摘要
针对RV减速器的可靠性评估需求,结合减速器传动误差及回差的性能退化试验数据,分别建立了可用于描述减速器性能退化过程的Gamma过程传动误差及回差退化模型,利用最大似然估计法对退化模型参数进行估计。以上述两种模型作为一元边缘分布函数,通过Copula函数建立了RV减速器二元退化模型,并对该减速器的可靠性及预期失效寿命进行了评估。结果表明,基于传动误差和回差退化模型的可靠度评估结果与试验结果基本一致,模型能够较为准确地描述RV减速器的性能退化过程。Gaussian Copula函数较适合描述RV减速器二元退化指标间的相关性;采用该函数可得出该工况条件下RV减速器在任意可靠度时的预估失效寿命。
Aiming at the demand for reliability evaluation of RV reducers,the Gamma models,which can represent the performance degenerate process of reducers,are established respectively combining with transmission error data and backlash data of reducer performance degenerate test.A maximum likelihood estimation method is applied to estimate the parameters of degenerate models.Taking the models above as marginal distribution functions,a binary degenerate model of RV reducers is established through Copula function.The reliability and expected failure life of RV reducers are evaluated.The results show that the reliability evaluated by degenerate models based on transmission error and backlash is essentially in agree with the test results.The models can represent the degenerate process of RV reducers accurately.Gaussian Copula function is more suitable for representing the correlation between transmission error degenerate data and backlash degenerate data.Through the binary degenerate model,the expected failure life of RV reducers can be evaluated at different reliability under this working condition.
作者
李金峰
杨翊坤
王西峰
姚良博
肖建明
Li Jinfeng;Yang Yikun;Wang Xifeng;Yao Liangbo;Xiao Jianming(China Productivity Center Machinery Co.,Ltd.,Beijing 100044,China;China Academy Of Machinery Science and Technology Group Co.,Ltd.,Beijing 100044,China)
出处
《机械传动》
北大核心
2023年第5期82-87,共6页
Journal of Mechanical Transmission
基金
国家重点研发计划(2018YFB2001700)
中国机械科学研究总院集团有限公司技术开发基金项目(242108Y)。
