Automated Fault Tree Analysis for Hydraulic Systems

1996 ◽  
Vol 118 (2) ◽  
pp. 278-282 ◽  
Author(s):  
P. A. Hogan ◽  
C. R. Burrows ◽  
K. A. Edge ◽  
R. M. Atkinson ◽  
M. R. Montakhab ◽  
...  
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Design Stage ◽  
Engineering Systems ◽  
Hydraulic Systems ◽  
Tree Analysis ◽  
Qualitative Component ◽  
Analysis Of Failures ◽  
And Performance ◽  
Component Models

Fault Tree Analysis is a commonly used technique for assessing the reliability and safety of engineering systems at the design stage but it is tedious and time-consuming to apply. A reconfigurable program is presented which utilizes a library of qualitative component models to enable fault tree type analyses of arbitrary hydraulic circuit configurations. It is applied to the analysis of failures of an experimental rig and a complex industrial system, and some features of its design and performance are discussed.

scholarly journals Reliability of sequential systems using the cause—consequence diagram method

2001 ◽  
Vol 215 (3) ◽  
pp. 207-220
Author(s):  
J D Andrews ◽  
L M Ridley
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Alternative Methods ◽  
Design Stage ◽  
Diagram Method ◽  
Tree Analysis ◽  
Industrial Systems ◽  
Analysis Methodology ◽  
Complete Set ◽  
Large Systems

In many industrial systems, where safety is of the utmost importance, it is necessary that expedient tools for accident analysis are available and employed at the design stage. Such tools must be able to handle large systems in a systematic way and display the factors that are of vital importance for the functionality of the system. The technique of fault tree analysis (FTA) is commonly used to assess the failure probability of such systems. The fault tree represents the failure logic of the system in an inverted tree structure and has the advantage that it provides very good documentation of the way the failure logic was developed. Conventional fault tree quantification requires a number of assumptions regarding the system. One of these is that the basic events in the tree occur independently. This condition is not satisfied when sequential failures are encountered. Employing alternative methods, such as Markov methods, can result in the loss of the documentation that represents the failure logic of the system. The cause-consequence diagram method is a tool that, like fault tree analysis, documents the failure logic but has the extra capability enabling the analysis of systems subject to sequential failures. In addition, the cause-consequence diagram identifies the complete set of system responses to any given initiating event. This paper is concerned with the cause-consequence diagram method and its application to sequentially operating systems. It extends previous work by providing more rigorous guidelines to enable the construction of the diagram and an analysis methodology that can be used when dependencies exist between the events featured in the decision boxes. A new symbol distinguishing between events that exist at a specified point in time and those that occur at that time is introduced to facilitate the analysis.

A collaborative modelling of ship and port interface operations under uncertainty

2016 ◽  
Vol 231 (1) ◽  
pp. 165-176 ◽  
Author(s):  
Andrew John ◽  
Thaddeus C Nwaoha ◽  
Tarnue M Kpangbala
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Engineering Systems ◽  
Analysis Method ◽  
Tree Analysis ◽  
Performance Effectiveness ◽  
Failure Data ◽  
Analysis Process ◽  
Fuzzy Fault Tree Analysis ◽  
Maritime Operations

Fault tree analysis is a known methodology used for analysing engineering systems. The approach is usually conducted using known failure data. Given that most maritime operations are conducted in a challenging and uncertain environment, their failure data are usually unavailable requiring a flexible and yet robust algorithm for the analysis of the systems. This research therefore seeks to analyse hazards of ships during ship and port interface operations as a result of manoeuvring by incorporating fuzzy fault tree analysis method to optimise the performance effectiveness of the system. Fuzzy set theory provides the needed flexibility to represent vague information from the analysis process. The methodology is structured in such a manner that diverse sets of data can be integrated and synthesised for analysing the system. It is envisaged that the proposed method could avail safety specialist with a simple and a step-by-step framework for evaluating maritime hazards in seaport operations in a concise way.

Fault Tree Analysis for a Modern Communication System

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kamal Hamid ◽  
Nadim Chahine
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Theory And Practice ◽  
Tree Analysis ◽  
Satisfactory Performance ◽  
System Components ◽  
Link Budget ◽  
Simulation Results

Wireless communications became one of the most widespread means for transferring information. Speed and reliability in transferring the piece of information are considered one of the most important requirements in communication systems in general. Moreover, Quality and reliability in any system are considered the most important criterion of the efficiency of this system in doing the task it is designed to do and its ability for satisfactory performance for a certain period of time, Therefore, we need fault tree analysis in these systems in order to determine how to detect an error or defect when happening in communication system and what are the possibilities that make this error happens. This research deals with studying TETRA system components, studying the physical layer in theory and practice, as well as studying fault tree analysis in this system, and later benefit from this study in proposing improvements to the structure of the system, which led to improve gain in Link Budget. A simulation and test have been done using MATLAB, where simulation results have shown that the built fault tree is able to detect the system’s work by 82.4%.

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