A Comprehensive Optimization Method for Environmental Stress Screening Test and Predictive Maintenance

Abstract

The invention discloses an environmental stress screening test and forecasting repair comprehensive optimizing method, which comprises a planning stage and an executing stage; the planning stage includes three steps which are environmental stress screening test modeling for many times, repair element confirming module and environment stress screening test, and preventive repair planning comprehensive optimization; the executing stage includes the implementation of environmental stress screening test and the predicting repair planning and execution. The method comprehensively considers the environment stress screening effect and the screening cost before the product is put into use, and the influence of the selection of the repair time on the repair cost after the product is put into use; before the product is put into use, the environmental stress condition and the test frequency are comprehensively optimized and selected on the basis of the environmental stress screening test model and the forecasting repair planning model; after putting the product into use, the preventive repair time of is optimized according to the state monitoring data of every product in use after the productis put into use; the method can effectively reduce the total cost of screening and repair.

Description

technical field [0001] The invention relates to the technical field of reliability engineering, in particular to an environmental stress screening test and a comprehensive optimization method for predictive maintenance. Background technique [0002] After the product design is finalized, the means to further improve product reliability mainly include environmental stress screening and preventive maintenance; however, the selection of environmental stress screening test conditions is often determined based on engineering experience or various specifications, and there are the following problems: First , may cause defects and damage to the original intact product due to excessive test conditions; second, unnecessary test costs and time may be caused by excessive screening; [0003] At present, most of the environmental stress screening research is only for the environmental stress screening test itself, without considering the overall cost of product screening and maintenance ...

AI Technical Summary

Problems solved by technology

[0002] After the product design is finalized, the means to further improve product reliability mainly include environmental stress screening and preventive maintenance; however, the selection of environmental stress screening test conditions is often determined based on engineering experience or various specifications, and there are the following problems: First , may cause defects and damage to the original intact product due to excessive test conditions; second, unnecessary test costs and time may be caused by excessive screening;

In addition, over-screening will not pay off if the screening test is too expensive or has a high probability of causing defects in an otherwise sound product

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