Real-Time Collaborative Design With Heterogeneous CAD Systems Based on Neutral Modeling Commands

2006 ◽  
Vol 7 (2) ◽  
pp. 113-125 ◽  
Author(s):  
Min Li ◽  
Shuming Gao ◽  
Charlie C. L. Wang
Keyword(s):  
Real Time ◽  
Collaborative Design ◽  
Computer Aided Design ◽  
Time Synchronization ◽  
System Modeling ◽  
Cad Systems ◽  
Network Bandwidth ◽  
Product Models ◽  
Aided Design ◽  
Developing System

This paper presents an integration-based solution for developing a real-time collaborative design (co-design) platform on heterogeneous computer-aided design (CAD) systems. Different from the visualization-based approaches, the product models are allowed to be constructed and modified from various sites together in the proposed collaborative design platform. Our approach is based on a mechanism for the translation between system modeling operations (SMOs) and neutral modeling commands (NMCs). Every operation given by a user on one site is translated into a NMC and transmitted to all the other sites through the network, and then the received NMC is converted into corresponding SMOs on every other site, instantaneously. Since only the commands but not the product data are transferred, the data size under transmission is greatly reduced, so that a real-time synchronization can be achieved with a standard network bandwidth. In addition, by developing system-dependent SMO↔NMC translators on different client CAD systems, users on different sites could join the collaboration by using their familiar CAD systems; this is the benefit that cannot be offered by the homogeneous co-design systems. The prototype implementation proves that our approach works well for integrating various current popular commercial CAD systems into a real-time collaborative design platform.

An Approach to Supporting Synchronized Collaborative Design Within Heterogeneous CAD Systems

2004 ◽  
Author(s):  
Min Li ◽  
Shuming Gao ◽  
Jie Li ◽  
Youdong Yang
Keyword(s):  
Real Time ◽  
Collaborative Design ◽  
System Modeling ◽  
Object Oriented ◽  
Preliminary Test ◽  
Test Results ◽  
Cad Systems ◽  
The Real

This paper presents an approach to building up a synchronized collaborative design platform upon heterogeneous CAD systems. In the approach, Neutral Modeling Commands are used to achieve the real-time exchange of modeling operations between heterogeneous CAD systems. For the Neutral Modeling Commands, an object oriented representation is given and employed to support the translation between System Modeling Operations (SMO) and Neutral Modeling Commands (NMC). Moreover, two kinds of translators, SMO-to-NMC and NMC-to-SMO, are established, which can deal with modification/deletion operations and composite features and user-defined features besides common creation operations. The preliminary test results show that the proposed approach is promising.

scholarly journals AN ANALYTICAL FRAMEWORK FOR COLLABORATIVE CLOUD-BASED CAD PLATFORM AFFORDANCES

2021 ◽  
Vol 1 ◽  
pp. 375-384
Author(s):  
Tucker Marion ◽  
Alison Olechowksi ◽  
Junfeng Guo
Keyword(s):  
Real Time ◽  
Collaborative Design ◽  
Computer Aided Design ◽  
Analytical Framework ◽  
Collaborative Software ◽  
Design Engineers ◽  
Design Iteration ◽  
Physical Product ◽  
Software Platforms ◽  
Aided Design

AbstractCloud computing has had an increasing influence on engineering and design. A hallmark of sites such as Github is the promise of rapid iteration and real-time collaboration. Recently, cloud collaborative software has migrated into the realm of physical product design, with computer-aided design (CAD) software platforms such as PTC's Onshape. In this research, we suppose that the effect of cloud collaborative software is multi-faceted; that this type of tool affords a number of new capabilities and behaviours for design individuals and teams. We develop a framework on how to contextualize the changes to design tasks afforded by the unique attributes of these cloud-based, collaborative design tools. We find evidence in our research of design engineers leveraging many aspects of the framework, particularly in learning and engagement with their team, and with resources available from communities of users. However, we find that real-world design engineers are not yet utilizing the full capability of synchronous cloud-platforms with respect to real-time synchronous design iteration within teams or communities.

Feasibility Study of Multi-User Collaboration Awareness Concepts in Computer-Aided Design Applications

2016 ◽  
Author(s):  
J. Logan Hill ◽  
John L. Salmon
Keyword(s):  
Real Time ◽  
Feasibility Study ◽  
Computer Aided Design ◽  
Cad Model ◽  
Cad Systems ◽  
Computer Aided ◽  
Lost Time ◽  
Aided Design ◽  
Collaboration Awareness ◽  
Small Improvement

New, experimental, synchronous, multi-user CAD systems, such as BYU’s NXConnect, allow users to work together simultaneously in the same CAD model. Although multi-user CAD comes close to approximating the old collaborative drafting table experience, NXConnect still falls short in a few key areas, most notably of which is in collaboration awareness. This results in redundant work and lost time. Investigation was done with other multi-user software to see what features help each user to be aware of what is being worked on. This resulted in a proposed plugin for NXConnect consisting of two elements: a preview-based real-time feature update and a temporary plane indicating where a user is creating a sketch. Teams using NXConnect with and without the plugin were studied. Teams using the plugin found a small improvement in working collaboratively.

scholarly journals Transformation of the Innovative and Sustainable Supply Chain with Upcoming Real-Time Fashion Systems

2021 ◽  
Vol 13 (3) ◽  
pp. 1081
Author(s):  
Yoon Kyung Lee
Keyword(s):  
Supply Chain ◽  
Real Time ◽  
Computer Aided Design ◽  
Production Systems ◽  
Fashion Industry ◽  
Sustainable Supply Chain ◽  
Information Communication ◽  
Manufacturing Planning ◽  
Fashion Products ◽  
Aided Design

Technologies that are ready-to-use and adaptable in real time to customers’ individual needs are influencing the supply chain of the future. This study proposes a supply chain framework for an innovative and sustainable real-time fashion system (RTFS) between enterprises, designers, and consumers in 3D clothing production systems, using information communication technology, artificial intelligence (AI), and virtual environments. In particular, the RTFS is targeted at customers actively involved in product purchasing, personalising, co-designing, and manufacturing planning. The fashion industry is oriented towards 3D services as a service model, owing to the automation and democratisation of product customisation and personalisation processes. Furthermore, AI offers referral services to prosumers or/and customers and companies, and proposes individual designs with perfect styles and measurements using new 3D computer aided design and AI-based product design technologies for fashion and design companies and customers. Consequently, 3D fashion products in the RTFS supply chain are entirely digital, saving time and money with sampling and tracking capabilities, secured, and trusted with personalised service delivery.

Collaborative Design Education Using 3D Printing

2019 ◽  
pp. 286-305
Author(s):  
Kazuhiro Muramatsu ◽  
Sonam Wangmo
Keyword(s):  
Collaborative Design ◽  
Computer Aided Design ◽  
Design Education ◽  
Collaborative Work ◽  
Future Research ◽  
Design Activity ◽  
3D Design ◽  
Group Members ◽  
Design Objects ◽  
Aided Design

Design education is important at technical universities and colleges. In general, real product design requires collaborative work. In this chapter, the authors discuss collaborative design education. An A360 cloud platform on Autodesk's 3D computer-aided design “AutoCAD” is adopted to illustrate a collaborative design activity implemented in the Engineering Graphics class offered at the College of Science and Technology, Royal University of Bhutan. By using A360 cloud, students can share a 3D model with group members. Based on feedback received, students can modify the initial model, share it, print, and discuss the modified object with members. This collaborative work allows students to create enhanced 3D design objects while engaged in discussions and interactions. The authors also discuss some difficulties encountered during the collaborative process and offer recommendations and future research ideas.

Geometric Modelling and Computer-Aided Design

2009 ◽  
pp. 1-31
Author(s):  
Xun Xu
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
Geometric Model ◽  
Point Of View ◽  
Geometric Modelling ◽  
Cad Systems ◽  
Cad System ◽  
Wire Frame ◽  
Computer Aided ◽  
Aided Design

One of the key activities in any product design process is to develop a geometric model of the product from the conceptual ideas, which can then be augmented with further engineering information pertaining to the application area. For example, the geometric model of a design may be developed to include material and manufacturing information that can later be used in computer-aided process planning and manufacturing (CAPP/CAM) activities. A geometric model is also a must for any engineering analysis, such as finite elopement analysis (FEA). In mathematic terms, geometric modelling is concerned with defining geometric objects using computational geometry, which is often, represented through computer software or rather a geometric modelling kernel. Geometry may be defined with the help of a wire-frame model, surface model, or solid model. Geometric modelling has now become an integral part of any computer-aided design (CAD) system. In this chapter, various geometric modelling approaches, such as wire-frame, surface, and solid modelling will be discussed. Basic computational geometric methods for defining simple entities such as curves, surfaces, and solids are given. Concepts of parametric, variational, history-based, and history-free CAD systems are explained. These topics are discussed in this opening chapter because (a) CAD was the very first computer-aided technologies developed and (b) its related techniques and methods have been pervasive in the other related subjects like computer-aided manufacturing. This chapter only discusses CAD systems from the application point of view; CAD data formats and data exchange issues are covered in the second chapter.

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.

scholarly journals Body Bias Optimization for Real-Time Systems

2020 ◽  
Vol 10 (1) ◽  
pp. 8
Author(s):  
Carlos C. Cortes Torres ◽  
Ryota Yasudo ◽  
Hideharu Amano
Keyword(s):  
Real Time ◽  
Computer Aided Design ◽  
Optimization Method ◽  
Design Guidelines ◽  
Real Time Systems ◽  
Total Energy Consumption ◽  
Aided Design ◽  
Time Systems ◽  
Parameter Constraints ◽  
Body Bias

The energy of real-time systems for embedded usage needs to be efficient without affecting the system’s ability to meet task deadlines. Dynamic body bias (BB) scaling is a promising approach to managing leakage energy and operational speed, especially for system-on-insulator devices. However, traditional energy models cannot deal with the overhead of adjusting the BB voltage; thus, the models are not accurate. This paper presents a more accurate model for calculating energy overhead using an analytical double exponential expression for dynamic BB scaling and an optimization method based on nonlinear programming with consideration of the real-chip parameter constraints. The use of the proposed model resulted in an energy reduction of about 32% at lower frequencies in comparison with the conventional model. Moreover, the energy overhead was reduced to approximately 14% of the total energy consumption. This methodology provides a framework and design guidelines for real-time systems and computer-aided design.

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