摘要
以密封式电磁继电器为研究对象,分析其失效机理,应用极大似然理论,以在正常应力水平时密封式电磁继电器中位寿命估计值的渐进方差最小为目标,建立了寿命服从威布尔分布密封式电磁继电器加速寿命试验的最优方案模型;并以密封式电磁继电器中位寿命方差的均值和标准离差作为试验方案优劣的评价指标,给出试验方案优劣的评价准则。模拟结果表明,提出的最优试验方案是可行的,可以实现受温度和湿度双应力作用下密封式电磁继电器可靠性水平的快速有效评定。
Taking sealed electromagnetic relays as the research object,with the failure mechanism analyzed and the maximum likelihood theory applied,in order to minimize sealed electromagnetic relays＇ incremental variance of median life estimate on the typical operating condition,the optimal scheme model of accelerated life test for sealed electromagnetic relays which complied Weibull distribution was set up.And its variance of mean and standard deviation were taken as the optimization criterion.Lastly,the simulation results of sealed electromagnetic relays＇ bivariate step-stress accelerated life test were discussed to illustrate the proposed criteria.The simulation results showed that the proposed optimum plan was robust.The optimum test scheme could realize fast evaluation of sealed electromagnetic relays＇ reliability under the effect of temperature and humidity.
出处
《低压电器》
北大核心
2010年第4期13-16,共4页
Low Voltage Apparatus
基金
国家自然科学基金项目(10472091)
关键词
加速寿命试验
密封式电磁继电器
威布尔分布
可靠性
accelerated life test sealed electromagnetic relay Weibull distribution reliability
