Application of GO methodology in reliability analysis of aircraft flap hydraulic system

2019 ◽  
Vol 124 (1272) ◽  
pp. 257-270 ◽  
Author(s):  
J. Ma ◽  
F. Duan
Keyword(s):  
Complex Systems ◽  
Reliability Analysis ◽  
System Reliability ◽  
Hydraulic System ◽  
Feedback Loop ◽  
Fault Tree Analysis ◽  
Safety Evaluation ◽  
Go Model ◽  
Go Methodology ◽  
Civil Aircraft

ABSTRACTThe Goal-Oriented methodology (GO methodology) is an effective method for the reliability analysis of complex systems. It is especially suitable for the reliability analysis of multi-state complex systems containing the actual logistics, such as current, airflow and liquid flow. In order to solve the limitation that the GO methodology is not suitable for the reliability analysis of the system with feedback loop, the Boolean algebra idea is introduced to construct the Boolean operation formula of the feedback loop. In this paper, a certain type of civil aircraft flap hydraulic system with feedback loop is taken as the research object. According to the structural schematic diagram of the flap hydraulic system, the GO model of the flap hydraulic system is established. Next, the GO calculation is carried out to obtain the reliability of the flap hydraulic system. The comparison between the system reliability without feedback loop and that with feedback loop proves that the GO methodology with feedback loop is more accurate. The reliability of the system is analyzed by using the fault tree analysis (FTA) method, and the GO methodology with feedback loop is compared with the FTA method to verify the availability and correctness of the GO methodology in the reliability analysis and safety evaluation of aircraft flap hydraulic system.

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.

A New GO Methodology Algorithm Based on BDD

2013 ◽  
Vol 791-793 ◽  
pp. 1134-1138
Author(s):  
Jian Fan ◽  
Yi Ren ◽  
Lin Lin Liu
Keyword(s):  
System Reliability ◽  
Binary Decision Diagram ◽  
Analysis Procedure ◽  
Logic Tree ◽  
Minimal Path ◽  
Binary Decision ◽  
Go Model ◽  
Go Methodology ◽  
Minimal Path Sets

To solve the problems on quick achieving reliability and the minimal path sets (MPS) of a system with GO Methodology, a Binary Decision Diagram (BDD) based new GO methodology algorithm is introduced. This technique can avoid the shared signals and combination explosion problems simultaneously. Detailed steps with a case study are presented to explain the analysis procedure of this technique, firstly, establish the GO model and transform it into a directed acyclic diagram (DAG), logic tree and BDD successively; then minimize the BDD according to the Without Rule; at last, this system reliability and MPS can be achieved. The results of the studied case verify the validity and effectiveness of this algorithm.

Reliability Analysis for the Ignition System of Aviation Piston Engine in the GO Methodology

2014 ◽  
Vol 1044-1045 ◽  
pp. 375-379 ◽  
Author(s):  
Yan Feng
Keyword(s):  
Reliability Analysis ◽  
Success Probability ◽  
Signal Generator ◽  
Analysis Method ◽  
Piston Engine ◽  
Ignition System ◽  
Minimal Cut Sets ◽  
Go Model ◽  
Go Methodology ◽  
Quantification Analysis

Analyzing success probability of the ignition system of aviation piston engine based on GO methodology.Constructing the GO diagram of the ignition system of aviation piston engine and definites operational character types and fault rates.Using two quantification analysis methods without considering effects from the shared signal (signal generator 3),the success probabilities of the ignition system is 0.693. With considering effects from the shared signal (signal generator 3),the success probabilities of the ignition system is 0.707 by the corrected probability computing formula.so the effect from the shared signal should not be omitted.Using qualitative analysis method,the sum of the failure probability of minimal cut sets is0.780. After verification,the accuracy of reliability analysis for the ignition system using the corrected GO model with considering effects from shared signals is highest,and this GO model is applicable for reliabiliity analysis of the ignition system of aviation piston engine.

Reliability Analysis for Power Supply System in a Typical Reprocessing Facility Based on GO Methodology

2013 ◽  
Author(s):  
Renze Wang ◽  
Zongyang Feng ◽  
Pengbo Li
Keyword(s):  
Reliability Analysis ◽  
Power Supply ◽  
System Reliability ◽  
Power Supply System ◽  
Fault Tree ◽  
Supply System ◽  
Spent Fuel ◽  
System Reliability Analysis ◽  
Go Methodology ◽  
Operation Stability

Since the nuclear energy industry in China has developed rapidly, the demand for spent fuel reprocessing is becoming more and more distinct. In a reprocessing facility, power supply system (PSS) is important for operation-stability and safety-guarantee of the whole facility. Therefore, the reliability of the PSS deserves in-depth investigation and analysis. Fault tree (FT) methodology is the most accustomed methodology for system-reliability analysis and it has been standardized and applied widely. GO methodology is another effective methodology for system-reliability analysis but it has not been applied widely. In this work, GO methodology was applied to analyze the reliability of the PSS in a typical reprocessing facility. First, for modeling expediently, based on the fact that tie breakers are set in the system, tie breaker operator was defined by myself. Then, GO methodology modeling and quantitative analysis were performed, minimal cut sets (MCSs) and average unavailability of the system were obtained. Finally, parallel analysis between GO methodology and fault tree methodology was also performed. The results from the two methodologies are completely coincident. The results of this work show the following two points: 1. Setup of tie breakers in the PSS of the reprocessing facility is rational and necessary; 2. For reliability analysis of the PSS of the reprocessing facility, parallel with fault tree methodology, GO methodology has two distinct advantages: Its modeling is much easier and its chart is much more succinct.

Hydraulic System Reliability Analysis of Slurry Transportation Based on Stochastic Failure Petri Net

2014 ◽  
Vol 644-650 ◽  
pp. 832-835
Author(s):  
Dong Dong Wang ◽  
Lu Xi Liu ◽  
Ping Sun
Keyword(s):  
Reliability Analysis ◽  
Transport System ◽  
Petri Net ◽  
Dynamic Systems ◽  
System Reliability ◽  
Hydraulic System ◽  
Transportation System ◽  
Pipeline Transport ◽  
Pipeline Transportation ◽  
System Complexity

As the development of the slurry pipeline transportation system complexity and intelligent,it is more difficult to establish the reliability of the system.This pape take advantage of the descriptions of dynamic systems of stochastic failure petri net,applying in the field of slurry pipeline transport system reliability analysis.At same time,with the combination of Markov theory, it established the model of the hydraulic system reliability analysis.The feasibility and availability of the method is proved through an example of hydraulic system of slurry pipeline transportation.

Engineering Machinery Engine System Reliability Analysis

2010 ◽  
Vol 139-141 ◽  
pp. 2587-2590 ◽  
Author(s):  
Xiao Nan Zhang ◽  
An Xin Liu ◽  
Qing Zhen Gao ◽  
Xing Qing ◽  
Xing Chang
Keyword(s):  
Reliability Analysis ◽  
System Reliability ◽  
Fuzzy Theory ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Fuzzy Mathematics ◽  
Tree Analysis ◽  
Significance Analysis ◽  
Mathematics Method ◽  
Failure Character

It exists in complexity and fuzziness in structure and failure character of engineering machinery complex system. To solve the problem, fuzzy theory was introduced into fault tree analysis, and then the steps, principles and methods of fuzzy fault tree are determined. Based on the analysis of engineering machinery typical engine systemic structure and fault criterion, a fuzzy fault tree is established. Used a fuzzy mathematics method of reliability analysis with fuzzy fault rate and the median method of fuzzy significance analysis, the fuzzy fault rate and fuzzy significance of parts and subsystems is calculated. The result indicates that this method can solve the fuzziness problem of failure criterion and data in fault tree analysis. The result provides valuable reference for the reliability analysis.

scholarly journals Reliability Analysis of Special Vehicle Critical System Using Discrete-Time Bayesian Network

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Zong-Yuan Li ◽  
Guang-Jun Jiang ◽  
Hong-Xia Chen ◽  
Hai-Bin Li ◽  
Hong-Hua Sun
Keyword(s):  
Reliability Analysis ◽  
System Reliability ◽  
Reliability Assessment ◽  
Fault Tree Analysis ◽  
Critical Systems ◽  
Critical System ◽  
Fault Trees ◽  
Tree Analysis ◽  
Calculation Results ◽  
Special Vehicle

The reliability assessment of special vehicles has become very important. However, due to the special structure of special vehicles, it is difficult to collect a large amount of experimental data. The use of traditional fault tree analysis cannot accurately assess product reliability. In this paper, dynamic fault trees are used to model the critical systems of special vehicles, and discrete Bayesian networks are used to evaluate the reliability of critical systems of special vehicles, which solved the problems of difficulty in accurately describing complex systems in the process of system reliability analysis and difficulty in obtaining accurate data in the process of analysis. Finally, through the combination of expert experience and the evaluation of the calculation results, the rationality of the method used in this paper in the reliability evaluation of special vehicles is verified.

System Reliability Analysis for a Conveying Pipeline with GO Methodology

2014 ◽  
Vol 889-890 ◽  
pp. 1375-1378
Author(s):  
En Liu ◽  
Sheng Wan Yuan ◽  
Gang Wei Cui ◽  
Kai Zeng ◽  
Xiao Cong He ◽  
...  
Keyword(s):  
Reliability Analysis ◽  
System Reliability ◽  
Theoretical Basis ◽  
Structure And Function ◽  
System Optimum ◽  
Reliability Parameters ◽  
System Reliability Analysis ◽  
Go Methodology ◽  
And Function ◽  
Conveying System

The process of system reliability analysis for a conveying system with GO methodology was presented. The reliability criterion for a parallel conveying system was defined, regarding to its specific structure and function. Some new GO operators were defined and their algorithms were derived, considering system reparability. The system GO chart was established based on system diagram. Some important reliability parameters for steady system, such as availability and MTBF can be directly calculated with the GO calculation. The result shows that the proposed process is effective for the reliability analysis of this type conveying system and can provide a theoretical basis for the program decision and repairable system optimum design.

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