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Failure mechanism damage accumulation model-based load sharing behavior modeling and simulating method

A technology of fault mechanism and simulation method, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as the inability to effectively evaluate the k/n system load history, and achieve accuracy, high efficiency and reliability Effect

Active Publication Date: 2018-06-01
BEIHANG UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing modeling method cannot effectively evaluate the complex load history of the k / n system with the load sharing effect. The change of load and the development rate of the failure mechanism, as well as the accumulation of damage caused by the failure mechanism at different stages, make the description of the failure behavior of the k / n system clearer, and can calculate k / n more efficiently and accurately n system reliability

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  • Failure mechanism damage accumulation model-based load sharing behavior modeling and simulating method
  • Failure mechanism damage accumulation model-based load sharing behavior modeling and simulating method
  • Failure mechanism damage accumulation model-based load sharing behavior modeling and simulating method

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[0080] Exemplary embodiments, features, and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0081] The present invention provides a load sharing behavior modeling and simulation method based on fault mechanism damage accumulation model, which includes the following steps:

[0082] Step 1: Jointly use function-related gates and fault mechanism promotion gates to model load distribution logic, and establish a general fault mechanism accumulation model; Figure 2a and Figure 2b Logic diagram for the load sharing effect using FDEP gates and MACC gates.

[0083] Step 2: Establish a continuous degradation fault mechanism cumulative model, Figure 3a-Figure 3b is the load and dama...

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Abstract

The invention provides a failure mechanism damage accumulation model-based load sharing behavior modeling and simulating method. The method comprises the following steps of: 1, carrying out load distribution logic modeling by jointly using a function related gate and a failure mechanism promotion gate so as to establish a universal failure mechanism accumulation model; 2, establishing a continuousinvolution type failure mechanism accumulation model; 3, establishing a composite impact evolution type failure mechanism accumulation model; 4, establishing an overstress type failure mechanism accumulation model; 5, modeling a system by utilizing a binary decision graph and a failure mechanism tree; and 6, carrying out reliability simulation on the mechanism models and the system model by utilizing a Matlab, and obtaining damage amount curves of parts and reliability curves of subsystems and the system. According to the method, modeling is carried out from the angle of damage amount, and the modeling method is capable of calculating the reliability of systems more correctly and efficiently, so that a new thought is provided for researching the reliability of k / n systems.

Description

technical field [0001] The invention belongs to the field of product reliability modeling and simulation, and in particular relates to a k / n system failure behavior modeling and simulation method considering the load sharing effect. Background technique [0002] In the field of reliability engineering, it is a common practice to use redundancy to improve system reliability, and the k / n system is one of them. When analyzing the reliability of redundant systems, it is often assumed that the system components are independent of each other. However, in practical systems, the correlation of failures will increase the joint failure probability of the system and reduce the reliability of the whole system, so more and more attention is focused on improving the failure prediction model. Load sharing means that all components in the system share the load. When a component fails, the total load is redistributed among the remaining components. In reality there are many load sharing sy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 陈颖俞晓勇李颖异康锐
Owner BEIHANG UNIV
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