Research on static fault tree analysis method for inerting system safety based on random number generation
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 18 January 2023
Issue publication date: 14 February 2023
Abstract
Purpose
To reduce the flammability exposure assessment time and meet the requirements of airworthiness regulations of transport aircraft, inerting system has become the standard configuration of modern civil aircraft. Therefore, airworthiness regulations put forward definite quantitative index requirements for the safety of inerting system, and to obtain the quantitative data of the safety of inerting system, it is necessary to solve the calculation method. As one of the quantitative/qualitative evaluation techniques for system safety, fault tree analysis is recognized by international airworthiness organizations and national airworthiness certification agencies. When fault tree analysis technology is applied to quantitative analysis of the safety of inerted system, there are still some problems, such as heavy margin of constructing fault tree, great difficulty, high requirement for analysts and poor accuracy of solving when there are too many minimum cut sets. However, based on tens of thousands of flight simulation tests, Monte Carlo random number generation method can solve this problem.
Design/methodology/approach
In this paper, the fault tree of airborne inerting system is established, and the top event is airborne inerting system losing air separation function. Monte Carlo method based on random number generation is used to carry out system security analysis. The reliability of this method is verified.
Findings
The static fault tree analysis method based on Monte Carlo random number generation can not only solve the problem of quantitative analysis of inerting system, but can also avoid the defects of complicated solution and inaccurate solution caused by the large number of minimum cut sets, and its calculation results have good reliability.
Practical implications
The research results of this paper can be used as supporting evidence for airworthiness compliance of airborne inerting system.
Originality/value
The research results of this paper can provide practical guidance for the current civil airworthiness certification work.
Keywords
Acknowledgements
Civil Aviation Joint Foundation of Natural Natural Science Foundation of China U1933121.
Data availability: All data, models and code generated or used during the study appear in the submitted article.
Conflict of interest: The authors declare that they do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.
Citation
Zhang, R., Geng, L. and Liu, W. (2023), "Research on static fault tree analysis method for inerting system safety based on random number generation", Aircraft Engineering and Aerospace Technology, Vol. 95 No. 4, pp. 649-657. https://doi.org/10.1108/AEAT-02-2022-0057
Publisher
:Emerald Publishing Limited
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