Research On Environment And Reliability Test Method Of Automotive Electronic Products

With the increase in the number of automobiles in China and the increasing proportion of auto electrical components in the entire vehicle,the reliability of electrical components is becoming more and more important,but I have started the automotive industry late and studied the reliability of components Relatively little,this paper makes relevant theoretical analysis on the accelerated model,distribution type and acceptance test of reliability test of automotive electrical components,which provides a theoretical basis for the reliability test and acceptance of automotive electrical components.Firstly,the development of reliability test and its application in automobile industry,common failure modes and commonly used acceleration models of automobile electrical parts are introduced.The shortcomings of the current acceleration models of temperature cycle test of automobile electrical parts are analyzed,and the solutions in the tests are given.Secondly,analyze the distribution model and acceleration model,this paper expounds the failure analysis method and the failure analysis often used equipment,the parameters of the Weibull distribution is analyzed in the meaning of the reliability test,the characteristics of the exponential distribution and lognormal distribution of the vehicle electrical components in the accelerated test,then will accelerate model generation into distribution model,obtained under various distribution model of reliability characteristic parameter estimates.Finally,based on the previous analysis of the acceleration model and distribution model,the stress type and distribution ratio were defined according to the layout of parts,and the test time of each model under the requirements of reliability-confidence-part quantity was analyzed from the perspective of the main engine plant(receiver).During the temperature cycle life test of 0 failure product,through the analysis of model and literature data,the test method of changing temperature cycle endurance test saved 25 days in the receiving test of monocular camera.By doubling the rate of rise and fall,the experiment was shortened from 91 days to 66 days,saving about 27 percent of the time.