关键词: 可靠性, 模型转换, 数据统计分析, 自适应加速寿命试验

Abstract:

According to the accelerated life testing data statistics analysis, the different stress level failure data must be converted into the same standard time series. The calculation is complicated and troublesome and the statistical efficiency is low. This defect can be effectively overcome by the double truncation data elimination method of the exponential distribution. So a double truncation data elimination method based on model transformation was proposed. At frist, the Weibull distribution was converted into exponential distribution because the numerical control system lifetime obeys the Weibull distribution, then the statistical analysis of the SA-ALT data was done.

Key words: reliability, model transformation, test data statistics analysis, self-adaption accelerated life test(SA-ALT)