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Multi-state system reliability assessment method based on edge value multi-valued decision diagram

A multi-state system, multi-value decision-making technology, applied in reliability/availability analysis, special data processing applications, instruments, etc., can solve problems such as limiting EVMDD application and complexity

Active Publication Date: 2019-09-20
BEIHANG UNIV
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Problems solved by technology

[0005] However, the current EVMDD model is converted from the MDD model, and it is still necessary to construct the MDD model in practical applications. The process of constructing the MDD model for a system with many nodes and many states will be particularly complicated, which also limits the application of EVMDD in actual engineering. Applications

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  • Multi-state system reliability assessment method based on edge value multi-valued decision diagram
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  • Multi-state system reliability assessment method based on edge value multi-valued decision diagram

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Embodiment Construction

[0054] Description of the implementation mode: A method for automatically learning the system reliability model and failure parameters based on the condition monitoring data of the system, subsystems and units, and evaluating the reliability of the system is provided. The specific implementation mode is described as follows:

[0055] The first part: According to the characteristics of the multi-state system, construct the structure function of the multi-state system.

[0056] By analyzing the different states contained in each unit of the system, the structure function of the whole multi-state system is obtained. The following will be explained with specific examples:

[0057] A multi-state k out of n system, a regional power and heating system composed of three combined heat and power units, which can generate electricity and heat at the same time, the system provides electricity and heat to the load. The system structure is attached Figure 4 shown. In this system, G1 is ...

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Abstract

The invention discloses a multi-state system reliability assessment method based on an edge value multi-valued decision diagram model. According to the method, the edge value multi-valued decision diagram model can be directly constructed without the reduction of the multi-valued decision diagram, the modeling process can be effectively simplified, the calculation time cost can be effectively reduced, and the method is suitable for the reliability evaluation of a complex multi-state system with multiple system nodes and multiple states. The method comprises the following steps of 1, constructing a system structure function according to a multi-state performance level of a system; 2, based on a system structure function, directly constructing the edge value multi-value decision diagram model of the system; 3, reducing the model scale by applying the simplified rules, and improving the calculation efficiency; and 4, carrying out reliability evaluation on the multi-state system according to the established edge value multi-value decision diagram model.

Description

[0001] Technical field [0002] The invention relates to the field of reliability evaluation of multi-state systems. Provides a construction method of Edge-Value Multiple-Valued Decision Diagrams (EVMDD) for multi-state system reliability evaluation, which does not require multiple-valued decision diagrams (Multiple-Valued Decision Diagrams , MDD) conversion can directly generate EVMDD model. It is suitable for the reliability evaluation of complex multi-state systems with many system nodes and many states. Background technique [0003] With the improvement of product reliability requirements in modern society, many systems increase the reliability level by increasing system unit backup, such as computer server systems, communication systems, water, gas and power distribution systems. For such a system, when a unit failure occurs, the system can still continue to work in an acceptable or degraded state, reflecting the characteristics of multiple performance states. Therefor...

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Application Information

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IPC IPC(8): G06F11/00G06F17/50
CPCG06F11/008G06F30/20
Inventor 任羿吕星李志峰杨德真冯强王自力
Owner BEIHANG UNIV
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