Research of Multiple Stresses Accelerated Life Model Verification Method

For the problem that applicability of accelerated life model cannot be quantitatively assessed, by transforming accelerated life model into a more general linear model, meanwhile, by transforming the applicability validation problem of accelerated life model into the coplanarity test problem of spatial data points from the perspective of three-dimensional space, from the point of view of statistical test, accelerated life model under multiple stresses are fitted by multiple linear regression method. Taking the statistic as the test target, which characterizes the relative size of the sum of square of vertical distance between spatial data points and fitted values, and the sum of deviation square of spatial data, the verification method of multiple stresses accelerated life model by using constant stresses accelerated life test data is proposed, which can quantitatively assess the applicability of accelerated life model. After the verification of Y11P series aerospace electrical connectors' generalized Eyring model, the confidence level of model is quantitatively obtained. The verification result shows that the generalized Eyring model can preferably describe the nature of the electrical connectors' life characteristics variation under multiple stresses of temperature and vibration.