scholarly journals Editorial for the Special Issue on “Fault Trees and Attack Trees: Extensions, Solution Methods, and Applications”

Information ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 175
Author(s):  
Daniele Codetta-Raiteri
Keyword(s):  
Reliability Analysis ◽  
Failure Probability ◽  
System Failure ◽  
Special Issue ◽  
Fault Trees ◽  
Qualitative And Quantitative ◽  
Minimal Cut Sets ◽  
Minimal Cut ◽  
Attack Trees ◽  
Solution Methods

Fault Trees are well-known models for the reliability analysis of systems, used to compute several kinds of qualitative and quantitative measures, such as minimal cut-sets, system failure probability, sensitivity (importance) indices, etc [...]

Fault Tree Approach for the Reliability Analysis of Gear Trains: Part I — Basic Theory

1987 ◽  
Author(s):  
T. S. Pan ◽  
S. S. Rao
Keyword(s):  
Fault Tree ◽  
Gear Train ◽  
System Failure ◽  
Fault Trees ◽  
Minimal Cut Sets ◽  
Logic Diagram ◽  
Epicyclic Gear ◽  
Total Failure ◽  
Gear Trains ◽  
Tree Approach

Abstract The application of fault tree techniques to the analysis of gear trains is considered. The techniques involve the decomposition of the system into a logic diagram or fault tree in which certain basic or primary events lead to a specified top event which signifies the total failure of the system. The fault trees are used to obtain minimal cut sets from which the modes of system failure and, hence, the reliability measure for the top event can be calculated. The method of constructing fault trees and the subsequent estimation of reliability of the system is illustrated through a nine speed compound gear train and a five speed epicyclic gear train.

scholarly journals A Hierarchical Approach for Fast Calculating Minimal Cut Sets of a Microgrid

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Yanbo Che ◽  
Yuancheng Zhao ◽  
Jianmei Xu ◽  
Jinhuan Zhou
Keyword(s):  
Reliability Analysis ◽  
Analytical Techniques ◽  
Hierarchical Approach ◽  
Breadth First Search ◽  
Minimal Cut Sets ◽  
Minimal Cut ◽  
Electric Aircraft ◽  
Search Approach ◽  
Minimal Path Sets ◽  
More Electric Aircraft

Minimal cut sets are the basis of reliability analysis using analytical techniques. At the present stage, minimal cut sets are mainly obtained by dealing with minimal path sets, which involves cumbersome steps and slower operational speed. The speed of reliability analysis is limited by that of calculating minimal cut sets. In consideration of the characteristics of microgrid, a hierarchical approach for fast calculating minimal cut sets is proposed in this paper. Firstly, an equivalent principle is proposed to convert topology structure into network node diagram; then grades of nodes are designated based on their original connection and the breadth-first search approach; afterwards, root-leaf matrices and selected matrix are created to specify the direction and order of the search. Next, all possible combinations of minimal cut sets are vertically traversed out by replacing root nodes with leaf nodes to achieve a more rapid access to minimal cut sets. Finally, taking the electrical structure of type A380 more electric aircraft as an example, mainstream methods are compared to show the correctness and advantage of our proposed method.

Fault Tree Approach for the Reliability Analysis of Gear Trains

1988 ◽  
Vol 110 (3) ◽  
pp. 348-353 ◽  
Author(s):  
T. S. Pan ◽  
S. S. Rao
Keyword(s):  
Fault Tree ◽  
Gear Train ◽  
System Failure ◽  
Fault Trees ◽  
Minimal Cut Sets ◽  
Logic Diagram ◽  
Epicyclic Gear ◽  
Total Failure ◽  
Gear Trains ◽  
Tree Approach

The application of fault tree techniques to the analysis of gear trains is considered. The techniques involve the decomposition of the system into a logic diagram or fault tree in which certain basic or primary events lead to a specified top event which signifies the total failure of the system. The fault trees are used to obtain minimal cut sets from which the modes of system failure and, hence, the reliability measure for the top event can be calculated. The method of constructing fault trees and the subsequent estimation of reliability of the system is illustrated through a nine speed compound gear train and a five speed epicyclic gear train.

Efficient Construction of Minimal Cut Sets from Fault Trees

1977 ◽  
Vol R-26 (2) ◽  
pp. 88-94 ◽  
Author(s):  
S. Garribba ◽  
P. Mussio ◽  
F. Naldi ◽  
G. Reina ◽  
G. Volta
Keyword(s):  
Fault Trees ◽  
Minimal Cut Sets ◽  
Minimal Cut ◽  
Efficient Construction

Estimation of System Reliability by Monte Carlo Simulation

2009 ◽  
Author(s):  
A. Naess ◽  
B. J. Leira ◽  
O. Batsevych
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Reliability Analysis ◽  
Failure Probability ◽  
Failure Criterion ◽  
System Reliability ◽  
Substantial Reduction ◽  
Structural Systems ◽  
System Failure ◽  
Simulation Monte Carlo

A new method for estimating the reliability of structural systems is proposed. The method is based on the use of Monte Carlo simulation. Monte Carlo based methods for system reliability analysis has several attractive features, the most important being that the system failure criterion is usually relatively easy to check almost irrespective of the complexity of the system. The disadvantage of such methods is the amount of computational efforts that may be involved. However, by reformulating the reliability problem to depend on a parameter and exploiting the regularity of the failure probability as a function of this parameter, it is shown that a substantial reduction of the computational efforts involved can be obtained.

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