Feature-Based Collaborative Design in VPDM

2010 ◽  
Vol 37-38 ◽  
pp. 475-481
Author(s):  
Ke Shan Liang ◽  
Jian Zhong Shang ◽  
Li Tang ◽  
Yu Jun Cao ◽  
Chen Cheng
Keyword(s):  
Collaborative Design ◽  
Feature Model ◽  
Sequence Diagram ◽  
Prototype System ◽  
Cad Systems ◽  
Feature Based ◽  
Feature Expression

Based on present research states and new problems of current collaborative design (CD), the paper presents a solution of building Virtual PDM (VPDM) for developing a CD platform on heterogeneous CAD and PDM systems among enterprises. Firstly, VPDM definition and characteristics are put forward, the CD framework in VPDM is proposed and each component of VPDM are analyzed. Secondly, operations and features in CAD are described with Express-G, a unified feature model is built and mapped into database mode. And then, feature-based CD sequence diagram, clients’ status and feature expression are introduced in VPDM environment. At last, prototype system developed using above method makes CD come true in two commercial CAD systems and two commercial PDM systems, which proves that our approach works well.

Flexible Concurrency Control for Synchronized Collaborative Design

2003 ◽  
Author(s):  
Xun Zhou ◽  
Shuming Gao ◽  
Jie Lie ◽  
Fazhi He
Keyword(s):  
Collaborative Design ◽  
Concurrency Control ◽  
Prototype System ◽  
Collaborative Systems ◽  
Cad Systems ◽  
Feature Based

Concurrency control is one of the most important and challenging issues in designing and implementing synchronized collaborative systems. Due to the complexity of collaborative design, the concurrency control in synchronized collaborative CAD systems is much more difficult. In this paper, the specific definitions of the concurrency conflict and intention preservation in the feature-based collaborative design are given. An approach to detecting the defined concurrency conflicts is also presented. Base on them, a prototype system of synchronized collaborative CAD is implemented.

Web-Enabled Feature-Based Modeling in a Distributed Design Environment

1999 ◽  
Author(s):  
Jae Yeol Lee ◽  
Hyun Kim ◽  
Sung-Bae Han
Keyword(s):  
Collaborative Design ◽  
Feature Modeling ◽  
Feature Model ◽  
Internet Technology ◽  
Global Network ◽  
Dynamic Feature ◽  
Distributed Design ◽  
Product Modeling ◽  
Design Environment ◽  
Feature Based

Abstract Network and Internet technology open up another domain for building future CAD/CAM environments. The environment will be global, network-centric, and spatially distributed. In this paper, we present Web-enabled feature-based modeling in a distributed design environment. The presented approach combines the current feature-based modeling technique with distributed computing and communication technology for supporting product modeling and collaborative design activities over the network. The approach is implemented in a client/server architecture, in which Web-enabled feature modeling clients, neutral feature model server, and other applications communicate with one another via a standard communication protocol. The paper discusses how the neutral feature model supports multiple views and maintains naming consistency between geometric entities of the server and clients as the user edits the part in a client. Moreover, it explains how to minimize the network delay between the server and client according to dynamic feature modeling operations.

Minkowski Operators and Features of Voxel Models

1999 ◽  
Author(s):  
V. Chandru ◽  
M. Manivannan ◽  
S. Manohar
Keyword(s):  
Data Structures ◽  
Structural Information ◽  
Prototype System ◽  
Cad Systems ◽  
Feature Based ◽  
Data Structures And Algorithms ◽  
Feature Based Design ◽  
Traditional Representation

Abstract Feature-based design has evolved as a fundamental paradigm for present-day CAD systems. Voxel-based modeling has many advantages over traditional representation schemes but lacks structural information which is lost in voxelization of the objects. In this paper, we propose to augment voxel models with features by a) storing the sequence of modeling operations along with voxel models and b) by defining feature operators. We have implemented these ideas in our prototype system Sirpi as regularised Minkowski operators using simple data structures and algorithms.

Document-Driven Design for Distributed CAD Services

2011 ◽  
pp. 711-736
Author(s):  
Yan Wang
Keyword(s):  
Service Oriented Architecture ◽  
Feature Model ◽  
System Throughput ◽  
Data Interoperability ◽  
Batch Mode ◽  
Cad Systems ◽  
Service Oriented ◽  
Feature Based ◽  
New Feature ◽  
Enterprise Collaboration

Current CAD systems only support interactive geometry generation, which is not ideal for distributed engineering services in enterprise-to-enterprise collaboration with a generic thin-client service-oriented architecture. This chapter presents a new feature-based modeling mechanism, document-driven design, to enable batch mode geometry construction for distributed CAD systems. A semantic feature model is developed to represent informative and communicative design intent. Feature semantics is explicitly captured as trinary relation, which provides good extensibility and prevents semantics loss. Data interoperability between domains is enhanced by schema mapping and multi-resolution semantics. This mechanism aims to enable asynchronous communication in distributed CAD environments with ease of design alternative evaluation and reuse, and improved system throughput and utilization

Document-Driven Design for Distributed CAD Services

2011 ◽  
pp. 371-397
Author(s):  
Yan Wang
Keyword(s):  
Service Oriented Architecture ◽  
Feature Model ◽  
System Throughput ◽  
Data Interoperability ◽  
Batch Mode ◽  
Cad Systems ◽  
Service Oriented ◽  
Feature Based ◽  
New Feature ◽  
Enterprise Collaboration

Current CAD systems only support interactive geometry generation, which is not ideal for distributed engineering services in enterprise-to-enterprise collaboration with a generic thin-client service-oriented architecture. This chapter presents a new feature-based modeling mechanism, document-driven design, to enable batch mode geometry construction for distributed CAD systems. A semantic feature model is developed to represent informative and communicative design intent. Feature semantics is explicitly captured as trinary relation, which provides good extensibility and prevents semantics loss. Data interoperability between domains is enhanced by schema mapping and multi-resolution semantics. This mechanism aims to enable asynchronous communication in distributed CAD environments with ease of design alternative evaluation and reuse, and improved system throughput and utilization

Feature-Based Design: 4 Hypotheses for Future CAD Systems

1993 ◽  
Author(s):  
David W. Rosen
Keyword(s):  
Future Research ◽  
Design Activity ◽  
Research Directions ◽  
Research Issues ◽  
Cad Systems ◽  
Feature Representations ◽  
Feature Based ◽  
Computer Based ◽  
Definition Of ◽  
Feature Based Design

Abstract Features are meaningful abstractions of geometry that engineers use to reason about components, products, and processes. For design activity, features are design primitives, serve as the basis for product representations, and can incorporate information relevant to life-cycle activities such as manufacturing. Research on feature-based design has matured to the point that results are being incorporated into commercial CAD systems. The intent here is to classify feature-based design literature to provide a solid historical basis for present research and to identify promising research directions that will affect computer-based design tools within the next few years. Applications of feature-based design and technologies of feature representations are reviewed. Open research issues are identified and put in the context of past and current work. Four hypotheses are proposed as challenges for future research: two on the existence of fundamental sub-feature elements and relationships for features, one that presents a new definition of design features, and one that argues for the successful development of concurrent engineering languages. Evidence for these hypotheses is provided from recent research results and from speculation about the future of feature-based design.

scholarly journals Smoke Object Segmentation and the Dynamic Growth Feature Model for Video-Based Smoke Detection Systems

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1075
Author(s):  
Md Rashedul Islam ◽  
Md Amiruzzaman ◽  
Shahriar Nasim ◽  
Jungpil Shin
Keyword(s):  
Growth Analysis ◽  
Moving Objects ◽  
Feature Model ◽  
Gaussian Kernel ◽  
Support Vector ◽  
Smoke Detection ◽  
Detection Model ◽  
Detection Systems ◽  
Feature Based ◽  
Growth Feature

This article concerns smoke detection in the early stages of a fire. Using the computer-aided system, the efficient and early detection of smoke may stop a massive fire incident. Without considering the multiple moving objects on background and smoke particles analysis (i.e., pattern recognition), smoke detection models show suboptimal performance. To address this, this paper proposes a hybrid smoke segmentation and an efficient symmetrical simulation model of dynamic smoke to extract a smoke growth feature based on temporal frames from a video. In this model, smoke is segmented from the multi-moving object on the complex background using the Gaussian’s Mixture Model (GMM) and HSV (hue-saturation-value) color segmentation to encounter the candidate smoke and non-smoke regions in the preprocessing stage. The preprocessed temporal frames with moving smoke are analyzed by the dynamic smoke growth analysis and spatial-temporal frame energy feature extraction model. In dynamic smoke growth analysis, the temporal frames are segmented in blocks and the smoke growth representations are formulated from corresponding blocks. Finally, the classifier was trained using the extracted features to classify and detect smoke using a Radial Basis Function (RBF) non-linear Gaussian kernel-based binary Support Vector Machine (SVM). For validating the proposed smoke detection model, multi-conditional video clips are used. The experimental results suggest that the proposed model outperforms state-of-the-art algorithms.

scholarly journals Feature-based translation of CAD models with macro-parametric approach: issues of feature mapping, persistent naming, and constraint translation

2020 ◽  
Vol 7 (5) ◽  
pp. 603-614 ◽  
Author(s):  
Mutahar Safdar ◽  
Tahir Abbas Jauhar ◽  
Youngki Kim ◽  
Hanra Lee ◽  
Chiho Noh ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Parametric Approach ◽  
Model Data ◽  
Feature Mapping ◽  
Product Model ◽  
Cad Systems ◽  
Cad System ◽  
Cad Models ◽  
Feature Based ◽  
Aided Design

Abstract Feature-based translation of computer-aided design (CAD) models allows designers to preserve the modeling history as a series of modeling operations. Modeling operations or features contain information that is required to modify CAD models to create different variants. Conventional formats, including the standard for the exchange of product model data or the initial graphics exchange specification, cannot preserve design intent and only geometric models can be exchanged. As a result, it is not possible to modify these models after their exchange. Macro-parametric approach (MPA) is a method for exchanging feature-based CAD models among heterogeneous CAD systems. TransCAD, a CAD system for inter-CAD translation, is based on this approach. Translators based on MPA were implemented and tested for exchange between two commercial CAD systems. The issues found during the test rallies are reported and analyzed in this work. MPA can be further extended to remaining features and constraints for exchange between commercial CAD systems.

Development of a J2EE Web Application for STEP-Based Design Conformance Checking

2004 ◽  
Author(s):  
Q. Z. Yang ◽  
W. F. Lu
Keyword(s):  
Problem Solving ◽  
Collaborative Design ◽  
Web Application ◽  
Collaborative Problem Solving ◽  
Prototype System ◽  
Conformance Checking ◽  
3D Cad ◽  
Functional Teams ◽  
Process Detection ◽  
Design Conflicts

Product design needs great team efforts from multi-disciplinary participants, even external partners, for collaborative problem solving. Design conflicts within and between functional teams do occur in such a collaborative design process. Detection and resolution of design conflicts through design conformance checking therefore becomes a critical activity in the joint design problem solving. This paper presents the development of a J2EE application prototype to support the STEP-based design conformance checking. A STEP-compliant information model has been specified to represent 3D CAD objects and other design information, while a knowledge representation model been proposed to describe design rules and constraints. The STEP objects and rule objects are managed and processed by the enterprise Java beans of a J2EE application server, which continuously applies the rule objects to the STEP objects and finally draws a conclusion for the design conformance checking. Application scenarios are discussed in the paper to illustrate the effectiveness of both the STEP/rule objects modeling approaches and the prototype system for support of the design compliance checking in distributed environment.

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