Validity maintenance for freeform feature modelling
PhD student - Eelco van den Berg |
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In the semantic feature modelling approach, recently developed in our group, the semantics of regular-shaped features can be defined and maintained in a model. For relatively simple features, having prismatic or cylindrical shapes, it is possible to define all kinds of properties; an example is that the entrance of a hole should be open. The approach uses constraint specification and solving techniques, and guarantees that only valid feature models can be created.
In practice, many products have freeform faces because of aerodynamic, aestetic or other requirements. Modelling systems exist with which objects can be designed that contain freeform surfaces. However, several issues are yet to be solved in order to create full-fledged freeform feature modelling systems.
The goal of this project is to develop a feature validation approach for modelling objects with freeform features. A useful set of freeform features, with their characteristic parameters and important properties, will be determined. Methods for defining such freeform features and their properties with constraints, and for maintaining the latter during the modelling process, will be developed. A prototype system with an appropriate model representation and the required constraint solving algorithms will be implemented.
This project is supported by the Netherlands Organization for Scientific Research (NWO).