Accelerated-compensated degradation modeling based on step-stress enhancement test data

In the field of defense science and technology, some long-life and high-reliability products cost a lot to carry out reliability test, including life test, degradation test and enhancement test. Thus, a more effective product testing and data analysis method are expected. Reliability enhancement test (RET) is commonly employed to improve products reliability, whose data is usually utilized to determine the working stress limit and damage limit. However, data from RET may contain much more information about products such as degradation process and stress influence information. The stress effect can be divided into: stress acceleration effect and stress compensation effect. The existing research often ignores this information. A modelling method scheme based on different enhancement data characteristics is proposed in this paper. Furthermore, an accelerated-compensated degradation modeling method for the data with degradation-acceleration-compensation data is developed to further utilize enhancement test data and lay the foundation for the subsequent reliability evaluation. At last, the RET data set from the servo system of a typical equipment is adopted to validate the method proposed previously.