公理设计中关键性耦合设计参数识别方法

Identification of Key Coupled Design Parameters in Axiomatic Design

应用公理设计进行产品设计时,耦合设计往往会不可避免地出现,针对此问题,提出一种识别关键性耦合设计参数的方法。利用分解操作识别耦合的功能集,采用基于三角模糊数的层次分析法对耦合功能集进行量化;然后基于全微分的方法将设计矩阵转化成基于功能要求的由设计参数构成的设计结构矩阵,对设计结构矩阵进行矩阵分析并提出工作量变换矩阵模型,以判断设计是否收敛并识别最能影响设计迭代的关键性设计参数;最后结合水冷卧式壳管式冷凝器产品的设计实例,对上述方法进行验证,分析表明该方法可以有效识别影响设计反复迭代的关键设计参数和设计模态,快速确定耦合原因的症结所在,从而指导进一步的再设计。

During the product design process with axiomatic design approach, coupled design is usually inevitable especially for complex product. Therefore, a method for identification key coupled design parameters is developed. Coupled functional requirement set is separated by using partition operation, and is quantified with analytical hierarchy process based on triangular fuzzy number. The coupled design matrix is transformed into design structure matrix of the design parameters based on functional requirements utilizing total differential calculation, and subsequently work transform matrix model is established to judge whether the design is convergent and identify key coupled parameters that cause design iterations mostly. A horizontal shell-tube condenser is selected as an illustrative example, and the validation results show that the presented method can identify the key coupled parameters and design modes, which mostly lead to long development cycle, and offer guidance for further redesign.