本文選題：相似度評價 + 可靠性預計�。� 參考：《工程設計學報》2017年03期

【摘要】：在用傳統(tǒng)的相似產品法進行可靠性預計時,所選取的相似產品與評價對象之間差異較大,會造成預計結果的偏差較大。為解決這一問題,提出了一種基于"功能—運動—動作"結構化分解的可靠性預計新方法。通過明確產品的各大運動功能建立功能層,分析完成各功能的機械部件運動建立運動層,確定實現(xiàn)各機械部件運動的元動作運動單元建立元動作層,建立了可靠性預計的"功能—運動—元動作運動單元"層次模型。引入?yún)^(qū)間層次分析法,確定了"功能—運動—元動作運動單元"層次模型中各子代運動單元對父代運動單元的可靠性影響權重,并構建了由子代運動單元預計父代運動單元可靠性的數(shù)學模型。確定影響評價機械結構相似度的因素,構建了區(qū)間數(shù)綜合評判云模型并選取與元動作運動單元相似的參考結構,以區(qū)間數(shù)綜合評價云模型得出的相似度值修正參考結構的可靠性數(shù)據(jù)來預計元動作運動單元的可靠性。將元動作運動單元的可靠性預計值代入數(shù)學模型,層層預計父代運動單元的可靠性,從而得出整個產品的可靠性水平。最后以數(shù)控轉臺為例進行了分析,得出了可靠性預計值,并將該方法與傳統(tǒng)方法進行了比較。結果表明,新的可靠性預計方法具有較好的可行性和較高的準確性。
[Abstract]:When using the traditional similar product method to predict the reliability, the difference between the selected similar product and the evaluation object is great, which will result in a large deviation of the predicted result. In order to solve this problem, a new reliability prediction method based on structured decomposition of "function-motion-action" is proposed. By defining the functional layer of each major moving function of the product, analyzing the movement of each functional mechanical part to establish the motion layer, determining the meta-action unit to realize the movement of each mechanical component to establish the meta-action layer, A hierarchical model of function-motion-meta-motion unit for reliability prediction is established. By introducing the interval Analytic hierarchy process (AHP), the influence weight of each generation motion unit on the reliability of the parent motion unit in the "Function-Movement-Meta-Action Motion Unit" hierarchical model is determined. A mathematical model for predicting the reliability of parent kinematic units is constructed. The factors affecting the similarity of mechanical structures are determined, and the interval number comprehensive evaluation cloud model is constructed, and the reference structure similar to the meta-action motion unit is selected. The reliability of the meta-action motion unit is predicted by modifying the reliability data of the reference structure with the interval number synthetically evaluating the similarity value obtained from the cloud model. The reliability prediction value of the meta-action motion unit is substituted into the mathematical model, and the reliability of the parent motion unit is predicted layer by layer, thus the reliability level of the whole product is obtained. Finally, the numerical control turntable is analyzed as an example, the reliability prediction value is obtained, and the method is compared with the traditional method. The results show that the new reliability prediction method is feasible and accurate.
【作者單位】： 重慶大學機械工程學院;重慶大學機械傳動國家重點實驗室;
【基金】：國家自然科學基金資助項目(51575070,51305418) 國家科技重大專項(2014ZX04001-031,2015ZX04003003-07,2015ZX04003003)
【分類號】：TB114.3

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