产品的功能关系模型及其在并行设计中的应用

Product Function Model and Its Implementation in Concurrent Design

面向装配的设计（ＤＦＡ）是并行工程的一个重要子集，它在设计阶段就考虑到装配过程的约束，以保证设计的产品具有良好的结构，能高效地进行装配，本文分析了ＤＦＡ对产品建模的要求，提出了产品功能模型（包括功能关系模型和功能－零件配置模型），给出了功能模型的图和谓词逻辑的建模方法，最后以一实际产品的组建为例，说明了功能模型在ＤＦＡ中的应用。

Design For Assembly (DFA) is an important subset of conscurrent engineering. It involves the assembly process constrains while designing . Nowadays, many efforts are focusing on developing DFA expert system integrated with CAD.To satisfy the information requirements of such a DFA expert system,this paper puts forward DFA oriented Function Relation Model(FRM), FRM emphasizes on the principles of function classification, function function relation(FFR,represented by FFR graph G F and Logic Predicate Representation)and function component deployment relation(FCR,represented by semantic graph G P).A real product is used as an example to show how to apply this model in a DFA expert system.