機能要件と空間制約に基づく概念設計法

摘要

This paper proposes a novel conceptual design method and support system named "Conceptual-CAD." Traditional conceptual design consists of functional and shape design stages and these stages are executed in order. During the first or the functional design stage, a functional structure is designed by breaking down product's overall function into the collection of elemental functions. During the second or shape design stage, each part that achieves each elemental function is then designed and built up into the product. The proposed method also consists of functional and shape design stages, but two stages are not executed sequentially but executed simultaneously and cooperatively. Using the proposed method, both functional and shape structures are simultaneously designed from top down by considering the relationships between function and shape at each level. Such simultaneous and cooperative design enables simultaneous pursuit of high-functionality, high-performance, space-saving and weight-saving. In order to enable such design, this paper proposes a novel conceptual design method that consists of functional and shape design systems plus a shape realization system that supports the process of designing shapes from functions and a supervisor that checks discrepancy between functional and shape structures.%近年の消費者ニーズの多様化を初めとした社会状況の変化にrnより，企業はより良い製品や今までになかった新しい製品を，rn限られた開発期間とコストで実現することが求められている．rnこれに対して，CAD,CAE,CAMの普及に伴う，設計活動のrnデジタルエンジニアリング化が積極的に推し進められている．