液体火箭发动机试验流量测量系统可靠性评定  

Reliability Evaluation of Flow Measurement System for Liquid Rocket Engine Test

作　　者：杨懿[1] 郭亚男 王永鹏 贾志杰 陈文丽[1] 吕守国 吉喆 YANG Yi;GUO Yanan;WANG Yongpeng;JIA Zhijie;CHEN Wenli;LYU Shouguo;JI Zhe(Beijing Institute of Aerospace Test Technology,Beijing 100074,China)

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《计测技术》2021年第5期108-113,共6页Metrology & Measurement Technology

摘　　要：针对液体发动机可靠性评定的研究现状,从性能可靠性和结构可靠性两个维度对流量测量系统的可靠性进行评定。给出了测量系统性能可靠性的定义,将测量数据视为正态分布,通过区间估计的方法计算单侧可靠性置信下限。给出了测量系统结构可靠性的定义,根据流量测量系统串联可靠性框图,将指数寿命失效型试验信息转换为二项成败型试验信息。采用L-M法(Lindstrom-Maddens),结合查表和线性插值法求解结构可靠性置信下限。该测量系统可靠性评估方法对行业内测量技术人员具有重要的参考意义。Based on current the are research status of liquid engine reliability evaluation,the reliability of flow measurement system is evaluated from two dimensions which performance reliability and structure reliability.The definition of measurement system performance reliability is present.Measurement data is regarded as normal distribution and the confidence limit of one-sided reliability is calculated by interval estimation.The definition of structural reliability of measurement system is also presented.According to the series reliability diagram of flow measurement system,the exponential life-failure test information is transformed into binominal success-failure test information.The(L-M)Lindstrom-Maddens method combined with look-up table and linear interpolation method is used to solve the lower confidence limit of structural reliability.The reliability evaluation method of measurement system would serve as important reference for technicians in the industry.

关 键 词：液体火箭发动机试验 流量测量系统 性能可靠性 结构可靠性 L-M法 

分 类 号：TB937[一般工业技术—计量学]