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Backup structure-oriented fault tree analysis method

A technology for fault tree analysis and backup structure, which is used in instruments, character and pattern recognition, computer parts, etc.

Inactive Publication Date: 2012-09-12
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The purpose of the present invention is in order to solve the above-mentioned problem that existing fault tree analysis method exists, has proposed a kind of fault tree analysis method facing backup structure

Method used

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  • Backup structure-oriented fault tree analysis method
  • Backup structure-oriented fault tree analysis method
  • Backup structure-oriented fault tree analysis method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] Such as figure 1 As shown, the fault tree analysis method of the present invention comprises the steps: construct its dynamic fault tree model according to the working principle and failure process of the backup structure; convert to fuzzy Markov model; obtain its corresponding Kolmogorov state transition differential equations according to the fuzzy Markov model; Solve the obtained Kolmogorov state transition differential equations.

[0044] The dynamic fault tree model is specifically a backup gate, and the structure diagram is as follows figure 2 As shown, it includes a main part, multiple spare parts, and an output terminal. The main part is in the working state at the beginning, and multiple spare parts are in the backup state; when the main part fails, the available spare parts will be switched to the working state. Until the ba...

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Abstract

The invention discloses a backup structure-oriented fault tree analysis method, wherein a dynamic fault tree model is built based on working principles and failure processes of a backup structure, and the failure process of the backup structure is transformed to a fuzzy Markov model; Kolmogorov state transfer differential equations corresponding to the fuzzy Markov model are built and solved, so as to obtain fuzzy state probabilities of the backup structure at any time point. The invention efficiently resolves the problems of "small sample" and "inaccuracy" in fault tree analysis processes, and dynamic characteristic and sequential characteristic of the backup structure and the problem of imperfect coverage of backup switching are also considered, thereby a relatively accurate reliability quantitative analysis result is obtained, which helps to find the weak link affecting the reliability of the system and provides a guidance in optimizing design of the system.

Description

technical field [0001] The invention belongs to the field of reliability analysis of electromechanical systems, and in particular relates to a dynamic fault tree analysis method. Background technique [0002] Reliability analysis has been widely used in various engineering fields. The aviation industry is a highly sophisticated and comprehensive industry. Some aviation products will be related to the life safety of pilots and passengers, while some aviation products will be related to the success or failure of the entire war situation. Therefore, reliability engineering is particularly important for the aviation industry. The reliability engineering of aviation products mainly studies reliability analysis, evaluation, and technical measures to ensure and improve product reliability. In the development stage of UAV, its reliability problem is particularly prominent. On the one hand, low reliability will lead to the loss of detection and combat capabilities of UAVs and even c...

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Application Information

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IPC IPC(8): G06K9/62
Inventor 黄洪钟李彦锋孙健李海庆刘宇凌丹孙锐
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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