Application of storage life prediction model based on performance degradation distribution in fuze storage life prediction

摘要

How to evaluate the storage life of inventory fuze with the test data of previous years is an urgent problem to be solved at present. Based on the performance degradation distribution, this paper presents a storage life prediction model for high reliability and long life fuze. It is divided into normal type and Weibull type. First, the degradation data are tested by distribution hypothesis testing, and the life prediction model is selected. Secondly, the performance distribution parameters are calculated and the curves are fitted to obtain the relationship between the parameters and the time that is the performance degradation model, and then the failure threshold D_f and the performance degradation distribution model are brought into the life prediction model, and the life evaluation equation is established. Finally, selecting the reliability of fuze prediction unit to predict fuze life. In this paper, we use the Normal and Weibull type life prediction models to predict the life of the detector unit of capacitance proximity fuze. The Normal and Weibull type prediction results are 21.332 and 20.707 years respectively, and the two model calculation results meet the requirements of the fuze storage life.