摘要
传统的基于事后统计的可靠性评估手段已不能满足高可靠性航空电子设备的设计需求。文章提出在产品的设计阶段应用一种基于故障物理的可靠性评估方法,以某型大气数据计算机为研究案例,将环境载荷模拟施加于产品数字模型上,提取应力信息,进行潜在故障机理分析和相应的故障物理模型确认,以及累积损伤分析,最后得到产品的故障前时间以及故障率和可靠度函数。结果表明,该方法与实际可靠性试验结果有较好的近似度。
The traditional way of estimating the reliability of the aviatic electrical equipment is not good for the aviatic electrical equipment of high-reliability. A new method is proposed based on the physics of failure. According to the analysis of the local stress, the failure mechanism and model are identified, then the time to failure is obtained. The result is close to that of the real reliability test.
出处
《航天器环境工程》
2016年第2期216-219,共4页
Spacecraft Environment Engineering
基金
国家国防科工局技术基础课题"航空电子设备结构可靠性分析
评估和验证技术"(项目编号:Z201201005)
关键词
高可靠性
故障物理
故障前时间
可靠性评估
high-reliability
physics of failure
time to failure
estimate of reliability
