Fault tree construction method based on relational database

Abstract

The invention discloses a fault tree construction method based on a relational database. The method comprises the steps of step 1, establishing a product information relational database; step 2, selecting out target products; step 3, acquiring first failure modes of the target products as top events; step 4, selecting out target top events; step 5, screening failure modes which cause the target top events from failure modes of products in the same layer and the next layer of the target products as bottom events; step 6, associating with the bottom events to form a failure cause, and recordingthe failure cause; step 7, if all the top events are selected, executing step 8, otherwise, executing step 4; step 8, if the products are all selected, executing step 9, otherwise, executing step 2; step 9, ending. The method avoids the dependence on the capability of a product designer, a fault tree is continuously updated and perfected with the product development process, and the fault tree construction is accurate and fast and has high reliability and the like.

Description

technical field [0001] The present invention relates to the field of fault tree technology, more specifically, the present invention is a method for constructing a fault tree based on a relational database. Background technique [0002] Relational database is currently the most mature and widely used database system. It represents various information and their associated relationships through data structure to achieve efficient organization and management of data. It is the core of various contemporary computer information systems. [0003] Fault Tree (FT for short) is a behavior model based on the structure, functional characteristics and fault information of the research object. A special inverted tree-like logic diagram that uses logic gates to represent causality. [0004] Fault Tree Analysis (FTA for short) is the most important analysis method in safety system engineering. Graphically show the interaction between fault events and other events in the system, and intui...

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Problems solved by technology

[0007] In order to solve the problem that the existing fault tree construction method relies too much on product designers, the present invention innovatively proposes a fault tree construction method based on a relational database. Each product designer only needs to be familiar with the product structure and faults he is responsible for. Model information, after the product information relational database is established, a complete fault tree for any top event of any product can be generated, which effectively overcomes the problem that product designers must be very familiar with the entire product structure and fault modes to establish a fault tree, avoiding the need to At the same time, the analysis process of the entire product structure and failure mode effectively avoids the dependence on the experience and personal ability of product designers

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