A concurrent engineering-oriented design database representation model (original) (raw)

Design Database Modeling for the Future CAD Systems

To develop the future CAD systems with concurrent engineering functions, a new CAD model, called Concurrent Engineering-oriented Design Database Representation Model (CE-DDRM), is introduced in this research for supporting various lifecycle aspects in concurrent design. In this model, concepts and behaviors of different design database modeling components, including entities, properties, relationships, tasks, and specifications, are defined at meta-class level. Design database is modeled at two different levels, class level and instance level, representing generic design libraries and special design cases, respectively.

Information Management in the Concurrent Design Process

Proc. Int. Colloquium IKM'97, 1997

Former efforts in the integration of design information management have concentrated on interoperability of applications like eg CAD, structural analysis or facility management, applying product data technology with product models introducing additional application independent model ...

Design Process Modeling for the Future Cad Systems

Proceedings of the Canadian Engineering Education Association, 2011

To develop the future CAD systems that support functions of design process modeling, an evolutionary design database model is introduced in this research to describe design requirements and design results developed at different design stages from conceptual design to detailed design. In this model, the evolutionary design database is represented by a sequence of worlds corresponding to the design descriptions at different design stages. In each world, only the differences with its ancestor world are recorded. When the design descriptions in one world are changed, these changes are then propagated to its descendant worlds automatically. Case study is conducted to show the effectiveness of this evolutionary design database model.

A Theoretical Framework for Concurrent Integration of Cad with Downstream Applications

The paper presents a theoretical model for the integration of CAD with downstream activities of a product, in concurrent engineering environment, using STEP standard. A feature-based approach is used in the model since features are considered as the main factor in integration of CAD with downstream applications. Feature conversion is used to transform features from one application model to another. STEP standard is used for data exchange and information sharing between the multiple applications of a product development. To achieve the design of a product to be easy for manufacturing and assembly, and at the same time be cost-effective, Design for Manufacturing (DFM) and Design for Assembly (DFA), the most common and popular DFX tools are mentioned. Using the model, the designer may design products using concurrent engineering philosophy, so that possible design errors can be foreseen and thus corrected in the early design stage. As a result, the total cost and time for developing a product will be significantly reduced. Future work will include the implementation of the framework to a real life problem. This paper presents a new theoretical model for the integration of CAD with downstream applications of a product, in concurrent engineering environment, using STEP as a standard.

System Architecture for Design Function Deployment: A Concurrent Engineering Design System

The development of integrated frameworks and software architectures, represent a major area of focus for further research and applications of concurrent engineering. This paper, in the light of this, addresses the issues paramount to the development of a software architecture for a concurrent engineering design system. This is discussed within the context of Design Function Deployment (DFD), a concurrent engineering design system, which incorporates (i) a prescriptive design model, (ii) a suite of design methods and (iii) supporting knowledgebases and databases, that are used for the concurrent generation of the design solution space and the optimal selection of the most satisfying design. The paper also discusses software requirements for the proposed concurrent engineering design system. It concludes with a comprehensive discussion of the software framework and architecture for the DFD system, as well as establishing fundamental functional specifications for the modules to be constituted within the resulting software architecture.

A Schema-Based Approach to CAD Task Management

Proceedings of the Third Ifip Wg10 2 Wg10 5 Workshop in Cooperation With Gi Itg Fg 3 5 6 5 2 6 on Electronic Design Automation Frameworks When Will the Promise Be Realized, 1992

CAD frameworks are expected to provide a broad spectrum of services to designers and CAD system developers, including tool integration, data management, process management, and methodology management. One of the difficulties in realizing this overall goal is the wide variation in requirements for modeling the information associated with each of these services, and the rough or nonexistent interfaces between them. One such gray area is the conceptual gap between tool invocation and higher level design methodology management. To address this issue, we have introduced the notion of tool-independent CAD tasks as an intermediate representation. A new information model, called the task schema, is used to capture the dependencies between classes of tool and data objects for a given design domain. In this paper, we describe the task schema information model, and present its role in managing design activity in the Hercules CAD Task Management System.

Managing Concurrent Engineering Design Processes and Associated Knowledge

2006

This paper presents our work in collecting and formalizing data about dynamic engineering design processes in microelectronics design projects. The paper reports on our experience in evaluating the design process knowledge acquisition routine by applying it to the real industrial project of Cadence Design Systems, GmbH. The methodology is based on the usage of the ontologies developed in the PSI project. Beside the actual process of formalizing the processes it especially focuses on capturing information about the concurrency among activities.

Modeling and Analyzing Concurrent Design Process for Manufacturing Enterprise Information Systems

Information is a very important resource in manufacturing systems. The vagueness or lack of information leads to uncertainty and information flow conflicts in designing complex engineering products. The formal realization of concurrent design process for manufacturing enterprise information systems is the sticking point of design process management. This paper proposes a novel method of modeling and analyzing for concurrent design process based on the unified modeling language (UML) and the polychromatic sets (PS) theory. Together with the feature-based part design and process planning, UML model of concurrent design process is established using the basic model primitives and constructs of UML activity diagram. According to the mapping principles, UML mode of feature-based part design and process planning is mapped formally into PS contour matrix model. Based on PS contour matrix, the model reduction, path search and time consumption of concurrent design process are analyzed quantitatively and the opportunities are discovered to improve concurrent design process.

An Information Sharing Platform for Concurrent Engineering

Integrated Manufacturing Systems Engineering, 1995

Research is currently being undertaken by several research laboratories into the computer aided support of simultaneous engineering. These support systems aim to assist organisations that have adopted the simultaneous engineering philosophy by providing consistent sources of product and manufacturing information, and by providing access to a diversity of applications that support decision making.