考虑双重不确定性的机械产品元动作可靠性分配方法  

A Reliability Allocation Method for Meta-action of Mechanical Products Considering Double Uncertainty

作　　者：张威 谢俊 杜彦斌[1] 冉琰[3] 张根保[3,4] ZHANG Wei;XIE Jun;DU Yanbin;RAN Yan;ZHANG Genbao(Chongqing Key Laboratory of Green Design and Manufacturing of Intelligent Equipment,Chongqing Technology and Business University,Chongqing,400067;Hengda Fuji Elevator Company,Huzhou,Zhejiang,313009;College of Mechanical and Transportation Engineering,Chongqing University,Chongqing,400044;College of Intelligent Manufacturing,Chongqing University of Arts and Sciences,Chongqing,402160)

机构地区：[1]重庆工商大学智能装备绿色设计与制造重庆市重点实验室,重庆400067 [2]恒达富士电梯有限公司,湖州313009 [3]重庆大学机械与运载工程学院,重庆400044 [4]重庆文理学院智能制造学院,重庆402160

出　　处：《中国机械工程》2024年第5期802-810,共9页China Mechanical Engineering

基　　金：国家自然科学基金(52005065);重庆市教委科学技术研究项目(KJQN202200834);重庆市高校创新研究群体(CXQT21024);2022年高层次人才研究启动项目(2256010)。

摘　　要：针对元动作可靠性分配中专家评价的不确定性问题,提出了一种同时考虑认知不确定性和随机不确定性的可靠性分配方法。利用功能运动动作(FMA)的层次方法将机械产品进行合理分解,得到产品的基本运动形式(元动作);将专家进行分组并以概率语言术语集(PLTS)进行评价,以降低专家评价的随机不确定性;将各组专家综合评价结果作为证据进行推理,根据证据融合理论综合所有专家信息,并减小专家的认知不确定性影响;计算各元动作权重值,进而将产品可靠性指标分配给元动作。通过应用实例,验证了所提方法的有效性和实用性。A reliability allocation method that considered both cognitive uncertainty and random uncertainty was proposed to address the problems of uncertainty in expert evaluation in meta-action reliability allocation.The mechanical products were reasonably decomposed by using the hierarchical method of function-motion-action(FMA)to obtain the basic motion type(meta-action)of the products.The experts were grouped and evaluated by probabilistic linguistic term set(PLTS)to reduce the random uncertainty of the experts evaluations.The combined evaluation results of the experts in each group were used as the evidences for the inference.And according to the evidence fusion theory to synthesize all experts information and reduce the influences of experts cognitive uncertainty.The weight value of each meta-action was calculated,and then the product reliability index was assigned to the meta-action.The effectiveness and practicality of the method were demonstrated through application examples.

关 键 词：机械产品 认知不确定性 随机不确定性 可靠性分配 元动作 

分 类 号：TH123[机械工程—机械设计及理论]