性能退化双线性过程方法与成组试验方法的比较

针对性能退化可靠性分析问题,将双线性过程方法与成组试验方法进行了对比分析.首先,从理论层面阐述了双线性过程方法和成组试验方法对性能退化数据的建模过程,可以发现:双线性过程方法通过将性能退化数据作为一个整体进行统计分析,能够避免两步估计造成的信息浪费,提高分析精度.其次,以窗雨刮器开关性能退化试验为例进行了对比分析,结果表明,双线性过程方法共有2.5%的试验数据位于概率为90%的百分位值曲线估计结果上方,符合工程实际需要,而成组试验方法共有15%的试验数据位于百分位值曲线估计结果上方.此外,基于残差分析的模型检验结果表明双线性过程方法更为合理.

Comparison of bilinear process method and group test method for performance degradation

For the performance degradation reliability analysis, comparison of bilinear process method and group test method was conducted. The modeling procedure of these two methods was theoretically discussed. It can be found consequently that, the analysis precision of bilinear process method can be improved based on the one-stage estimation process, helping to avoid information waste. A reported window wiper switch performance degradation test was then considered to verify these two methods. Comparative analysis of the 10th percentile curve indicates that, the bilinear process method with 2.5% upper test data, can derive more reasonable results, compared with the group test method with 15% upper test data. In addition, model validation based on the residual analysis illustrates the effectiveness of the bilinear process method.