摘要
针对火工机构的力学特点,参照"应力-强度"模型,结合成败型产品可靠性评定方法,提出了一种在加严条件下评定火工机构可靠性的方法.试验中将产品置于苛刻的环境条件下,用传统方法评估其可靠性.然后结合火工机构的力学特性计算它在正常条件下的可靠度.该方法是基于火工机构性能特点的计量型可靠性评估方法,由可靠性知识并结合统计学原理推导得到.利用该方法通过几次(如4～5次)试验即可实现具有高可靠度(如0.9999)产品的可靠性评定.这种方法可降低造价昂贵的航天类火工机构的试验费用,使试验评定成为可能.
A strength-stress model for the reliability of pyrotechnical devices is proposed, based on the mechanical characters of the products and one-shot product reliability assessment theory. From this a method for the reliability assessment of pyrotechnical devices is presented. In this method the products are tested under rigorous conditions. If they can still work without failure under such conditions, then the reliability in normal conditions can be calculated through a formula. In this way, high reliability of products can be assessed (e.g. 0999 9) with only a limited number of tests (say 4～5 samples). This method can reduce the large expenses needed in testing pyrotechnical devices.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2004年第2期117-120,共4页
Transactions of Beijing Institute of Technology
关键词
火工机构
可靠性
可靠性评估
pyrotechnical devices
reliability
reliability assessment
