1. 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

2. 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

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

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

5. 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 ( )

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

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

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

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

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

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

12. 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