Towards a Product Model for Virtual Prototyping

1995 ◽  
Author(s):  
Brian W. Henson ◽  
Neal P. Juster ◽  
Alan de Pennington
Keyword(s):  
Reference Model ◽  
Distributed Processing ◽  
Virtual Prototyping ◽  
Product Introduction ◽  
Product Model ◽  
Geometric Information ◽  
Product Models ◽  
Geometric Representations ◽  
Virtual Prototypes

Abstract Most virtual prototypes used within the domain of mechanical engineering are well defined geometric representations loosely linked to analysis packages. By taking a holistic, top-down view of the product introduction process this paper argues that virtual prototypes should be based upon product models that allow for the representation of more than just geometric information. A methodology based upon the reference model for open distributed processing is presented that simplifies the task of deciding what information should be supported. The paper argues that virtual prototypes should use product models that integrate the representation of the geometry, function and behaviour of a product. A case study is presented to show how experimental virtual prototyping software, based on such a product model, can aid the product introduction process.

Conceptual Design Using Generic Object Inheritance

2008 ◽  
Author(s):  
Olof Johansson ◽  
Henric Andersson ◽  
Petter Krus
Keyword(s):  
Conceptual Design ◽  
Power Plants ◽  
Design Parameters ◽  
Product Model ◽  
Complex Products ◽  
Business Jet ◽  
Product Models ◽  
Multiple Copies ◽  
The Impact

Conceptual design for complex products like aircraft and power plants requires a considerable effort since the product models become very large if they are to cover all important aspects for different stakeholders. To cope with this overall effort, designers have to rely on legacy designs and reuse, and improve the product concepts incrementally between product generations. This paper describes a generalized inheritance mechanism we call generic object inheritance that enables quick reuse and modification of conceptual product models at any level in their hierarchical break down structures. By facilitating reuse of conceptual models of previously well studied products, more time can be spent on developing the parts that contain the edge of a new product generation. This enables keeping the modified concepts in context of a complete analyzable product model where the impact of changes can be studied without having to maintain multiple copies of the same object structures. The paper describes how generic object inheritance is used for developing the next version of a conceptual product model of a small business jet, while reusing the essential parts of the previous version with minor modifications to design parameters and substructures. The design and core mechanisms of generic object inheritance are briefly described, and illustrated with examples from the case study.

Virtual Prototyping for Product Demanufacture and Service Using a Virtual Design Studio Approach

1995 ◽  
Author(s):  
David W. Rosen ◽  
Bert Bras ◽  
Farrokh Mistree ◽  
Ashok Goel
Keyword(s):  
Decision Making ◽  
Research Program ◽  
Virtual Prototyping ◽  
Human Interaction ◽  
Design Studio ◽  
Design Decision ◽  
Virtual Design ◽  
Product Models ◽  
Virtual Prototypes ◽  
Simulation Results

Abstract Virtual prototyping is the replacement of hardware prototypes by computational prototypes of systems and the processes that they may undergo. The particular domain of investigation is product demanufacture and service. By catching downstream problems early in the design process through the use of virtual prototypes, more environmentally friendly and easily serviceable products should result. The approach to virtual prototyping pursued here is to combine simulation and human interaction with virtual environment technologies, resulting in a Virtual Design Studio. In the Studio, people will simulate demanufacturing and servicing processes on product models, then incorporate the simulation results into design decision making. The Studio will operate on a design studio metaphor, analogous to the desk-top metaphor utilized in Macintosh computers. This paper represents work in progress. The research program undertaken to construct such a Studio is reported and motivated, an initial design studio metaphor is articulated, and current progress is summarized.

Towards a Specification for a Product Model to Assist the Design of Injection Moulds

2001 ◽  
Author(s):  
Héctor Morano ◽  
Vicente Borja ◽  
Marcelo López ◽  
Álvaro Ayala
Keyword(s):  
Data Model ◽  
Concurrent Design ◽  
Product Model ◽  
New Model ◽  
Model Driven ◽  
Software Applications ◽  
Product Models ◽  
Design And Manufacture ◽  
Data Requirements

Abstract Product models come from the analysis of the data requirements to support the design and manufacture of products. These models are implemented in databases aimed at providing information to software applications that assist the concurrent design of products. This paper presents the requirements of a data model driven software system to aid the design of injection moulds and analyses two product models which were developed in different contexts but capable of representing injection moulded parts and moulds. A case study is used to show the application of each one of the models selected. Finally, some conclusions of the analysis are drawn in order to set the foundation of a new model.

scholarly journals Investigating the health effects of 3 coexisting tobacco and nicotine products using system dynamics population modeling: An Italian population case study

2021 ◽  
Author(s):  
Oscar M Camacho ◽  
Andrew Hill ◽  
Stacy Fiebelkorn ◽  
Aaron Williams ◽  
James J Murphy
Keyword(s):  
Data Availability ◽  
Sufficient Information ◽  
Italian Population ◽  
Product Model ◽  
Product Models ◽  
Life Years ◽  
The Usa ◽  
Complex Models ◽  
Life Years Lost

AbstractWith the proliferation of tobacco and nicotine products, there might be a need for more complex models than current two-product models. We have developed a three-product model able to represent interactions between 3 products in the marketplace. We also investigate if using several implementations of two-product models could provide sufficient information to assess 3 coexisting products. Italy is used as case-study with THPs and e-cigarettes as the products under investigation. We use transitions rates estimated for THPs in Japan and e-cigarettes in the USA to project what could happen if the Italian population were to behave as the Japanese for THP or USA for e-cigarettes. Results suggest that three-product models may be hindered by data availability while two product models could miss potential synergies between products. Both, THP and E-Cigarette scenarios, led to reduction in life-years lost although the Japanese THP scenario reductions were 3 times larger than the USA e-cigarette projections.

An Approach to Integrated Product/Process Design via Virtual Prototyping

1997 ◽  
Author(s):  
Matthew D. Bauer ◽  
David W. Rosen
Keyword(s):  
Process Design ◽  
Optimization Problem ◽  
Development Process ◽  
Virtual Prototyping ◽  
Virtual Prototype ◽  
Process Models ◽  
Product Development Process ◽  
Product Model ◽  
Design Problems ◽  
Virtual Prototypes

Abstract With the introduction of virtual prototyping into the product development process, simultaneous product/process design is enabled. The research reported in this paper illustrates an integration of product and disassembly process design via virtual prototyping. In this context, a virtual prototype is an information model consisting of a product model and one or more process models. Virtual prototype generation is a hybrid process consisting of both automated and interactive tasks. Simultaneous product/process design is accomplished by formulating the integrated product/process design problem as a multiobjective optimization problem in which product/process requirements are evaluated via virtual prototyping. Solution of the integrated product/process design problems is achieved through the application of the MORPS algorithm. Application of the use of virtual prototypes is presented in the simultaneous product/process design of an automotive center console.

Computer Aided Product Structure Modeling Using a DBMS

1993 ◽  
Author(s):  
H. L. Johannesson
Keyword(s):  
Product Structure ◽  
Structure Modeling ◽  
Structure Model ◽  
Product Model ◽  
Geometric Information ◽  
Data Bases ◽  
Embodiment Design ◽  
Product Models ◽  
Computer Based ◽  
Data Base Management System

Abstract In the present paper a computer based method for top-down structure modeling of products is presented. A general hierarchical DBMS-based tree structure model is used. It is designed so that it can be connected to separately designed part product models, containing geometric models and references to standard component data bases and manufacturing documents. Together the presented product structure model and the part product models become a complete product model containing structural as well as geometric information. The structure modeling is meant to be carried out as a first step during the embodiment design phase, before the parts are designed and the standard components are selected. Thus the geometric information is incomplete during the structure modeling phase. A computer program for product structure modeling has been developed. It allows the number of hierarchical structure levels, as well as the number of objects on each level, to be chosen arbitrarily by the user. The data base management system TORNADO is used by the modeling program for building the structure model data bases. A structure modeling example is given in order to demonstrate the structure modeling procedure and the capabilities of the program.

The Assembly of Computational Models for the Collaborative Development of Virtual Prototypes

2009 ◽  
Author(s):  
Hongwei Wang ◽  
Aylmer L. Johnson ◽  
Heming Zhang
Keyword(s):  
Design Process ◽  
Computational Models ◽  
Collaborative Work ◽  
Distributed Processing ◽  
Virtual Prototyping ◽  
System Level ◽  
System Framework ◽  
Collaborative Development ◽  
System Level Modeling ◽  
Virtual Prototypes

In the context of collaborative product development, new requirements need to be accommodated for Virtual Prototyping Simulation (VPS), such as distributed processing and the integration of models created using different tools or languages. Existing solutions focus mainly on the implementation of distributed processing, but this paper explores the issues of combining different models (some of which may be proprietary) developed in different software environments. In this paper, we discuss several approaches for developing VPS, and suggest how it can best be integrated into the design process. An approach is developed to improve collaborative work in a VPS development by combining disparate computational models. Specifically, a system framework is proposed to separate the system-level modeling from the computational infrastructure. The implementation of a simple prototype demonstrates that such a paradigm is viable and thus provides a new means for distributed VPS development.

ExProMod, a Product Development Support Tool

2008 ◽  
Vol 44-46 ◽  
pp. 345-354 ◽  
Author(s):  
Lian Ding ◽  
Jason Matthews ◽  
C. McMahon ◽  
Glen Mullineux
Keyword(s):  
Information Management ◽  
Information Loss ◽  
Future Research ◽  
Product Model ◽  
Model Framework ◽  
Support Tool ◽  
Product Models ◽  
Development Support ◽  
Design And Manufacture

The initial investigations are presented into three equipment design and manufacture companies, and their issues relating to information loss and inaccuracies, and present the employment of an extended product model framework to assist the engineers in overcoming the issues identified. Three key scientific issues in this field are addressed. They are the customer driven goals and practices, design change capture and product models, and the methodology employed to answer the problem stated. The information generated during the service engineer’s visit and the redesign process is encapsulated within a new ExProMod, so that it could potentially be revisited and retrieved throughout the whole product life. A case study has shown that the proposed ExProMod is able to record the information generated in a constraint-based design/redesign so that it has the capability to assist the designers to assimilate and digest constraint-based design, assist the designers to assimilate and digest constraint-based design, offer information management benefits for the machine redesign in the industry, and Presents a tool to capture redesign changes and their respective rationale. In addition, the directions for future research are also prospected.

scholarly journals Investigating the Health Effects of 3 Coexisting Tobacco-Related Products Using System Dynamics Population Modeling: An Italian Population Case Study

2021 ◽  
Vol 9 ◽  
Author(s):  
Oscar M. Camacho ◽  
Andrew Hill ◽  
Stacy Fiebelkorn ◽  
Aaron Williams ◽  
James Murphy
Keyword(s):  
Data Availability ◽  
Sufficient Information ◽  
Italian Population ◽  
Product Model ◽  
Product Models ◽  
Life Years ◽  
The Usa ◽  
Complex Models ◽  
Life Years Lost

With the proliferation of tobacco products, there might be a need for more complex models than current two-product models. We have developed a three-product model able to represent interactions between three products in the marketplace. We also investigate if using several implementations of two-product models could provide sufficient information to assess 3 coexisting products. Italy is used as case-study with THPs and e-cigarettes as the products under investigation. We use transitions rates estimated for THPs in Japan and e-cigarettes in the USA to project what could happen if the Italian population were to behave as the Japanese for THP or USA for e-cigarettes. Results suggest that three-product models may be hindered by data availability while two product models could miss potential synergies between products. Both, THP and E-Cigarette scenarios, led to reduction in life-years lost although the Japanese THP scenario reductions were 3 times larger than the USA e-cigarette projections.

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