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Efficient evaluation method for reliability of complex system based on binary decision diagram

A binary decision diagram, reliability technology, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc.

Pending Publication Date: 2022-07-01
BEIHANG UNIV
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Problems solved by technology

The purpose and the problem to be solved are: to improve the modeling ability and calculation efficiency of the reliability block diagram model of large-scale complex systems

Method used

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  • Efficient evaluation method for reliability of complex system based on binary decision diagram
  • Efficient evaluation method for reliability of complex system based on binary decision diagram
  • Efficient evaluation method for reliability of complex system based on binary decision diagram

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Embodiment Construction

[0055] Description of the implementation: A method for efficiently solving the reliability block diagram model based on the structure identification method and the binary decision diagram model is provided. The complete process of the method is as follows: Figure 5 As shown, the specific implementation is described as follows:

[0056] The first part: Reliability block diagram model structure identification.

[0057] The reliability block diagram model of the complex system is shown in 6, and the reliability of the unit is 0.9. Node X3 is represented as a union model, and the weight is shown by the value on the connection line. Node X4 is represented as a model with 2 out of 3. The structure recognition process of the model is as follows:

[0058] Step 1: Initialize the current position node P as X5, and initialize the empty list list={};

[0059] Step 2: P is X5, its precursor node is X4, go to step 4;

[0060] Step 4: If the precursor node of P is only X4, go to Step 6; ...

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Abstract

The invention provides a method for efficiently solving a reliability block diagram model based on a structure identification method and a binary decision diagram model. The method aims at improving the modeling capability and the calculation efficiency of the reliability block diagram model of the large-scale complex system. The method comprises the following steps: firstly, identifying basic structures in a reliability block diagram model, such as series connection, parallel connection, voting and sum connection, replacing the basic structures with a complex unit, recursively calling the method, and finally forming a simple reliability block diagram model with a hierarchical structure; secondly, traversing the hierarchical reliability block diagram model from top to bottom until the modules at the bottommost layer, converting the modules into corresponding binary decision diagram models according to the structure types, and performing upward backtracking and layer-by-layer conversion to finally form a hierarchical binary decision diagram model; and finally, evaluating the reliability level of the complex system according to the constructed binary decision diagram model.

Description

[0001] Technical field [0002] The invention provides an efficient solution method for the reliability block diagram of a large-scale complex system. It is suitable for reliability assessment of complex systems. The invention belongs to the technical field of system reliability evaluation. Background technique [0003] Reliability block diagram is a commonly used method for modeling system reliability, which is widely used in aviation, aerospace, marine and many other fields. The structure of the reliability block diagram model consists of series, parallel, voting, and combination. In addition, the original reliability block diagram model was extended in GJB813-1900, and a model representing the task reliability of the multi-functional system was proposed. The reliability block diagram model represented the logical relationship between the system and the components. Therefore, in the After the reliability of the components is obtained, the reliability of the system can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02
CPCG06F30/20G06F2119/02
Inventor 任羿平雅诗李志峰杨德真孙博冯强王自力
Owner BEIHANG UNIV
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