hua Teng ◽  
Kristina Lerman ◽  
Rumi Ghosh
Keyword(s):  
Network Topology ◽  
Network Structure ◽  
Graph Partitioning ◽  
Laplacian Matrix ◽  
Dynamical Process ◽  
Dynamical Processes ◽  
Quality Function ◽  
The Impact ◽  
Laplacian Operators

We study the interplay between a dynamical process and the structure of the network on which it unfolds using the parameterized Laplacian framework. This framework allows for defining and characterizing an ensemble of dynamical processes on a network beyond what the traditional Laplacian is capable of modeling. This, in turn, allows for studying the impact of the interaction between dynamics and network topology on the quality-measure of network clusters and centrality, in order to effectively identify important vertices and communities in the network. Specifically, for each dynamical process in this framework, we define a centrality measure that captures a vertex’s participation in the dynamical process on a given network and also define a function that measures the quality of every subset of vertices as a potential cluster (or community) with respect to this process. We show that the subset-quality function generalizes the traditional conductance measure for graph partitioning. We partially justify our choice of the quality function by showing that the classic Cheeger’s inequality, which relates the conductance of the best cluster in a network with a spectral quantity of its Laplacian matrix, can be extended to the parameterized Laplacian. The parameterized Laplacian framework brings under the same umbrella a surprising variety of dynamical processes and allows us to systematically compare the different perspectives they create on network structure.

scholarly journals Analysis of Effect of Pantograph Cover on the Current Collection Quality of High Speed Train using Real Train Experiment

2016 ◽  
Vol 19 (4) ◽  
pp. 409-416
Author(s):  
Hyuck Keun Oh ◽  
Seogwon Kim ◽  
Yong-hyun Cho ◽  
Minho Kwak ◽  
Sam Young Kwon
Keyword(s):  
High Speed ◽  
High Speed Train ◽  
Current Collection

scholarly journals Dynamic Control of High-speed Train Following Operation

2014 ◽  
Vol 26 (4) ◽  
pp. 291-297 ◽  
Author(s):  
Deng Pan ◽  
Yingping Zheng
Keyword(s):  
Real Time ◽  
Collision Avoidance ◽  
High Speed ◽  
Dynamic Control ◽  
Behavioral Adjustment ◽  
Control Law ◽  
High Speed Train ◽  
Velocity Difference ◽  
Time Calculation

Both safety and efficiency should be considered in high-speed train following control. The real-time calculation of dynamic safety following distance is used by the following train to understand the quality of its own following behavior. A new velocity difference control law can help the following train to adjust its own behavior from a safe and efficient steady-following state to another one if the actual following distance is greater than the safe following distance. Meanwhile, the stopping control law would work for collision avoidance when the actual following distance is less than the safe following distance. The simulation shows that the dynamic control of actual inter-train distance can be well accomplished by the behavioral adjustment of the following train, and verifies the effectiveness and feasibility of our presented methods for train following control.

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