A Client/Server Implementation of the Design Process Using PDES/STEP “Level 3” Data Sharing Architecture

1993 ◽  
Author(s):  
Esther A. Edwards-lwe
Keyword(s):  
Data Sharing ◽  
Design Process ◽  
Concurrent Engineering ◽  
Data Exchange ◽  
Product Information ◽  
Global Market ◽  
Lessons Learned ◽  
Product Model ◽  
Product Data ◽  
Level 3

Abstract The ability to exchange and share product data between and within enterprises is essential for implementing the concepts of concurrent engineering as well as operating in a global market economy. STEP, the STandard for the Exchange of Product Model Data, is an international effort to standardize product information. Product information is used by manufacturing enterprise to design, produce, and maintain a product. The purpose of STEP is to prescribe a neutral mechanism capable of completely representing product data throughout the life cycle of a product. Data sharing can only be discussed in the context of a specific application. The scope of STEP data sharing architecture has progressed from a single shared facility to sharing multiple distributed facilities. This paper discusses the lessons learned from a prototype implementation of the mechanical part design process(es) captured in a network of heterogeneous computers and database management systems to allow for data exchange and sharing between and within an enterprise.

Modeling of Feature-Based Design Process

1998 ◽  
Author(s):  
Fei Gao ◽  
Dieter Roller
Keyword(s):  
Design Process ◽  
Data Exchange ◽  
Concurrent Design ◽  
Product Model ◽  
Product Data ◽  
Product Models ◽  
Critical Issues ◽  
Feature Based ◽  
Feature Based Design ◽  
Feature Evolution

Abstract Capturing design process is becoming an important topic of feature-based modeling, as well as in product data exchange, concurrent design, and cooperative design. Three critical issues on the modeling of design process are considered in this paper, namely, feature concepts, feature evolution, and the semantic consistencies of the states of product models. A semantics-based product model is introduced to facilitate the description of both conceptual and detailed models, and to maintain the semantic consistencies of product states. The process is represented by feature states and their evolution records. Feature type variation and prototype-based design are proposed to support feature evolution. A conceptual description of the design process and an example are given.

NIDDESC—Enabling Product Data Exchange for Marine Industry

1994 ◽  
Vol 10 (01) ◽  
pp. 24-30
Author(s):  
James Murphy
Keyword(s):  
Data Exchange ◽  
Production Control ◽  
Life Support ◽  
Design Tool ◽  
Digital Data ◽  
Model Data ◽  
Product Model ◽  
Product Data ◽  
Information Base ◽  
Marine Industry

The use of computer-aided design (CAD) technology in the U.S. Navy and marine industry has evolved from a drafting-based design tool to a three-dimensional (3D) product-oriented information base, used for design, production and service life support. One of the most significant enhancements to current CAD technology has been the incorporation or integration of non-graphic attribute information with traditional graphics data. This expanded information base or product model has enabled the marine industry to expand CAD use to include such activities as engineering analysis, production control, and logistics support. While significant savings can be achieved through the exchange of digital product model data between different agents, current graphics-based CAD data exchange standards do not support this expanded information content. The Navy/Industry Digital Data Exchange Standards Committee (NIDDESC) was formed as a cooperative effort of the Naval Sea Systems Command (NAVSEA) and the National Shipbuilding Research Program to develop an industry consensus on product data and to ensure these industry requirements are incorporated into national and international data exchange standards. The NIDDESC effort has resulted in the development of a suite of product model specifications or application protocols (APs) defining marine industry product model data. These APs have been submitted for inclusion into the next generation of data exchange standards.

Step Services for Sharing Product Models in a Virtual Enterprise

1998 ◽  
Author(s):  
Martin Hardwick ◽  
David L. Spooner
Keyword(s):  
Virtual Enterprise ◽  
Information Infrastructure ◽  
Lessons Learned ◽  
Product Model ◽  
Product Data ◽  
Distributed Information ◽  
Common Representation ◽  
Product Models ◽  
Future Plans

Abstract This paper focuses on managing product data in a distributed information infrastructure for a virtual enterprise. It exploits the emerging STEP standards as a common representation for exchanging product data within this infrastructure. A set of STEP services is defined that provide the capability for engineers to retrieve and edit parts or a product model and to integrate those edited parts back into the product model. A demonstration of these services as part of a National Industrial Information Infrastructure Protocols Consortium demonstration is then described. The paper ends by discussing lessons learned from this demonstration. It also discusses future plans for development of the STEP services.

The Implementation of STEP Schemas

1993 ◽  
Author(s):  
William C. Burkett
Keyword(s):  
Design Process ◽  
Development Process ◽  
Product Information ◽  
Database Design ◽  
Model Data ◽  
Product Model ◽  
Current Step ◽  
International Standard ◽  
Conflicting Objectives ◽  
Technical Architecture

Abstract The Standard for the Exchange of Product model data (STEP - ISO 10303) is an international standard for the communication of product information between heterogenous systems. In this presentation, the question of how STEP should be implemented is examined. The objectives of the STEP Development process are presented and the resulting effect that these objectives had on the structure of the standard is explained. However, conflicting objectives resulted in a structure that lacked appropriate mechanisms for dealing efficiently with implementation considerations. The STEP Development Process is compared/contrasted with a database design process to discern where implementation considerations (i.e., tuning, optimization) should take place within the process. A technical architecture for the standard is presented and a missing component of the standard is identified and explained: the Implementation Schema. Current STEP efforts with respect to Implementation Schemas are then presented.

A Set-Based Approach to Stamping Designs

1996 ◽  
Author(s):  
Jinkoo Lee ◽  
Allen C. Ward ◽  
S. Jack Hu
Keyword(s):  
Design Process ◽  
Real World ◽  
Concurrent Engineering ◽  
Current Approach ◽  
Lessons Learned ◽  
Computational Tool ◽  
New Approach ◽  
Design Variables ◽  
Engineering Environment ◽  
Selection Of

Abstract This paper describes a new approach to stamping designs in a concurrent engineering environment. The conventional stamping design approach is based on making iterative changes to a single design. In other words, a design has to be quickly guessed in order to proceed with the design process even if there are uncertainties in some design variables. There are two major drawbacks with this current approach: 1) one change in a part design can cause more changes to the designs for other interconnected parts; and 2) it is difficult to accomplish parallel development of stamping and tool designs, because a change to a stamping design may make obsolete the corresponding tool design. To improve ipon these drawbacks, we present a set-based approach to stamping designs in contrast to the conventional approach of making iterative changes to a single design. In this set-based approach, stamping and tool designers represent design possibilities for functional and manufacturing requirements. As the design process continues, the design possibilities are narrowed by removing impossible or infeasible designs with concrete data. As a real-world example, Toyota uses “design tolerances” for design possibilities and “lessons learned” books for manufacturable shapes that are identified through decades of experiences. This paper presents a computational tool developed to support the set-based approach, in which the computational tool contains three components: representation of sets of shapes, removal of infeasible regions, and selection of some feasible shapes for visual checking.

Product Data Exchange to Support Modeling and Simulation

2005 ◽  
Vol 21 (03) ◽  
pp. 160-169
Author(s):  
T. Briggs ◽  
B. Gischner ◽  
P. Lazo ◽  
P. Lazo ◽  
A. Royal ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Electrical Heating ◽  
Model Data ◽  
Product Model ◽  
Shipbuilding Industry ◽  
Product Data ◽  
Computer Aided ◽  
Aided Design

Successful and efficient exchange of product model data has been a major challenge in the shipbuilding industry for the past two decades. The Standard for the Exchange of Product Model Data (STEP) has been developed to enable this capability. Four STEP application protocols (APs) to facilitate the exchange of structural and distributed systems models in shipbuilding were completed in 2003 and were adopted by the International Organization for Standardization (ISO) by mid-2004. In August 2003, ISO 10303–216: Ship Moulded Forms (AP216) became the first shipbuilding STEP AP to be published as an international standard. Participants involved in these efforts represent several major US shipyards, the Navy, and their computer-aided design/ engineering (CAD/CAE) vendors. The thrust of shipbuilding data exchange efforts has now shifted from development to implementation. This paper will report on efforts to develop and use translators for this AP to exchange hull form product data in the ship modeling and simulation arena. In addition, process simulation is becoming common in the design of new ships to validate that the design meets the customer's specifications. Current technology requires that the ship be modeled both in the computer-aided design (CAD) environment and then repeated in the simulation workbench. Not only is this effort inefficient, but it is inherently error prone. Through the National Shipbuilding Research Program (NSRP)-sponsored Integrated Shipbuilding Environment (ISE) projects, we have developed tool sets that use AP227: Plant Spatial Configuration to permit the design to flow smoothly from the CAD workbench to the simulation workbench. This paper summarizes the efforts to develop and use a suite of tools that enables US shipyards to become more productive. It details the specific successes in using AP216 and AP227 for modeling and simulation, as well as efforts to exchange design data electronically between CAD systems. The report also outlines efforts that are underway to use other APs to successfully exchange data describing ship electrical; heating, ventilation, and air-conditioning (HVAC); and controls systems.

The Key Technology Research of Heterogeneous Product Data Exchange and Sharing in Collaborative Design and Manufacturing System

2013 ◽  
Vol 694-697 ◽  
pp. 2432-2437 ◽  
Author(s):  
Shu Fen Liu ◽  
Wei Min Li
Keyword(s):  
Collaborative Design ◽  
Data Exchange ◽  
Data Transfer ◽  
Heterogeneous Systems ◽  
Product Model ◽  
Web Based ◽  
Product Data ◽  
Main Research ◽  
Design And Manufacturing ◽  
Main Research Topic

In the paper, the main research topic is product data exchange of each heterogeneous systems in the process of collaborative design and manufacturing under the condition of mass customization.Based on the research for existing technology of product model information sharing and conversion,put forward the solution to combine STEP with XML,completed product data transfer and exchange among web-based cooperation enterprises. Also,it was researched how to express EXPRESS data model to XML, as well as its application in the network environment, the function of converting STEP Part21 physical file to XML file was realized.

STEP-Compliant Knowledgebase in Support of Customized Product Development for SMEs

2010 ◽  
Vol 97-101 ◽  
pp. 3571-3574 ◽  
Author(s):  
Qing Song Ai ◽  
S.Q. Xie ◽  
Zu De Zhou ◽  
Quan Liu ◽  
L. Tao ◽  
...  
Keyword(s):  
Product Development ◽  
Product Information ◽  
Global Market ◽  
Design Decision ◽  
Machining Processes ◽  
Product Model ◽  
Manufacturing Enterprises ◽  
Exchange Product ◽  
Core Issue ◽  
Customized Products

Nowadays, Small and medium-sized Manufacturing Enterprises (SMEs) are facing intensive competition from the global market. For these SMEs, how to better manage and record the previous Product Development (PD) knowledge has become a core issue for them to improve PD process, cut down development cost and reduce lead time. In this paper, we present our work in developing a STEP (Standard for the Exchange Product Model Data)-compliant knowledgebase for the development of customized products. The paper focuses on how to develop a STEP-compliant knowledgebase that is applicable to different types of customized products. This knowledgebase uses the STEP as a foundation. Tools are developed to model, record and search information such as customer requirements and expectations, engineering responses, product design, decision making and product machining processes, etc. The recorded product information and knowledge in the knowledgebase will then be reused for the development of customized products of similar types.

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