摘要
以某型号航天继电器为例,通过对失效机理及其接触退化规律的分析,建立贮存退化失效可靠性统计模型,给出了航天继电器接触寿命分布函数。研制了温度应力航天继电器加速贮存退化试验测试系统,可同时对多达40个继电器进行全自动的退化参数监测。试验结果表明,接触电阻的退化情况和统计分析,确定了各试验温度应力下接触电阻的分布情况,并通过最佳线性无偏估计(BLUE)法进行了参数估计,为进一步对航天继电器贮存可靠性评估和贮存寿命预测提供了参考和依据。
Taking a certain aerospace electromagnetic relay as an object,the degradation mechanism of aerospace relay in long-term storage was investigated.The storage reliability statistical degradation failure model was built.The relay contact life distribution function was given.A test system of aerospace relay storage parameters under temperature-accelerated stress was designed and developed.This test system can monitor and test the contact resistances and time parameters of 40 aerospace relays under several temperatures automatically at the same time.According to the analysis on experimental results,the degradation conditions of contact resistance were given.The contact resistance distribution under different temperatures was determined by statistical analysis.Statistical distribution parameters were estimated by using BLUE method.These studies provide the basis and reference for further aerospace relay storage reliability assessment and life prediction.
出处
《低压电器》
2012年第17期1-7,共7页
Low Voltage Apparatus
基金
国家高技术研究发展计划(863计划)专项经费资助(2009AA04Z110)
关键词
航天继电器
贮存
可靠性
退化
接触电阻
统计分析
aerospace relay
storage
reliability
degradation
contact resistance
statistical analysis
