Consistency of Assembly Related Product Information: Part 1 — Representation

2014 ◽  
Author(s):  
Mehmet Murat Baysal ◽  
Utpal Roy
Keyword(s):  
Decision Making ◽  
Product Development ◽  
Information Exchange ◽  
Product Information ◽  
Spatial Relationships ◽  
Assembly Model ◽  
Product Lifecycle ◽  
Product Model ◽  
Space Requirements ◽  
And Behavior

In this work, NIST’s Core Product Model (CPM) and the Open Assembly Model (OAM) are extended to integrate product information including function and behavior, with an emphasis on assembly, throughout all phases of product development. The consistency validation of product information, and the verification of modified product information are discussed. These processes ensure that the product information has no contradictions and allows tracing through associations without any deficiency or disconnection. In other words, the information model has to be complete in terms of traceability of function, behavior, spatial relationships, etc., in order to support all information exchange activities. The product information representation provides a mechanism for capturing product information and storing it in a database. This representation schema also provides necessary information for any future decision making activities at the End_Of_Life (EOL) environment, such as the replacement or reuse of any part or subassembly. When there is a need to replace one artifact with another, one must consider all of the associations of the existing artifact with other artifacts and the environment, not just functional and space requirements, and the relevant modification(s) of the associated objects has to be verified. So one can manage product lifecycle activities in different perspectives by knowing how the product information is interconnected in various domains and how its characteristics affect each other.

scholarly journals The Open Assembly Model for the Exchange of Assembly and Tolerance Information: Overview and Example

2004 ◽  
Author(s):  
M. M. Baysal ◽  
U. Roy ◽  
R. Sudarsan ◽  
R. D. Sriram ◽  
K. W. Lyons
Keyword(s):  
Product Development ◽  
Information Exchange ◽  
Computer Aided Design ◽  
Product Information ◽  
Product Lifecycle Management ◽  
Product Development Process ◽  
Assembly Model ◽  
Model Data ◽  
Product Model ◽  
Seamless Integration

In early design phases an effective information exchange among CAD (Computer Aided Design) tools depends on a standardized representation for the product data in all PLM (Product Lifecycle Management) tools. The NIST Core Product Model (CPM) and its extension are proposed to provide the required base-level product model that is open, non-proprietary, generic, extensible, independent of any one product development process and capable of capturing the full engineering context commonly shared in product development [1,2]. The Open Assembly Model (OAM) Model extends CPM to provide a standard representation and exchange protocol for assembly. The assembly information model emphasizes the nature and information requirements for part features and assembly relationships. The model includes both assembly as a concept and assembly as a data structure. For the latter it uses the model data structures of ISO 10303, informally known as the Standard for the Exchange of Product model data (STEP)[3]. The objective of the paper is to show how the OAM can be used to realize seamless integration of product information, with an emphasis on assembly, throughout all phases of a product design. A gearbox design example is used to illustrate the process.

Product Information Exchange Using Open Assembly Model: Issues Related to Representation of Geometric Information

2005 ◽  
Author(s):  
Mehmet Murat Baysal ◽  
Utpal Roy ◽  
Rachuri Sudarsan ◽  
Ram D. Sriram ◽  
Kevin W. Lyons
Keyword(s):  
Information Exchange ◽  
Information Structure ◽  
Product Information ◽  
Unified Modeling Language ◽  
Product Development Process ◽  
Assembly Model ◽  
Object Constraint Language ◽  
Product Model ◽  
Geometric Information ◽  
Assembly Features

The objective of this paper is to discuss the main issues for product information exchange through the Open Assembly Model (OAM). The OAM model provides a base level product model that is open, simple, generic, expandable, independent of any vendor software and product development process, and capable of engineering context that is shared throughout the product lifecycle. Two of the main issues in the OAM model are the representation of geometric information of the artifacts (and assembly features) and maintenance of the consistency of the product information among relevant classes based on geometry information. This paper considers the geometry information at three levels: 1) basic geometric information of artifact with position and orientation information, 2) assembly features and their interrelations, and 3) detailed geometric information of all features in the artifact. In addition to geometric information, other relations/associations between the classes in the Unified Modeling Language (UML) based OAM model are maintained by constraints written in Object Constraint Language (OCL). This information structure in the UML and OCL is then mapped into the Extensible Markup Language (XML) for easy information exchange. XML is commonly used and supported by many softwares. Therefore, integration of XML with UML will provide an excellent tool for internet based collaboration.

A Model for Capturing Product Assembly Information

2005 ◽  
Vol 6 (1) ◽  
pp. 11-21 ◽  
Author(s):  
Sudarsan Rachuri ◽  
Young-Hyun Han ◽  
Sebti Foufou ◽  
Shaw C. Feng ◽  
Utpal Roy ◽  
...  
Keyword(s):  
System Level ◽  
Assembly Model ◽  
Product Model ◽  
Collaborative Environment ◽  
Mechanical Assemblies ◽  
Proposed Model ◽  
Electromechanical Products ◽  
Definition Of ◽  
And Behavior ◽  
Product Assembly

The important issue of mechanical assemblies has been a subject of intense research over the past several years. Most electromechanical products are assemblies of several components, for various technical as well as economic reasons. This paper provides an object-oriented definition of an assembly model called the Open Assembly Model (OAM) and defines an extension to the NIST Core Product Model (NIST-CPM). The assembly model represents the function, form, and behavior of the assembly and defines both a system level conceptual model and associated hierarchical relationships. The model provides a way for tolerance representation and propagation, kinematics representation, and engineering analysis at the system level. The assembly model is open so as to enable plug-and-play with various applications, such as analysis (FEM, tolerance, assembly), process planning, and virtual assembly (using VR techniques). With the advent of the Internet more and more products are designed and manufactured globally in a distributed and collaborative environment. The class structure defined in OAM can be used by designers to collaborate in such an environment. The proposed model includes both assembly as a concept and assembly as a data structure. For the latter it uses STEP. The OAM together with CPM can be used to capture the assembly evolution from the conceptual to the detailed design stages. It is expected that the proposed OAM will enhance the assembly information content in the STEP standard. A case study example is discussed to explain the Usecase analysis of the assembly model.

Research on Complex Product Lifecycle Quality Management Technology Based on 3D Product Model

2011 ◽  
Vol 346 ◽  
pp. 96-102
Author(s):  
Xiao Liang Jia
Keyword(s):  
Quality Management ◽  
Product Development ◽  
Product Lifecycle ◽  
Product Model ◽  
Complex Product ◽  
Control Product ◽  
Development Cycle ◽  
Management Technology ◽  
Quality Management Model ◽  
Virtual Product

In connection with characteristics of complex product development, in order to solve problems of long product development cycle, multi-collaborative firms, difficult to control product quality in manufacturing firms, the approach of complex product lifecycle quality management technology based on the collaboration of 3D virtual product and physical product is put forward. The connotation of complex product lifecycle quality management technology based on 3D product model is analyzed. Complex product lifecycle quality management model based on 3D product model is founded also. Base on 3D virtual product model and PLM technology, key technologies on complex product lifecycle quality management are described in detail.

Functional and Behavioral Representation of Product Information for Collaboration in Product Lifecycle

2007 ◽  
Author(s):  
Mehmet Murat Baysal ◽  
Mehmet I. Sarigecili ◽  
Utpal Roy
Keyword(s):  
Product Information ◽  
Behavioral Model ◽  
Spatial Relationships ◽  
Product Knowledge ◽  
Design Phase ◽  
Additional Function ◽  
Conceptual Design Phase ◽  
Unintended Event ◽  
Representation Scheme ◽  
And Behavior

In this study, a functional and behavioral representation model for collaboration in product development is developed to represent assembly-related product knowledge, including its geometry, spatial relationships, function and behavior, which will be used to create a knowledge representation scheme to capture, store, and retrieve product knowledge. In this model, the function, behavior and artifact information is interrelated based on assembly associations. Functional and behavioral inputs and outputs are defined based on the spatial relationships in the assembly, as well as on the geometry of the product. The functional associations among artifacts define the “Behavior Model” with engineering formulas and physical rules. “Behavior Models” then define the behavior of the artifact. Behavior has four different forms for different phases in life cycle: (1) Intended Behavior in the conceptual design phase, (2) Estimated Behavior in the design phase, (3) Observed Behavior in the operation stage, and (4) Evaluated Behavior in the design and operation phases. When an unintended event (behavior) occurs, an additional function can be added to eliminate that effect. As a result, the functional and behavioral model is updated dynamically.

Representation of Function, Behavior, Structure and Interrelationships at Different Abstract Levels of Product Information

2015 ◽  
Author(s):  
Mehmet Murat Baysal ◽  
Utpal Roy
Keyword(s):  
Conceptual Development ◽  
Structural Model ◽  
Product Information ◽  
Product Knowledge ◽  
Behavioral Models ◽  
Product Lifecycle ◽  
Planetary Gearbox ◽  
Consistent Method ◽  
And Behavior ◽  
Assembly Constraints

To foster an effective collaboration during product lifecycle activities, product information must include data on geometry and topology, assembly constraints and associations, design and product processes, the functions and behaviors of the product, and the design intent. A product has many associations among its parts in terms of assembly, function, behavior, tolerance, kinematics, etc. These associations need to be represented in a consistent way, so that they will not conflict with each other. There have been many efforts to connect function and behavior to structure, but there exists no complete, consistent method yet. It is especially critical in the conceptual development of a product, as well as during its evaluation. The work described in this paper should help people make intelligent decisions by allowing them to manage product lifecycle activities from different perspectives (i.e., function, structure, etc.) using the knowledge of how the product information is interconnected, and how artifacts affect each other. In this study, functional and behavioral models have been developed to represent assembly-related product knowledge. These models connect functions, behaviors and structures — through the parts of artifacts using input/outputs and artifacts’ functional associations (i.e. spatial and design relations/requirements) at different abstract levels of product information. A planetary gearbox has been used as a case study to show how the functional/structural model can be implemented.

Diagnosing Engineering Information Interoperability: Recognizing the Value of Standards-Based PLM — Part 1

2005 ◽  
Author(s):  
Manas Bajaj ◽  
Injoong Kim ◽  
Gregory Mocko ◽  
Russell Peak ◽  
Nsikan Udoyen ◽  
...  
Keyword(s):  
Decision Making ◽  
Product Lifecycle Management ◽  
Product Lifecycle ◽  
Product Model ◽  
Business Decision ◽  
Prototype Tool ◽  
Engineering Information ◽  
Domain Models ◽  
Open Standards ◽  
Lifecycle Management

The notion of an open standards-based product lifecycle management (PLM) framework is gaining momentum. In this paper, we describe the idea of a standards-based collective product model (CPM) and its interaction with domain models native to typical engineering tools. A critical hurdle in the development of the CPM from domain models is assessing the compatibility of information in these native models to its corresponding standards-based representation. To address this, we use the concept of “degree-of-openness” of engineering information. This concept comprises three metrics, namely compatibility, coverage and completeness that are used to evaluate the interoperability of information in tool-specific models with its corresponding standards-based representation. We also demonstrate GT-Diagnostics, a prototype tool that evaluates these metrics. Using electrical and mechanical CAD examples, we illustrate the value of these metrics in understanding the relative interoperability of information for engineering and business decision making. Results indicate that the metrics help to identify the sources of incompatibility of information and the areas of possible improvement in the compared schemas.

Development of a Product Information Model to Support Replacement Analysis

2013 ◽  
Author(s):  
Mehmet Murat Baysal ◽  
Utpal Roy
Keyword(s):  
Decision Making ◽  
End Of Life ◽  
Product Information ◽  
Information Model ◽  
Recovery Efficiency ◽  
Product Information Model ◽  
Material Recovery ◽  
Take Back ◽  
Faulty Component ◽  
Space Requirements

For sustainability of environment, legislations in EU, USA, Japan and Australia require manufacturers to take back their products at the End of Life (EOL) and recycle them. The concept of 6R (reduce, reuse, recycle, recover, redesign and remanufacture) is very important for this issue, while reuse has the highest energy and material recovery efficiency. In this study, an integrated product information model has been developed in UML to provide necessary information for any future decision making activities in the EOL stage, such as the replacement analysis of any used part or subassembly. This product information model represents not only product structure but its function, behavior, and their associations in different abstract levels to support replacement analysis of an existing component with a new or a used component available to company. This representation schema provides necessary information for any future decision making activities in the EOL stage, such as the replacement or reuse of any part or subassembly. In an analysis of replacement for a faulty component with a used or new component, this model provides all of the associations of the existing artifact with other artifacts and the environment, not just functional and space requirements, and the relevant modification(s) of the associated objects has to be verified.

Towards the Synthesis of Product Knowledge Across the Lifecycle

2013 ◽  
Author(s):  
Paul Witherell ◽  
Boonserm Kulvatunyou ◽  
Sudarsan Rachuri
Keyword(s):  
Information Integration ◽  
Information Exchange ◽  
Information Quality ◽  
Product Information ◽  
Product Lifecycle Management ◽  
Product Knowledge ◽  
Product Lifecycle ◽  
Information Transparency ◽  
Lifecycle Management

Product lifecycle management is an important aspect of today’s industry, as it serves to facilitate information exchange and management between most, if not all, stages of a product’s existence. As exchanged product information is inevitably subjected to multiple transformations and derivations, information transparency between lifecycle stages can be difficult to achieve. Synthesizing representations of product information across the lifecycle, by creating a lifecycle-stage-independent platform, can provide transparent access to information for both upstream and downstream applications. In this paper, we review previous and ongoing efforts using ontologies as a means to support information integration and interoperability throughout the lifecycle of a product. We propose that existing efforts can be leveraged to create an upper-tiered ontology for product information. The resulting ontology, a core model for product lifecycle information, would support the synthesis and exchange of product information across lifecycle stages, improving access to this information and facilitating lifecycle thinking. We discuss the use of ontologies as a means to create and link paradigm-independent representations. We discuss the translations that product information may face when integrated through ontologies, and the extent to which the integrity of the information can be preserved across the lifecycle. We investigate the role of information quality in the exchange and evolution of product information across the lifecycle. Finally, we discuss the application of an upper-tiered ontology, particularly the advantages offered by increased transparency and interoperability, as a means to support lifecycle thinking for mitigating a product’s sustainability impact.

Research on Technology of Process-Oriented Virtual Assembly Modeling for Product Information

2011 ◽  
Vol 314-316 ◽  
pp. 2177-2184 ◽  
Author(s):  
Zi Jian Liu ◽  
Jing Jing Wan ◽  
Ping Wang
Keyword(s):  
Real Time ◽  
Product Information ◽  
Research Result ◽  
Virtual Assembly ◽  
Assembly Model ◽  
Product Model ◽  
Information Granularity ◽  
Time Requirements ◽  
Topology Information ◽  
Process Oriented

In order to solve the problems such as completeness and following performance of product model information in process of virtual assembly, a process-oriented virtual assembly model for product information is proposed in this paper. It applies attribute frame to constitute the mapping of geometry topology information and non-geometry information, and basis for information granularity, the structure of multi-layer representation for assembly model information is constructed by framework of tree structure. It can satisfy the requirements of representation completeness, dynamic following and real-time requirements in virtual assembly. A modeling system was established and its feasibility was verified by research result.

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