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Abstract: Referring to the symbiotic theory of organisms, functional
relations are systematically classified at a cognitive level as to
supply necessary action conditions, to remove harmful side effects and
to prevent or smooth away adverse impacts from environment. These
relations are employed to guide designers to further develop the total
functional structure of a desired product for creative design after the
feasible principle solution to its purpose function is retrieved from
the knowledge base. Then a symbiotic theory based process model for
computer aided conceptual design is proposed, comprising the
sub-processes of both functional structure design and principle
conceptual design. According to the action conditions, side effects and
environmental impacts of the retrieved principle solution candidate,
this design model can dynamically and flexibly yield a total functional
structure feasible for the desired product. An illustrative design case
demonstrates that the proposed model is prone to successful development
of creative products and consistent with the design cognitive model.
Key words: Functional structure design Creative design Conceptual
design Design cognition Symbiotic theory Evolutionary design
CLC No: TH122
国家自然科学基金资助项目(50335040,
50175100). Received 20040624, received in revised form 20041122
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