Research on degradation modeling of pick-up time for aerospace electromagnetic relay in long-term stockpile

The storage degradation test system for aerospace electromagnetic relay (EMR) is designed, which uses FPGA and ARM SCM architecture as system's hardware core. The degradation data rule of pick-up time parameters for aerospace EMR is tested. And the variation law of pick-up time changing with time is obtained. The change of pick-up time is analyzed and verified, which is mainly caused by reeds reaction occurred relaxation. Then, pick-up time and reed reaction exists the approximate linear relationship was found. So, the pick-up time can characterize the degradation of reed relaxation. The storage degradation model of pick-up time is estimated through regression theory. The research results in this paper provide the necessary theoretical method and basis for studying storage reliability and life prediction of the aerospace EMR.