Reliability Research of Fiber-Access Devices Monitoring System on Fault Tree

2013 ◽  
Vol 760-762 ◽  
pp. 1317-1321
Author(s):  
Qi Gui Yao ◽  
Hai Yu ◽  
Yue Yu ◽  
Wei Wang
Keyword(s):  
Monitoring System ◽  
System Reliability ◽  
Theoretical Basis ◽  
Large Scale ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Tree Modeling ◽  
System Improvement ◽  
Important System

The method of fault tree analysis is an important method for complex system reliability analysis of large scale. Fiber-access devices monitoring system is an important system of electric power communication transmission. Firstly it introduces the method of fault tree analysis, and then use the fault tree modeling technique for the fault tree to model refers to the fault of optical access equipment monitoring system, and carries on the qualitative analysis and quantitative analysis. It provides theoretical basis for system improvement and maintenancs.

scholarly journals Fault tree analysis of large-scale blackout accidents

2019 ◽  
Vol 118 ◽  
pp. 01049
Author(s):  
Dong Fu ◽  
Song Gao ◽  
Zhenhong Yan ◽  
Hongye Wu ◽  
Xiaohu Xu ◽  
...  
Keyword(s):  
Theoretical Basis ◽  
Large Scale ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Minimum Cut ◽  
Analysis Method ◽  
Tree Analysis ◽  
Minimum Path ◽  
Structural Importance

Fault tree analysis method is used to analyze the large-scale blackout accidents. Minimum cut sets and minimum path sets of large-scale blackout accidents are calculated, and the structural importance degree of the accidents is analyzed according to the minimum path sets. Direct factors that cause large-scale blackout accidents are determined. Effective measures are put forward to prevent large-scale blackouts, and the theoretical basis is put forward to prevent large-scale blackouts.

Study on Reasons of the Falling of the Overhead Line Based on Fault Tree Analysis

2013 ◽  
Vol 325-326 ◽  
pp. 590-593
Author(s):  
Fei Xiang Wei ◽  
Yang Song ◽  
Xiao Xu Ma ◽  
Ying Qian
Keyword(s):  
Power System ◽  
System Reliability ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Power System Reliability ◽  
Overhead Line ◽  
Qualitative And Quantitative Analysis ◽  
Tree Analysis ◽  
Overhead Lines ◽  
Qualitative And Quantitative

The transmission line is an important part of the power system, its reliability will directly affect the reliability of the power system. The reliability of the overhead line plays a crucial role for the power system reliability. This paper analyze the reasons of the falling of the overhead lines, establish a fault tree, and make qualitative and quantitative analysis of the fault tree.

Reliability and Fault Tree Analysis: Theoretical and Applied Aspects of System Reliability and Safety Assessment.

1977 ◽  
Vol 72 (358) ◽  
pp. 482 ◽  
Author(s):  
Robert G. Easterling ◽  
R. E. Barlow ◽  
J. B. Fussel ◽  
N. D. Singpurwalla
Keyword(s):  
System Reliability ◽  
Safety Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis

Fault Tree Analysis for Reliability Evaluation of an Advanced Complex Manufacturing System

2018 ◽  
Vol 17 (01) ◽  
pp. 107-118 ◽  
Author(s):  
Hamed Fazlollahtabar ◽  
Seyed Taghi Akhavan Niaki
Keyword(s):  
System Reliability ◽  
Material Handling ◽  
Manufacturing System ◽  
Block Diagram ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Reliability Evaluation ◽  
Industrial Robots ◽  
Tree Analysis ◽  
Minimal Paths

In this paper, minimal paths and cuts technique is developed to handle fault tree analysis (FTA) on the critical components of industrial robots. This analysis is integrated with the reliability block diagram (RBD) approach in order to investigate the robot system reliability. The model is implemented in a complex advanced manufacturing system having autonomous guided vehicles (AGVs) as material handling devices. FTA grants cause and effects and hierarchical properties to the model. On the other hand, RBD simplifies the complex system of the AGVs for reliability evaluation. The results show that due to the filtering of the paths in a manufacturing system for AGVs, the reliability is highly dependent on the mostly occupied paths by AGVs. The failure probability for the AGV is considered to follow the exponential probability distribution and thus the whole system reliability using minimal paths and cuts method is obtained 0.8741.

A Novel Fault Tree Analysis Theory

2013 ◽  
Vol 779-780 ◽  
pp. 1711-1714
Author(s):  
Yuan Liang Huang ◽  
Jia Qi Zhong
Keyword(s):  
Complex Systems ◽  
System Reliability ◽  
Logic Gate ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Analysis Theory ◽  
Software And Hardware ◽  
Grey Number

A novel fault tree analysis theory is introduced for the ambiguity in complex systems. In the theory, the frequency grey number, which can express the events subjective ambiguity and objective ambiguity, is introduced to express the degree and probability that the components go wrong, dynamic envelope is applied to score the relation among components, and a new logic gate, Grey-gate, is advanced for expressing the effect of system reliability when the components go wrong. Finally, the theory is applied to analyze the fault effect of the system with software and hardware.

scholarly journals The Computer Aided Fault Tree Modeling and Analysis of the Refrigerator Evaporator Failure

2014 ◽  
Vol 8 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Quanyu Yu ◽  
Jie Liu ◽  
Kangkang Zhang
Keyword(s):  
Qualitative Analysis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Analysis Procedure ◽  
Tree Analysis ◽  
Modeling And Analysis ◽  
Tree Modeling ◽  
Computer Aided ◽  
Analysis System

The paper analyzes the various factors that cause failure of refrigerator evaporator. The refrigerator evaporator failure spectrum is constructed through qualitative analysis of the fault tree system after building a corresponding fault tree system. There is an analysis procedure of fault tree system based on computer aided fault tree analysis system (CAFTA).

Reliability Simulation for Offshore Structures Based on Fault Tree Analysis

2018 ◽  
Author(s):  
Yongjin Guo ◽  
Hongdong Wang ◽  
Hong Yi
Keyword(s):  
Large Scale ◽  
Failure Time ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Simulation Method ◽  
Offshore Structures ◽  
Offshore Platforms ◽  
Repairable Systems ◽  
Electrical Power System ◽  
Tree Analysis

Offshore structures are large-scale and multifunctional products with high requirements for reliability. In this paper, the reliability simulation method based on fault tree analysis for offshore structures is studied. For non-repairable systems, the Weibull distribution is used to fit the failure distribution function of the bottom events of fault trees. The Monte Carlo method is used to sample the lifetime of bottom events, and the unreliability of the top event is calculated through the structure function of the fault tree. For repairable systems, the time arrays of state changes are generated through sampling failure and maintenance time of the components. The system failure time of each simulation is calculated based on minimal cut sets of the fault tree. The method is applied in the reliability analysis of the electrical power system of offshore platforms to prove its feasibility and effectiveness.

Dynamic fault tree analysis of auxiliary feedwater system in a pressurized water reactor

Kerntechnik ◽  
2021 ◽  
Vol 86 (2) ◽  
pp. 164-172
Author(s):  
R. A. Fahmy ◽  
R. I. Gomaa
Keyword(s):  
Power Plant ◽  
System Reliability ◽  
Nuclear Power ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Cost Effective ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Tree Analysis ◽  
Dynamic Fault Tree

Abstract The safe and secure designs of any nuclear power plant together with its cost-effective operation without accidents are leading the future of nuclear energy. As a result, the Reliability, Availability, Maintainability, and Safety analysis of NPP systems is the main concern for the nuclear industry. But the ability to assure that the safety-related system, structure, and components could meet the safety functions in different events to prevent the reactor core damage requires new reliability analysis methods and techniques. The Fault Tree Analysis (FTA) is one of the most widely used logic and probabilistic techniques in system reliability assessment nowadays. The Dynamic fault tree technique extends the conventional static fault tree (SFT) by considering the time requirements to model and evaluate the nuclear power plant safety systems. Thus this paper focuses on developing a new Dynamic Fault Tree for the Auxiliary Feed-water System (AFWS) in a pressurized water reactor. The proposed dynamic model achieves a more realistic and accurate representation of the AFWS safety analysis by illustrating the complex failure mechanisms including interrelated dependencies and Common Cause Failure (CCF). A Simulation tool is used to simulate the proposed dynamic fault tree model of the AFWS for the quantitative analysis. The more realistic results are useful to establish reliability cantered maintenance program in which the maintenance requirements are determined based on the achievement of system reliability goals in the most cost-effective manner.

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