Designing a representation to support function; means based synthesis of mechanical design solutions
Designing a representation to support function; means based synthesis of mechanical design solutions
复制标题
设计支持功能的表示；
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
K. Wallace
中科院分区：
文献类型：
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作者：
R. Bracewell;K. Wallace
本文描述了功能-手段-上下文（FMC）结构，这是一组旨在形成计算设计工具基础的表示，旨在综合机械设计问题的解决方案，这些问题目前只能通过非结构化方法来解决。从初始功能需求、顶级上下文和工作原理的选择出发，通过存储规则数据库的应用程序开发FMC结构。可选的完整设计方案由此生成，每个方案都包括零件及其连接列表。通过一个众所周知的案例研究：Pahl和Beitz[1]描述的单手混合器龙头的概念设计，说明了表征和提出的合成过程。在最初，解决方案原则是通过头脑风暴产生的。这里描述的方法利用功能分解和满足规则表示机械设计综合知识。这些规则存储了单个功能或功能结构可以由单个部件或部件和/或功能网络执行的已知方法。在传统机械设计问题的一种不同寻常的方法中，混频器抽头的功能被视为部分涉及信号处理，但由机械元件执行。问题是解码独立的温度和流量需求，给适当的控制信号两个调制孔计量热和冷的供应。在这里描述的表示中，信号流可以通过机械连接的6个自由度中的任何一个的横向或横向变量（速度或力）来传递。
This paper describes the function-means-context (FMC) structure, a set of representations intended to form the basis for a computational design tool, aimed at synthesising solutions to mechanical design problems that can only currently be addressed by unstructured approaches. From an initial functional requirement, a top level context, and a choice of working principle, an FMC structure is developed by the application of a database of stored rules. Alternative complete design schemes are generated from it, each comprising a list of parts and their connections. The representations and proposed synthesis process are illustrated by means of a well known case study: the conceptual design of a one-handed mixer tap as described by Pahl and Beitz [1]. In the original, solution principles were generated by brainstorming. The approach described here utilises functional decomposition and satisfaction rules representing mechanical design synthesis knowledge. The rules store known ways that single functions or function structures, can be performed by single parts or networks of parts and/or functions. In an unusual approach for a traditional mechanical design problem, the functions of the mixer tap are viewed as partly involving signal processing, but performed by mechanical elements. The problem is to decode independent temperature and flow rate demands to give appropriate control signals to two modulated orifices metering the hot and cold supplies. In the representation described here, signal flows may be carried either by the across or the through variable (velocity or force) of any of the 6 degrees of freedom of a mechanical connection.