Dynamic reliability evaluation method and device considering multi-dimensional coupling degradation process

A technology of reliability and evolution process, applied in design optimization/simulation, complex mathematical operations, geometric CAD, etc., can solve problems that are difficult to give physical explanations

Active Publication Date: 2021-05-25
质维科技(珠海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods are based on data-driven methods to calculate the correlation between the degradation processes, and it is difficult to give a reasonable physical explanation

Method used

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  • Dynamic reliability evaluation method and device considering multi-dimensional coupling degradation process
  • Dynamic reliability evaluation method and device considering multi-dimensional coupling degradation process
  • Dynamic reliability evaluation method and device considering multi-dimensional coupling degradation process

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Embodiment Construction

[0138] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0139] It should be noted that the terms "include" and "have" and any variations thereof in the embodiments of the present invention and drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these pr...

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Abstract

The invention discloses a dynamic reliability evaluation method and device considering a multi-dimensional coupling degradation process, and the method comprises: considering the interaction influence of the wear and fatigue of a surface material of an equipment system; dividing the dynamic evolution process of the equipment system into the following five states: a wear and crack initiation state, a wear and small crack propagation state, a wear and long crack propagation state, a wear and crack-free state and a failure state; representing the evolution process of the equipment system: da<t> / dt=F(a<t>, X<t>) by utilizing the following statistical evolution processes; according to models of a function F(.) in various states, further representing the statistical evolution process shown in the description, enabling a mathematical expression of the system degradation amount at a given moment T to be shown in the description; fitting parameters in a deterministic function, a state transition probability matrix and a state space of a Markov process are estimated; and calculating the reliability of the equipment system through a Monte Carlo method based on the estimated parameters.

Description

technical field [0001] The invention relates to the field of technical industrial engineering, in particular to a dynamic reliability evaluation method and device considering multi-dimensional coupling degradation process. Background technique [0002] With the integration of construction machinery and equipment and the complexity of its operating environment, the reliability of equipment systems is affected by factors such as multiple failure modes and nonlinear operating conditions. System failure is not caused by a single failure mode, but the result of coupling and competition between multidimensional degradation processes. The coupling relationship between multidimensional degradation processes has a significant impact on the safe operation of the equipment system and the prediction of the remaining useful life of the system. Quantitative research on the dynamic evolution process of the multidimensional degradation process can realize the system dynamic reliability ass...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/20G06F17/16G06F17/15G06F119/04
CPCG06F30/17G06F30/20G06F17/16G06F17/15G06F2119/04
Inventor 李彦夫姜珊
Owner 质维科技(珠海)有限公司
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