PoF (physics of failure) based method for calculating mission reliability of electronic product

A technology of fault physics and calculation methods, which is applied in computing, sustainable transportation, electrical digital data processing, etc., and can solve problems such as the reliability of computing product tasks

Active Publication Date: 2014-02-05
BEIHANG UNIV
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  • PoF (physics of failure) based method for calculating mission reliability of electronic product
  • PoF (physics of failure) based method for calculating mission reliability of electronic product
  • PoF (physics of failure) based method for calculating mission reliability of electronic product

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Embodiment Construction

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0062] The following examples are as follows figure 1 The implementation of the flow shown mainly includes determining the temperature and vibration environment profile of each task of the electronic controller, using Flotherm to simulate the temperature stress of the software, using ANSYS software to simulate the distribution of vibration stress, stress damage analysis, damage accumulation analysis, and selection of fault physics. The model is simulated by Monte Carlo method to determine the main failure mechanism and time before failure of the electronic controller in each task, and to count the main failure mechanism of the electronic controller and calculate the average time before failure. Electronic controller hardware components such as figure 2 As shown, it includes chassis, power supply module, CPU module, power conversion module, s...

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Abstract

A PoF based method for calculating mission reliability of an electronic product comprises steps as follows: step one, information of all mission profiles of the product is collected, and an environment profile of each mission is determined; step two, thermal simulation and vibration simulation of environmental stress of each mission are performed, and a local response of the product to an environmental load is obtained; step three, a product simulation model is established; step four, simulation calculation of the product in all the mission profiles is completed, and the mean time to failure and a main failure mechanism of the product are obtained; and step five, the mission reliability of the product is calculated according to the mean time to failure. According to the PoF based method for calculating the mission reliability of the electronic product, all missions of the product during lifetime use are considered, the environmental stress of each mission is simulated, and the mean time to failure and the mission reliability of the product are comprehensively calculated. By means of a PoF model, the direction relation between parameters of a product material, structure, process and the like and the reliability can be obtained, and a design improvement direction is clearly and directly provided for the product.

Description

technical field [0001] The invention provides a method for calculating the reliability of electronic tasks based on fault physics, in particular to a method for calculating the reliability of multi-task electronic products based on fault physics, which belongs to the field of product reliability prediction. Background technique [0002] With the rapid development of science and technology, the complexity of electronic products continues to increase. For electronic products with high reliability requirements, being able to analyze and quantitatively calculate their reliability in the design stage is of great significance for discovering weak links in product design and making design changes. Traditionally, in the early stage of design, engineers mainly use empirical methods to predict the reliability of electronic products. This method relies on the subjective judgment of engineers, which often causes inaccurate over-design problems or ignores certain weak parts. resulting i...

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Application Information

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IPC IPC(8): G06F19/00G06F9/455G06F17/50
CPCY02T90/00
Inventor 骆明珠陈颖叶翠康锐
Owner BEIHANG UNIV
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