随机截尾数据下的液压泵故障分布的两参数威布尔分布模型  

Two Parameter Weibull Distribution Model of Fault Distribution for Hydraulic Pump Based on Random Censored Data

作　　者：熊申辉[1] 胡良谋[2] 胡飞 曹克强[2] 景涛[2] 高斌[2] 

机构地区：[1]空军后勤部司令部,北京100720 [2]空军工程大学航空航天工程学院,西安710038 [3]广州军区空军装备部,广州510071

出　　处：《组合机床与自动化加工技术》2016年第4期109-112,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：中国博士后科学基金特别资助项目(201003788)

摘　　要：液压泵在使用阶段的可靠性能最真实地反映产品的实际可靠性水平和薄弱环节,其可靠性数据具有随机截尾特性,因此其可靠性数据分析面临着诸多困难。首先提出了一种基于随机截尾数据的两参数威布尔分布的建模方法,并将其应用于某型液压泵的可靠性数据分析,最后进行了仿真试验研究。仿真试验结果表明,基于平均秩次法的液压泵两参数威布尔分布模型比基于残存比率法的两参数威布尔分布模型更为精确,同时验证了威布尔分布的优越性。研究成果为基于随机截尾数据的液压泵提供了一种更为精确的可靠性分析方法。Operational reliability of hydraulic pump can factually reflect the actual reliability level and weak part. The operational reliability data of hydraulic pump has characteristic of random censored,therefore its operational reliability analysis is very difficult. A modeling method of two parameter Weibull distribution based on random censored data is presented. And then the method is used to establish the two parameter Weibull distribution model of one hydraulic pump. The simulation test is carried out finally. The simulation test results showthat the two parameter Weibull distribution model of hydraulic pump based on the mean rank order method is more accurate than the two parameter Weibull distribution model based on the survival ratio method. And the simulation test results showthat the Weibull distribution is good. The research work can provide a more accurate method of reliability analysis for hydraulic pump based on random censored data.

关 键 词：液压泵 随机截尾数据 两参数威布尔分布 平均秩次法 残存比率法 

分 类 号：TH137[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]