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A Fault Tree Model Automatic Generation Method Based on Unified Model

An automatic generation and fault tree technology, which is applied in the fields of instrumentation, design optimization/simulation, electrical digital data processing, etc., can solve the problems of low efficiency, error-prone, and poor modeling consistency of manual establishment of fault tree models

Active Publication Date: 2022-06-28
BEIHANG UNIV
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Problems solved by technology

To establish a fault tree model, it is necessary to clarify the system function and operating principle, and use the fault tree model analysis method to carry out manual modeling. This manual modeling method not only has the shortcomings of relying heavily on the experience and ability of analysts, but also poor consistency in modeling by different personnel. , at the same time, for complex systems, manually building a fault tree model is inefficient and extremely error-prone

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  • A Fault Tree Model Automatic Generation Method Based on Unified Model
  • A Fault Tree Model Automatic Generation Method Based on Unified Model
  • A Fault Tree Model Automatic Generation Method Based on Unified Model

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Embodiment Construction

[0077] The present invention is a method for automatically generating a fault tree model based on a unified model. The flow chart of the implementation steps is as follows: figure 1 shown.

[0078] Step 1: Define a unified model of function and reliability that fuses expression functions and reliability characteristics, and clarify the formal expression of the meta-model, denoted as M={S,P,I,E,T,C,Su,L,Tr};

[0079] 1. Define the meta model of the unified model of function and reliability. It is a 9-tuple, denoted as M={S,P,I,E,T,C,Su,L,Tr}, each element in the tuple is specific Defined as follows:

[0080] 1) S(State): State, generally representing the state of the functional unit itself, corresponding to the concept of state space, that is, the enumeration of all possible functional states of the functional unit;

[0081] 2) P(In Port / Out Port): the input / output variables of the meta-model, where the input variable P I The state space of is determined by the output of the...

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Abstract

A method for automatically generating a fault tree model based on a unified model includes the following steps: (1) Define a unified model that integrates expression functions and reliability characteristics, and clarifies the formal expression of meta-model elements and connections between meta-models and dynamic trigger relationships. The elements contained in the model include state, input / output variables, initial values ​​of variables, events, transitions, logic, subunits, static connections, and dynamic triggers; (2) According to the logical judgment process of the fault tree model based on logical constraints, the state variables are judged (3) The unified model of function and reliability and static fault tree model events, "and", "or", "K out of N" logic gates are correspondingly transformed into the top event and middle event of the fault tree model Events, bottom events, and logic gates; (4) A complete process algorithm for automatically generating a static fault tree model from the connection relationship of the unified model of function and reliability is given, and a fault tree model based on the unified model of function and reliability is automatically generated.

Description

(1) Technical field [0001] The invention provides an automatic generation method for a fault tree model based on a unified model, which aims to establish a unified model that integrates the expression of functions and reliability characteristics by defining a unified model of function and reliability, and provides the unified model and static faults. Tree model events, transformation rules and transformation algorithms of static logic gates, and then automatically generate static fault tree models to improve reliability modeling work efficiency. The invention belongs to the field of reliability engineering. (2) Background technology [0002] As one of the most representative basic reliability models, the fault tree model is a typical binary logic basic model. It is an important output of reliability and safety design and analysis work, and is an indispensable part of product reliability design and analysis work. missing link. The starting point of the fault tree model anal...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/02
CPCG06F30/20G06F2119/02
Inventor 王自力任羿杨德真李志峰冯强孙博
Owner BEIHANG UNIV