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Reliability simulation test model correction method

A test model and reliability technology, used in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as low calculation efficiency and rough target accuracy, and achieve the effect of improving correctness and reliability

Active Publication Date: 2020-02-28
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that this "try and guess" model correction method not only needs to repeatedly call the simulation software for calculation efficiency is extremely low, but also the target accuracy within 10% is too rough, and it is not clear which parameters need to be adjusted based on experience and perceptual knowledge Theoretical basis

Method used

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  • Reliability simulation test model correction method

Examples

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Embodiment 1

[0039] This patent proposes a reliability simulation test model correction method, which includes a printed circuit board assembly (PCBA) dynamic model correction method and a thermodynamic model correction method, the specific content is as follows:

[0040] 1. Modification method of printed circuit board assembly dynamic model

[0041] The kinetic model correction method includes: initial screening of parameters; quantitative correlation analysis of the screened parameters, and selection of parameters with a correlation coefficient of 0.3-1 as parameters to be corrected; construction of a response surface model for the parameters to be corrected, Fit the polynomial response surface function of the first n order simulation modal frequency y of the printed circuit board assembly and the parameter xi to be corrected; take the minimum value of the absolute value of the difference between the predicted value of the response surface and the measured value as a multi-objective optimiz...

Embodiment 2

[0079]In this embodiment, a certain PCBA in an avionics product is selected to correct its kinetic model and thermodynamic model according to the method of this patent.

[0080] 1. Select a certain PCBA in an avionics product to correct its dynamic model according to the method of this patent. The implementation steps are as follows:

[0081] Step 1: Modal Testing and Initial Simulation

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Abstract

The invention belongs to the technical field of reliability design analysis, and particularly relates to a reliability simulation test model correction method which comprises a dynamic model correction method and a thermodynamic model correction method of a printed circuit board assembly. The dynamic model correction method comprises correction parameter screening and response surface model construction, and the minimum value of the absolute value of the difference between a predicted value and a measured value of a response surface is used as a multi-objective optimization problem; and iterative calculation is performed on the multi-objective optimization problem by adopting a multi-objective genetic algorithm to obtain a corrected parameter value, and the corrected parameter value is substituted into a dynamic finite element model to calculate to obtain a corrected model. According to the invention, the dynamic model and the thermodynamic model of the printed circuit board assembly are corrected; and the correction correctness and reliability are improved.

Description

technical field [0001] The invention belongs to the technical field of reliability design analysis, and in particular relates to a method for correcting a reliability simulation test model. Background technique [0002] At present, in the reliability work of electronic products, a reliability simulation test based on fault physics has been widely used in engineering, which includes the dynamic simulation test of the electronic product machine, the thermal simulation test of the whole machine, the PWA-based A complete set of method flow for fault prediction and reliability evaluation based on Matlab. This method has become an important means to improve the reliability level of products because of its advantages such as short cycle time and low cost, but the low accuracy of simulation results is a major problem restricting the development of this method. In the reliability simulation test, the accuracy of the constructed virtual prototype is one of the important factors affec...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/367G06F119/14G06F119/08
Inventor 王开山丁杰纪华东
Owner CHINA HELICOPTER RES & DEV INST
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