摘要
卫星安全性设计往往采用故障模式与影响分析(FMEA)方法,与可靠性设计同时开展。文章分析了卫星可靠性和安全性设计的对立统一关系,以及FMEA方法在安全性设计应用时偏重功能故障分析的局限性,提出采用FMEA方法结合初步危险分析(PHA)和安全检查表分析(SCA)方法,开展卫星安全性设计综合分析评价的策略和安全性设计流程。以卫星在轨加注为例,采用安全性设计综合分析评价流程进行安全性设计研究,结果表明,文章提出的策略和流程可以帮助卫星设计师有效开展系统安全性设计,全面考虑故障模式和其他危险源引发的安全性风险,制定最优的卫星安全性设计方案。
Satellite safety design is usually carried out with reliability design.This paper gives the coherent or conflicting relations between safety design and reliability design,analyzes the limit of FMEA method which focuses on function failure when applied to safety design,and proposes a strategy and a flow based on FMEA,PHA and SCA for analysis and evaluation of satellite safety design.A refueling on-orbit demonstration of the satellite safety design shows that the strategy and the flow can help engineers make effectively safety design considering all failure modes and other risks and optimize the scheme of satellite safety design.
出处
《航天器工程》
2014年第6期85-92,共8页
Spacecraft Engineering
