A Study on the Estimation of Shelf Life for Fuze MTSQ KM577A1 from ASRP Data
Dongnyok Lee, Keun-Sig Yoon · Journal of Applied Reliability · 2018
Purpose: The purpose of this study is to estimate shelf life of fuze MTSQ (Mechanical Time & Super Quick) KM577A1 from Ammunition Stockpile Reliability Program (ASRP) data.BR Methods: For many years, ammunition test data had been gathered from ASRP. In this study, lot selection criteria and reliability score of functioning time for fuze are proposed. Reliability score of functioning time and failure data are used to estimate shelf life.BRResults: The results of this study are as follows; The failure modes of fuze MTSQ KM577A1 are dud, inverse function and mechanical time functioning failure (not operating in intended time). Dud and inverse function are major failure modes. Fuze MTSQ KM577A1’s shelf life (B5) is estimated 18.2 years conservatively.BR Conclusion: Degradation of chemical components in fuze MTSQ KM577A1 is major factor for its reliability. And shelf life (B5) of fuze MTSQ KM577A1 is estimated 18.2 years conservatively.