无失效数据时城轨车辆安全相关继电器可靠性评估方法研究  

Research on Reliability Evaluation Method for Safety Related Relays of Urban Rail Vehicles Without Failure Data

作　　者：段洪亮 DUAN hongliang(CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China)

机构地区：[1]中车长春轨道客车股份有限公司,吉林长春130062

出　　处：《电器与能效管理技术》2024年第6期59-63,共5页Electrical & Energy Management Technology

摘　　要：针对城市轨道车辆安全相关继电器在实际运用过程中一般不会失效,但难以使用常用方法对其寿命分布进行分析评估的问题,给出了2种在无失效数据条件下估算继电器可靠性的方法。一种为分布未知条件下,利用非参数方法将其转化为二项分布的参数估计问题,对可靠度置信下限进行估计;另一种为假设威布尔分布形状参数未知条件下,利用工程经验的形状参数对可靠度置信下限进行估计。通过实例计算证明所提方法的可行性和有效性,并对计算误差进行对比分析。应用所提方法可以有效评估继电器在实际工况下的可靠性,进而为车辆安全可靠运行提供保障。In practical application,the safety-related relays for urban rail vehicles generally do not fail,making it difficult to analyze and evaluate the distribution of their life using common methods.Two methods are proposed for estimating the reliability of relays in the absence of failure data.One method involves using non-parametric methods to transform the problem of estimating the distribution parameters into a binomial distribution under unknown distribution conditions,in order to estimate the lower confidence limit of reliability.The other method assumes unknown shape parameters of the Weibull distribution and uses engineering experience to estimate the lower confidence limit of reliability.The feasibility and effectiveness of the proposed methods are demonstrated through example calculations,and the calculation errors are compared and analyzed.The application of this approach can effectively evaluate the reliability level of relays under actual operating conditions,providing the assurance for the safe and reliable operation of vehicles.

关 键 词：城市轨道 继电器 无失效数据 可靠性评估 

分 类 号：TM581[电气工程—电器]