AIDA an AI tool for conceptual design of complex products Date Rentema en Erik Jansen Information Technology and Systems Delft University of Technology Design Research in the Netherlands May 25-26, Eindhoven

Design of complex products Concept is first integrated solution for multiple aspects and life-cycle phases to propose concept is difficult to evaluate concept is difficult  qualitative thinking (experience!) Most complex products are built out of components  configuration design

Design representation Function - Behavior - Structure (Gero 92) no forward reasoning - endless search propose-test-evaluate (S  B  F) F1 F2 structure behavior function/performance

Structure parametrized geometry, features geometric constraints for validity assembly of components

Behavior relations, equations, statistics nodes: coëfficients, funct. parameters network building, backward reasoning solving F1 F2 F3 F4.. S1 S2 S3 S4.. area (w,l) funct(x,y) vol ( )

Concept proposal Case-Based Reasoning - CBR cases: known S-F combinations match, select and adapt solution spaceproblem space SF

Concept proposal similarity measure parametrized solution combination of several cases solution spaceproblem space

Creating the concept requirements case configuration assembly prototype behavior geometry topology matching

AIDA set-up case-based reasoning central user interface geometric module functional module design specification feasible concept

Modules Case-based reasoning: EADOCS (Netten, 1997, 1998) Functional (behavioral) module: QUAESTOR (van Hees, 1998) Geometric Module: Pro-Engineer Central interface: custom made

Conclusions Feasible concept for configuration design Further research: similarity measure case representation case adaptation Integrated system with combined geometric and functional solving

Behavior No automatic backward reasoning, thus interactive specification to “fit” geometry F1 F2 F3 F4.. S1 S2 S3 S4.. area (w,l) funct(x,y) vol ( ) structural behavioral functional