Reliability Analysis on Gearbox Transmission System of Agricultural Machinery Chassis Based on FTA

2013 ◽  
Vol 694-697 ◽  
pp. 876-882
Author(s):  
Li Xiang Zhang ◽  
Shou Rong Liu ◽  
Wei Long Li ◽  
Xin Jia Meng
Keyword(s):  
Weak Link ◽  
High Reliability ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Transmission System ◽  
Relative Probability ◽  
Minimal Cut Sets ◽  
Combine Harvester ◽  
And Function ◽  
And Control

Fault Tree Analysis (FTA) was used to analyze the reliability of gearbox transmission system of 4LZ-2 combine harvester (4LZ-2 CHGTS). Firstly, the structure and function of the 4LZ-2 CHGTS were made a detailed introduction, and the components were divided into three kinds of A, B and C. Secondly, the Fault Tree (FT) model of the 4LZ-2 CHGTS was estabilished using the "top to down" ideology. Finally, based on the FT, the minimal cut sets (MCSs) were given and the weak link of the system was found out by the qualitative analysis; furthermore, the relative probability importance of each basic event and the reliability of the 4LZ-2 CHGTS were analyzed by the quantitative analysis. The results show that the 4LZ-2 CHGTS is of high reliability, and the fault of gears needs to be taken into a key consideration and control in the design process of the GTS.

FTAe – Fault Tree Analysis in Microsoft Excel

2014 ◽  
Vol 889-890 ◽  
pp. 591-594
Author(s):  
Richard Kuracina ◽  
Denis Šandor ◽  
Karol Balog
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Software Tool ◽  
Short Description ◽  
Microsoft Excel ◽  
Tree Analysis ◽  
Minimal Cut Sets ◽  
Minimal Cut ◽  
Cut Set

FTAe is software tool for Fault Tree Analysis in Microsoft Excel. This paper is focused on short description of created FTAe. A brief description of Fault Tree Analysis is in the first part of paper. The Structure, Logic and Minimal Cut Sets in Fault Tree analysis is described too. Next part of this paper is focused on the choice of algorithm for cut set calculation and brief description of structure of FTAe. Finally, advantages of FTAe software in Microsoft Excel are described in conclusions.

Fault Tree Analysis of Vehicle Engine Lubricating Oil’s Failure

2013 ◽  
Vol 300-301 ◽  
pp. 172-175 ◽  
Author(s):  
Qi Long Han ◽  
Xin Gao
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Failure Detection ◽  
Lubricating Oil ◽  
Systematic Analysis ◽  
Minimal Cut Sets ◽  
Vehicle Engine ◽  
Oil Storage ◽  
Set Up ◽  
Algebra Method

Through a systematic analysis of various aspects during the process of vehicle engine lubricating oil storage, transportation and use, this paper set up vehicle engine lubricating oil failure fault tree which chose the failure of vehicle engine lubricating oil as the top event. Through the analysis of the fault tree, the minimal cut sets of fault trees were figured out based on the Boolean algebra method. Besides, the structure importance was analyzed, and thus the failure detection process was given and some preventive measures were recommended.

Fault Tree Analysis of “Mistakes, Forgetfulness, and Negligence” Accidents in ATC

2011 ◽  
Vol 63-64 ◽  
pp. 924-929 ◽  
Author(s):  
Ya Qing Chen ◽  
Shi Gang Li ◽  
Xin He
Keyword(s):  
Traffic Control ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Weak Sense ◽  
Flight Safety ◽  
Tree Analysis ◽  
Minimal Cut Sets ◽  
Safety Awareness ◽  
Main Factors ◽  
High Control

The "mistakes, forgetfulness, and negligence" accidents in Air Traffic Control (ATC) have a great impact on flight safety. On the basis of Fault Tree Analysis (FTA), the paper established the "mistakes, forgetfulness, and negligence" accidents in ATC fault tree, obtained all the minimal cut sets, and qualitatively analyzed the cause of accidents. According to survey data, the paper calculated the probability of the top event, as well as the probability importance degree coefficients and critical importance degree coefficients of basic events, and quantitatively analyzed the cause of accidents. The results show that the weak sense of responsibility, poor safety awareness, unsound rules and regulations, inadequate enforcement of rules and regulations, and high control office noise are the main factors leading to the accident. The paper provides ATC units with recommendations to establish solutions to "mistakes, forgetfulness, and negligence" accidents in ATC.

Research of the Node Ordering Technique According to the Shortest Fault Tree

2017 ◽  
Author(s):  
Guofeng Tang ◽  
Jingyu Zhang ◽  
Wei Gao ◽  
Qinfang Zhang
Keyword(s):  
Safety Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Binary Decision ◽  
Tree Analysis ◽  
Advanced Method ◽  
Probabilistic Safety Assessment ◽  
The Core ◽  
Minimal Cut Sets ◽  
Variable Ordering

Zero-suppressed Binary Decision Diagram (ZBDD) algorithm is an advanced method in fault tree analysis, which is developing quickly in recent years and being used in the development of the Probabilistic Safety Assessment (PSA) Quantification Engine. This algorithm converts a fault tree to a ZBDD structure, solves the minimal cut sets and calculates the top node unavailability. The ordering of the basic events and logical gates is the core technique of the ZBDD algorithm, which determines the efficiency of the ZBDD conversion and the size of the ZBDD structure. A variable ordering method based on the structure of the fault tree is developed in this paper, which gives a better basic events order by compressing the fault tree; meanwhile, the method offers a logical gates order. The nodes order derived from this method can accelerate the ZBDD conversion obviously.

Fault Tree Analysis of Vehicle Charging System

2012 ◽  
Vol 588-589 ◽  
pp. 401-406 ◽  
Author(s):  
Jian Wei Ma ◽  
Wan Jian Yin ◽  
Jin Gang Ma ◽  
Qing Shan Ji
Keyword(s):  
Theoretical Basis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Occurrence Probability ◽  
Analysis Method ◽  
Tree Model ◽  
Tree Analysis ◽  
Charging System ◽  
Vehicle Charging ◽  
And Function

The composition and function of vehicle charging system are analyzed, and basic theory of fault tree analysis method is introduced. The qualitative analysis of its reliability is carried out. Fault tree model of vehicle charging system is built, the minimum cut sets are solved and the key parts are found out. Through quantitative analysis, the occurrence probability of top event and importance of bottom event are solved, which provides theoretical basis for fault diagnoses of vehicle charging system, saves time of fault diagnoses and reduces unnecessary disassembly.

Fault Tree Analysis

2016 ◽  
Vol 32 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Lisa M. McElroy ◽  
Rebeca Khorzad ◽  
Theresa A. Rowe ◽  
Zachary A. Abecassis ◽  
Daniel W. Apley ◽  
...  
Keyword(s):  
High Reliability ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Quality Data ◽  
Improvement Program ◽  
Surgical Quality ◽  
Tree Analysis ◽  
Quality Reporting ◽  
National Quality ◽  
Reporting Programs

The purpose of this study was to use fault tree analysis to evaluate the adequacy of quality reporting programs in identifying root causes of postoperative bloodstream infection (BSI). A systematic review of the literature was used to construct a fault tree to evaluate 3 postoperative BSI reporting programs: National Surgical Quality Improvement Program (NSQIP), Centers for Medicare and Medicaid Services (CMS), and The Joint Commission (JC). The literature review revealed 699 eligible publications, 90 of which were used to create the fault tree containing 105 faults. A total of 14 identified faults are currently mandated for reporting to NSQIP, 5 to CMS, and 3 to JC; 2 or more programs require 4 identified faults. The fault tree identifies numerous contributing faults to postoperative BSI and reveals substantial variation in the requirements and ability of national quality data reporting programs to capture these potential faults. Efforts to prevent postoperative BSI require more comprehensive data collection to identify the root causes and develop high-reliability improvement strategies.

Identification and Control of Hazard in Underground Blasting

2014 ◽  
Vol 926-930 ◽  
pp. 4097-4100
Author(s):  
Dong Tao Hu
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Minimum Cut ◽  
Underground Blasting ◽  
Tree Analysis ◽  
Cut Set ◽  
And Control

To prevent underground blasting accidents, fault tree analysis (FTA), a method for identifying and evaluating hazard in safety theory, is used to throughly analyze underground blasting technology. With calculating the minimum cut set and path set, causes of blasting accidents are determined. And corresponding preventions are formulated.

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