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Complex product reliability evaluation method based on similar life model and similar life

A complex product and reliability technology, which is applied in the field of reliability evaluation of complex products based on similar life models and similar life, can solve problems such as complex product reliability evaluation, and achieve the effect of solving complex calculations, poor scalability, and clear calculation steps

Pending Publication Date: 2020-05-08
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0010] Based on this, it is necessary to address the above technical problems and provide a complex product reliability evaluation method based on similar life models and similar life that can solve the complex problem of reliability evaluation of newly developed products.

Method used

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  • Complex product reliability evaluation method based on similar life model and similar life
  • Complex product reliability evaluation method based on similar life model and similar life
  • Complex product reliability evaluation method based on similar life model and similar life

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Embodiment Construction

[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0058] In one embodiment, such as figure 1 As shown, a complex product reliability assessment method based on similar life model and similar life is provided, including the following steps:

[0059] Step 102, obtain the similarity between the newly developed product and similar products, and determine the similarity factor according to the similarity.

[0060] Product similarity refers to the closer the function, working environment, working parameters, working hours, etc., the higher the similarity between the two. The similarity factor is obtained by combining the simil...

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Abstract

The invention relates to complex product reliability evaluation based on a similar life model and similar life. The method comprises the following steps of: obtaining the similarity between the newlyresearched and developed product and the similar product; determining a similarity factor according to the similarity; according to the fact that the service life of similar products obeys shape parameters and scale parameters of Weibull and corresponding similarity factors, constructing a similar life model corresponding to the similar product; then, using the obtained life test data of the similar products to onstruct a joint likelihood function, and setting initial values of model parameters in the similar life model, solving parameter estimation values of the model parameters in the similar life model through a related numerical optimization algorithm and the likelihood function, and finally obtaining a reliability function of the newly researched and developed product according to theparameter estimation values, the similarity factor of the newly researched and developed product and the similar life model. By adopting the method, the reliability evaluation efficiency of complex products can be improved.

Description

technical field [0001] The present application relates to the technical field of reliability assessment, in particular to a reliability assessment method for complex products based on a similar life model and a similar life. Background technique [0002] Reliability refers to the ability of a product to complete specified functions under specified conditions and within specified time. Reliability is an inherent attribute of a product and an important indicator to measure the quality of a product. Therefore, it is very important to study the reliability of a product. The evaluation of reliability is an important part of the research. The specific indicators for evaluation include reliability, life and remaining life, etc. . [0003] The reliability of the product is closely related to failure, so the life of the product is a random variable. The existing reliability evaluation theory often assumes or verifies that the product life obeys a certain distribution, and then uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02G06F111/08G06F111/10
Inventor 贾祥程志君王昊冉
Owner NAT UNIV OF DEFENSE TECH
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