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Reliability accelerated testing method of combined stress of integrated mechanical and electrical product

A technology of comprehensive stress and accelerated testing, applied in the testing, measuring devices and instruments of machines/structural components, etc., can solve the problems of low test efficiency and single mechanism, and achieve the effect of accurate calculation results and improved efficiency.

Active Publication Date: 2014-12-31
SHANGHAI INST OF ELECTROMECHANICAL ENG
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Problems solved by technology

[0006] The purpose of the present invention is to provide an accelerated test method for the comprehensive stress reliability of the whole machine of electromechanical products, solve the problems of single failure mechanism and low test efficiency of the whole machine of electromechanical products, and improve the efficiency of accelerated tests

Method used

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  • Reliability accelerated testing method of combined stress of integrated mechanical and electrical product
  • Reliability accelerated testing method of combined stress of integrated mechanical and electrical product
  • Reliability accelerated testing method of combined stress of integrated mechanical and electrical product

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Embodiment Construction

[0025] Hereinafter, the present invention will be further described with reference to the drawings and implementation examples.

[0026] Such as figure 1 As shown, the present invention is specifically implemented through the following process:

[0027] 1) Determine the failure distribution of electromechanical products through numerical simulation

[0028] Analyze the complete machine of an electromechanical product, which includes N Unit products, in which the failure distribution obeys the exponential distribution of electronic components N 1 There are mechanical parts and precision electronic devices whose failure distribution obeys Weibull distribution N 2 The raw materials and typical process products whose failure distribution obeys the log-normal distribution are N 3 One. Use numerical simulation to determine the failure distribution of the whole machine. The main steps are:

[0029] ① Use engineering experience, consult manuals and documents to determine the distribution law...

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Abstract

The invention discloses a reliability acceleration testing method of a combined stress of an integrated mechanical and electrical product. The method comprises the following steps: determining failure distribution of integrated mechanical and electrical products based on numerical simulation; using a combined stress as an integrated accelerated stress and determining an integrated stress acceleration model; and calculating an integrated acceleration coefficient by using the numerical simulation. According to the invention, the combined stress is used as the integrated acceleration test stress and the failure distribution and the of the acceleration coefficient of the integrated mechanical and electrical product are determined by using the numerical simulation method, thereby solving problems that the failure distribution of the integrated mechanical and electrical product can not be determined, the acceleration coefficient calculation error is large, the integrated failure mechanism excited by the single stress is single, and the test efficiency is low.

Description

Technical field [0001] The invention relates to the technical field of reliability tests, in particular to an accelerated test method for comprehensive stress reliability of a complete mechanical and electrical product. [0002] Background technique [0003] At present, the reliability accelerated test carried out on the complete machine of electromechanical products simply assumes that the failure distribution of the complete machine of electromechanical products obeys the exponential distribution. Temperature, humidity, vibration or electrical stress are selected as the single accelerating stress, and the failure of the whole machine excited by the test The mechanism is relatively simple, the test efficiency is low, and the calculated acceleration coefficient has a large error. [0004] According to actual work requirements, the industry needs to use comprehensive stresses that can more stimulate product failures in accelerated tests, and need to obtain the failure distribution an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
Inventor 胡剑敏张绍伟徐银波李加宝王蓓张林梅顾静
Owner SHANGHAI INST OF ELECTROMECHANICAL ENG
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