First Steps Towards an All Embracing Relations-Based Modeling

2004 ◽  
Author(s):  
Zolta´n Rusa´k ◽  
Imre Horva´th ◽  
Wilfred van der Vegte
Keyword(s):  
Conceptual Design ◽  
Computer Aided Design ◽  
Conceptual Modeling ◽  
Detail Design ◽  
Functional Aspects ◽  
New Concepts ◽  
Generic Modeling ◽  
Concept Of Information ◽  
Mathematical Definitions ◽  
Aided Design

The focus in computer-aided design is shifting from geometric aspects to functional aspects and from the detail design to a multi-aspect conceptual design. As a consequence, new concepts are emerging and being tested, for instance, for comprehensive geometric and functional modeling in conceptual design. This paper introduces a new approach, which has been called relations-based design. Relations are existential, manifestation and behavioral associations, dependencies and interactions between human, artifacts and environments. Nucleus is introduced as a generic modeling entity, which includes two regions of one or two objects that are interconnected by a system of relations in a particular situation. A design concept (or an artifact) is conceived as a purposeful composition of specific instances of nuclei. The nucleus can be instantiated at multiple levels such as entity, component, subassembly and assembly. A set of relations has been predefined to express qualitative and quantitative associations, dependencies and interactions between objects in a parameterized form on these levels. As a modeling entity, the nucleus offers many advantages in multi-aspect conceptual modeling by integrating incomplete and uncertain geometric, structural, physical and behavioral modeling. The paper introduces the foundational theories, the most important mathematical definitions, and the concept of information management. Finally, it points at some advantages of relations based modeling in the context of application cases comparing it with the physical modeling offered in a commercial system.

An Augmented Reality Tool for Conceptual Design

2009 ◽  
Author(s):  
Andrew Koehring ◽  
Eliot Winer
Keyword(s):  
Augmented Reality ◽  
Conceptual Design ◽  
Computer Aided Design ◽  
Three Dimensions ◽  
Engineering Software ◽  
Engineering Design Process ◽  
Software Packages ◽  
Design Cycle ◽  
Aided Design ◽  
Comprehensive Modeling

Currently, there are many engineering software packages targeted toward high fidelity modeling. Computer aided design (CAD) tools are one example of this. The need for increasingly accurate models has caused this class of software to become even more detailed and comprehensive. Modeling a single design can be a time intensive process; so much so, that most modeling is done by specifically trained CAD professionals, not designers. These advancements in CAD software are at odds with the goal of conceptual design, which is to generate and evaluate as many concepts as possible in a limited amount of time. Within the engineering design process, changes made in preliminary stages have much greater impact for significantly less cost. Unfortunately, few software packages exist that are tailored for use so early in a product’s design cycle. This paper presents an application developed specifically for conceptual design. Through the use of an augmented reality environment, designers are able to quickly and intuitively assemble concepts. Potential designs can be easily manipulated in three dimensions, enhancing the ability to communicate the idea to others.

Research of Ontology Based FPBS Design Model

2013 ◽  
Vol 275-277 ◽  
pp. 2595-2600
Author(s):  
Kang Liu ◽  
Yan Li ◽  
Wu Zhao ◽  
Wen Qiang Li
Keyword(s):  
Conceptual Design ◽  
Computer Aided Design ◽  
Knowledge System ◽  
Design Model ◽  
Structure Model ◽  
Model Function ◽  
Semantic Relationships ◽  
Computer Aided ◽  
Product Design Process ◽  
Aided Design

The conceptual design model for mechanical product and its computer aided design are the important and focus problems. A mechanical product design process of FPBS model, function-principle-behavior-structure model, was put forward and discussed. The semantic relationships between the elements of FPBS model were studied to make foundation for the application of FPBS model. The operational demand of knowledge system for FPBS model was analyzed, and indicates the ontology can be applied effectively to knowledge system operation of FPBS model. Then, an ontology based FPBS model was established and a FPBS ontology model system was constructed. The experimental results indicate the model can be used in computer aided conceptual design for mechanical product effectively.

Intuitive Measurement Interface for Simplified Mesh Models for Rapid Conceptual Design

2010 ◽  
Author(s):  
Christian Noon ◽  
Brandon Newendorp ◽  
Ruqin Zhang ◽  
Eliot Winer ◽  
Jim Oliver ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Measurement System ◽  
Computer Aided Design ◽  
Early Stage ◽  
Systems Design ◽  
Design Teams ◽  
3D Manipulation ◽  
Insufficient Time ◽  
Single Idea ◽  
Aided Design

Conceptual design involves generating hundreds to thousands of concepts and combining the best of all the concepts into a single idea to move forward into detailed design. With the current tools available, design teams usually model a small number of concepts and analyze them using traditional Computer-Aided Design (CAD) analysis tools. The creation and validation of concepts using CAD packages is extremely time consuming and unfortunately, not all concepts can be evaluated. Thus, promising concepts can be eliminated based on insufficient time and resources to use the tools available. Additionally, these virtual models and analyses are usually of much higher fidelity than what is needed at such an early stage of design. To address these issues, an desktop and immersive virtual reality (VR) framework, the Advanced Systems Design Suite (ASDS), was created to foster rapid geometry creation and concept assessment using a unique creation approach which does not require precise mating and dimensioning constraints during the geometry creation phase. The ASDS system removes these precision constraints by using 3D manipulation tools to build concepts and providing a custom easy-to-use measurement system when precise measurements are required. In this paper, the ASDS framework along with a unique and intuitive measurement system are presented for large vehicle conceptual design.

Design Ideator: A Conceptual Design Toolbox

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
S. Narsale ◽  
Y. Chen ◽  
M. Mohan ◽  
Jami J. Shah
Keyword(s):  
Conceptual Design ◽  
Computer Aided Design ◽  
Analogical Reasoning ◽  
Divergent Thinking ◽  
Past Research ◽  
Problem Formulation ◽  
Knowledge Bases ◽  
Concept Generation ◽  
Wide Range ◽  
Aided Design

Computer tools for embodiment and detailed engineering design (computer-aided design (CAD)) evolved rapidly in the past 35 years and are now pervasive throughout the industry. But todays commercial CAD is geometry-centric, not appropriate for early stages of design when detailed geometry and dimensions are not known. This paper describes a framework and a set of interconnected tools for conceptual design. In this system, a broad range of intuitive and experiential concept generation methods have been operationalized and implemented as databases, artifact repositories, knowledge bases, and interactive procedures to promote divergent thinking. The so-called “Design Ideator” includes methods for flexible and dynamic design problem formulation, re-formulation, and restructuring in the form of hierarchical and re-configurable morphological charts. This tool has been continuously enhanced through three phases of user studies and feedback. The main contributions of this work are as follows. First, this research has created a holistic framework with interlaced knowledge bases from a wide range of methods, as opposed to past research that have relied on single experiential only method. Second, we have formulated algorithms to support several intuitive methods, such as contextual shifting, analogical reasoning, provocative stimuli, and combinatorial play.

Decorative Means in Forming Crystal Domes and Shells

1993 ◽  
Vol 8 (4) ◽  
pp. 251-259
Author(s):  
N.A. Gogoleva
Keyword(s):  
Conceptual Design ◽  
Computer Aided Design ◽  
Design Procedure ◽  
Shell Structures ◽  
Geometrical Modelling ◽  
Shape Formation ◽  
Decorative Element ◽  
Computer Aided ◽  
Multiple Alternative ◽  
Aided Design

This paper discusses the conceptual design of decorative crystalline domed structures. The application of the structure itself as a decorative element in combination with three ways of shape-forming: spatial, structural and geometrical, is a feature of such composite shape formation of crystalline domed shells. The author developed a computer-aided design procedure for decorative means of forming crystalline dome-and-shell structures. The procedure can be applied to preliminary multiple-alternative geometrical modelling of ornamental-decorative constructural forming of networks as well as designing the decorative finish to domed shell surfaces.

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