抄録
The objective of our study is to realize a computerized method of design diagnosis, that is, a process of detecting questionable portions of a design result and presenting plans for corrections. Computerizing design diagnosis makes it possible to actualize a CAD/CAE system which can remove designer's errors. This paper shows a computerized method of inferring functions of a designed machine, which is inevitable for design diagnosis. As an actual example, a process of the dynamic analysis of a rhombic mechanism is presented. Our system, which treats a specific case where a designed machine is a planar link mechanism with pin joints at present, transforms the structure of a rhombic mechanism described concisely in the feature description method into a frame representation. Then the system automatically generates dynamic equations, which represents the link mechanism as rigid bodies coupled with springs and dampers, in S-expression of LISP as a function representation. The results of numerical analysis of the equations are shown as the inferred functions of the rhombic mechanism.
