Publications

Liste des publications sous Proton

Abstract: In a collaborative computer-supported engineering environment, the interoperation of various applications will need a representation that goes beyond the current geometry-based representation, which is inadequate for capturing semantic information. The primary purpose of this paper is to discuss a semantically-based information exchange protocol that will facilitate seamless interoperability among current and next generation computer-aided design systems (CAD) and between CAD and other systems that use product data.    We describe an ontological approach to integrating computer-aided design (CAD) and computer-aided process planning (CAPP). Two commercial software applications are used to demonstrate our approach. The approach involves the development of a shared ontology and domain specific ontologies in the KIF (Knowledge Interchange Format) language. Domain specific ontologies--which are feature-based—are developed after a detailed analysis of the CAD and the CAPP software. Mapping between the domain ontologies and the shared ontology is achieved by several mapping rules. The approach is  validated by using a variety of parts.
 Résumé : Les changements dans le monde industriel de ces dernières années ont donné lieu au développement d’un mode de travail qui a pris de plus en plus d’ampleur ces 20 dernières années : l’Ingénierie Concourante. Sa mise en œuvre est source de nombreux problèmes car elle entraîne de profonds bouleversements, que ce soit au niveau des mentalités ou au niveau des méthodes de travail. En effet, les concepteurs ne travaillent plus de manière séquentielle et individuelle mais parallèlement et coopérativement avec leur propre point de vue sur le développement du produit. L’objectif de cet article est de fournir un état de l’art sur l’Ingénierie Concourante, en s’intéressant pour cela à quelques points clés qui caractérisent cette approche, à savoir les méthodologies de conception, la modélisation des informations, la gestion des points de vue de différents experts ainsi que la gestion et l’organisation de l’Ingénierie Concourante au sein des entreprises.

 Résumé : Recent research works concerning cooperative and concurrent engineering, increasingly interest industrial firms. The companies can not any more ignore this approach due to industrial needs such as improvement of quality and reduction of cost and delay. The objective of this paper is to propose an approach allowing the different experts or firms, to cooperate via Internet. To be able to manage the communication difficulties, we represent the information models according to STEP standard. For validation of our representation, the proposed model is studied within an industrial case. Then a prototype structure is shown with the tool data access web screen. This prototype should help different experts to share their point of view.

Résumé : Le travail coopératif est source ces dernières années de nombreuses recherches. Cette nouvelle approche de la conception de produits permet à présent à différents experts de confronter au plus tôt leurs idées et ainsi de réduire les temps et les coûts de fabrication. L’objectif de cet article est de proposer une approche pour la représentation des points de vue de plusieurs experts durant les phases de conception. Pour cela, nous exprimons les problèmes liés à un environnement de travail coopératif pour ensuite exprimer, à l’aide de la norme STEP, les différents modèles que nous avons défini pour gérer plusieurs points de vue. Enfin, nous terminerons par un exemple d’application de ces modèles en étudiant le cas du connecteur électrique.

Résumé : Currently, computer aided systems have concentrated on the capture and representation of geometric shape and technical information, as opposed to providing support for product design. The aim of this paper is to propose a framework for an integrated software that assists designers in the early design phases to work in co-operative and collaborative manner.

 Résumé : The technological advances carried out these last years in the field of products development led the researchers to elaborate approaches that reduce the cost and time of product development, enhance the quality of product and help the designers to be more creative. Currently, computer aided systems have concentrated on the capture and representation of geometrical shape and technical information as opposed to provide supports for product design in the earlier stages of design process. The aim of this paper is to present a meth-odology to aid designers during the first stages of design. The standard models using the STEP standard are proposed in order to ensure co-operative and collaborative works during the first stages of design. Then, we apply our methodology in the case of a bottle design by considering multiple designers' viewpoints.

Résumé : Recent trends in computing environments and engineering methodologies indicate that the future engineering infrastructure will be distributed and collaborative, where designers, process planners, manufacturers, clients, and other related domain personnel communicate and coordinate using a global web-like network. The designers may be using heterogeneous systems, data structures, or information models, whose form and content may not be the same across all disciplines. These CAD applications generally do not use the same format for data input and output and interoperability is a major concern. Current standards mostly address the interoperability issue between traditional CAD systems, with the primary focus of communicating geometry. In the design anywhere manufacture anywhere paradigm described above, we need to have appropriate mechanisms for communicating design information to manufacturing software, in particular process planning. This is in addition to CAD-CAD interoperability. However, in current industrial practice, conceptual design, process/resource selection, time/cost estimation, detailed design, and process planning are performed independently, without integrated software tools. This is primarily because conceptual design systems, detailed design systems, cost estimating systems, and process planning systems are not designed for interoperability. Design and manufacturing data and messages cannot be efficiently sent from one system to another. Interoperability is further complicated as we need to communicate between different domains (in contrast to CAD-CAD interoperability). Due to this information barrier between design and manufacturing systems, errors made during the early stages of design cannot be timely discovered and tend to exponentially contribute to the cost of the final product. Hence, there is a need for developing an infrastructure and associated protocols for integrating design and manufacturing information throughout the design-manufacturing life cycle. In this paper, we first review the existing methods for product data exchange. Then we describe a new approach which improves the data exchange by taking into account the semantics of data. This approach is based on ontologies, which allows the formalization of concepts related to product development in an appropriate context. Finally, we verify this approach for two commercial software tools in the framework of design and process planning data exchange.

Résumé : Recent research works concerning cooperative and concurrent engineering, increasingly interest industrial firms. The companies can not any more ignore this approach due to industrial needs such as improvement of quality and reduction of cost and delay. The objective of this paper is to propose an approach allowing the different experts or firms, to cooperate via Internet. To be able to manage the communication difficulties, we represent the information models according to STEP standard. For validation of our representation, the proposed model is studied within an industrial case.

Résumé : Recent research works concerning cooperative and concurrent engineering, increasingly interest industrial firms. The companies can not any more ignore this approach due to industrial needs such as improvement of quality and reduction of cost and delay. The objective of this paper is to propose an approach allowing the different experts or firms, to cooperate via Internet. To be able to manage the communication difficulties, we represent the information models according to STEP standard. For validation of our representation, the proposed model is studied within an industrial case. Then a prototype structure is shown with the tool data access web screen. This prototype should help different experts to share their point of view.

 

Résumé : Ces dernières années, les recherches concernant le travail coopératif et l’Ingénierie Simultanée (IS) intéressent de plus en plus d’organismes. Les enjeux industriels, en terme de qualité, de coût et de délai de production, sont tels que les entreprises ne peuvent plus ignorer cette approche qui devient de plus en plus un atout concurrentiel. L’objectif de cet article est de proposer une approche permettant de faire coopérer sur un même système informatique , différents experts ou entreprises. Pour pouvoir gérer et exprimer les difficultés d’ un travail coopératif, nous allons exprimer, chacun des modèles d’information à l’aide du format d’échange standard STEP. Après avoir présenté ces différents modèles, nous les instancierons en prenant comme exemple une pièce industrielle, puis nous présenteront une première ébauche du logiciel prototype en cours de développement.

Corinne Cauvet (Université d'Aix-Marseille III)
Yvon Gardan (Université de Reims Champagne-Ardennes)
Jean-Pierre Giraudin (ENSIMAG - Grenoble)
Mohand-Saïd Hacid (Université Claude Bernard Lyon I)
Jean-François Rigal (INSA - Lyon)