Models in Engineering Design: Generative and Epistemic Function of Product Models

2018 ◽  
pp. 219-242
Author(s):  
Claudia Eckert ◽  
Rafaela Hillerbrand
Keyword(s):  
Engineering Design ◽  
Product Models ◽  
Epistemic Function

The Roles of Features and Abstraction in Mechanical Design

1994 ◽  
Author(s):  
LeRoy E. Taylor ◽  
Mark R. Henderson
Keyword(s):  
Life Cycle ◽  
Engineering Design ◽  
Design Process ◽  
Design Research ◽  
Mechanical Design ◽  
Product Modeling ◽  
Product Models ◽  
Mechanical Products ◽  
Unique Framework ◽  
The Relationship

Abstract This paper describes the roles of features and abstraction mechanisms in the mechanical design process, mechanical designs, and product models of mechanical designs. It also describes the relationship between functions and features in mechanical design. It is our experience that many research efforts exist in the areas of design and product modeling and, further, that these efforts must be cataloged and compared. To this end, this paper culminates with the presentation of a multi-dimensional abstraction space which provides a unique framework for (a) comparing mechanical engineering design research efforts, (b) relating conceptual objects used in the life cycle of mechanical products, and (c) defining a product modeling space.

Methods of 3D-Modelling With Parametric CAD-Systems of the Newest Generation

1997 ◽  
Author(s):  
Karl-H. Grote ◽  
Soeren Schumann
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Three Dimensional ◽  
Time Saving ◽  
Cad Systems ◽  
3D Cad ◽  
Engineering Design Process ◽  
Product Models ◽  
Computer Based ◽  
The Many

Abstract The authors are searching for new ways of using CAD-systems in the engineering design process. This contents among others the creation as well as the refreshing and continued handling of computer-based, three-dimensional product models to be built as prototypes on the department’s Rapid Prototyping machine [1, 2, 3]. In spite of the many advantages of the C-technologies, on several areas a deficit in its dissemination and effective usage still is noticed. The following paper will give an overview on how the parametrical, feature based 3D-CAD-modeler may support the engineering design process. It is described, which functionality the parametric functions of these modelers are offering to the user and how the work with parametrical CAD-systems is structured. Advises are given for a more competitive implementation and time saving work with these systems.

A shortest path method for sequential change propagations in complex engineering design processes

2015 ◽  
Vol 30 (1) ◽  
pp. 107-121 ◽  
Author(s):  
Yuliang Li ◽  
Wei Zhao ◽  
Yongsheng Ma
Keyword(s):  
Engineering Design ◽  
Shortest Path ◽  
Mathematic Model ◽  
Design Processes ◽  
Sequential Change ◽  
Design Changes ◽  
Engine Design ◽  
Product Models ◽  
Complex Engineering ◽  
Dependent Tasks

AbstractEngineering design changes constantly occur in complex engineering design processes. Designers need appropriate measures to handle the numerous design changes in order to realize consistent and completely validated product models so that successful product development is assured. In this paper, a time-based mathematic model is presented to characterize the sequential change propagation process, and then the shortest path algorithm is given to find the most timesaving routes for changes to propagate to other dependent design tasks. An analysis method is introduced to compute the sensitivities of change impacts on the affected design tasks, which indicates that the more time consumed by a change to take its effect, the more sensitive the change impacts on those downstream dependent tasks. A case study of change propagations in motorcycle engine design process was presented to demonstrate the proposed method.

Collaborative Engineering Design Based on an Intelligent STEP Database

2002 ◽  
Vol 10 (3) ◽  
pp. 239-249 ◽  
Author(s):  
Soonhung Han ◽  
Young Choi ◽  
Sangbong Yoo ◽  
Namkyu Park
Keyword(s):  
Engineering Design ◽  
The Internet ◽  
Collaborative Engineering ◽  
International Standard ◽  
Machining Center ◽  
Product Models ◽  
Search Capability

A pilot system has been developed to promote the collaborative engineering design on the Internet. Product models are stored in a shared database which is formatted according to the international standard STEP. The schema of the database is based on AP203 of STEP. Metadata and ontology concepts are used to improve the search capability of the product database. The system has been applied to a machining center example to verify its feasibility.

An object-centered approach for modelling engineering design products: Combining description logic and object-oriented modelling

1997 ◽  
Vol 11 (3) ◽  
pp. 187-198 ◽  
Author(s):  
M. Maher Hakim ◽  
James H. Garrett
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Data Model ◽  
Description Logic ◽  
Object Oriented ◽  
Data Models ◽  
Schema Evolution ◽  
Product Models ◽  
Object Oriented Modelling

AbstractClass-centered data models, such as the object-oriented data model, are inadequate for supporting engineering design product models because of their lack of support for object evolution, schema evolution, and semantic and user-defined relationships. Description logic overcomes these limitations by providing constructs for intentional description of classes, relationships, and objects. By combining description logic with object-oriented modelling concepts, design product schemas and data can be uniformly represented and modified throughout the design process.

Resolution and measurement in the scanning electron microscope

1987 ◽  
Vol 45 ◽  
pp. 534-537 ◽  
Author(s):  
Michael T. Postek
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Engineering Design ◽  
Resolving Power ◽  
Practical Applications ◽  
Instrument Resolution ◽  
Accurate Definition ◽  
Definition Of ◽  
Scanning Electron ◽  
Better Than

The term ultimate resolution or resolving power is the very best performance that can be obtained from a scanning electron microscope (SEM) given the optimum instrumental conditions and sample. However, as it relates to SEM users, the conventional definitions of this figure are ambiguous. The numbers quoted for the resolution of an instrument are not only theoretically derived, but are also verified through the direct measurement of images on micrographs. However, the samples commonly used for this purpose are specifically optimized for the measurement of instrument resolution and are most often not typical of the sample used in practical applications.SEM RESOLUTION. Some instruments resolve better than others either due to engineering design or other reasons. There is no definitively accurate definition of how to quantify instrument resolution and its measurement in the SEM.

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