Design Modification in a Collaborative Assembly Design Environment

2005 ◽  
Vol 6 (2) ◽  
pp. 200-208 ◽  
Author(s):  
C. Lu ◽  
J. Y. H. Fuh ◽  
Y. S. Wong ◽  
Z. M. Qiu ◽  
W. D. Li ◽  
...  
Keyword(s):  
Control Mechanism ◽  
The Internet ◽  
Design Environment ◽  
Detailed Design ◽  
Design Modification ◽  
Assembly Design ◽  
Geographically Dispersed ◽  
Collaborative Assembly ◽  
Feature Based

This paper discusses the design modification issue in a collaborative assembly (co-assembly) design environment, which enables multiple geographically dispersed designers to design and assemble parts collaboratively and synchronously through the Internet. An assembly representation model, viz. feature-based hierarchical co-assembly representation, is proposed to resolve the co-assembly design issues. In order to realize the design modification, a design modification propagation control mechanism is proposed. A system framework that is suitable for realizing the design modification is also proposed and developed. Finally, the detailed design modification propagation control mechanism is demonstrated through a case study.

Representing Tolerance and Assembly Information in a Feature-Based Design Environment

1991 ◽  
Author(s):  
Rajneet Sodhi ◽  
Joshua U. Turner
Keyword(s):  
User Interface ◽  
Design Environment ◽  
Assembly Design ◽  
Assembly Features ◽  
Feature Based ◽  
The Creation ◽  
High Level ◽  
Feature Based Design

Abstract This paper describes a strategy for representing tolerance information and assembly information in a feature-based design environment. The concept of designing with features is extended to incorporate the specification of tolerance information. This allows appropriate tolerancing strategies to be provided within the feature definitions themselves. Thus a closer connection is formed between features and the functional intent implicit in their use. The concept of designing with features is also extended to incorporate the specification of assembly information, through the use of assembly features which provide a high-level user interface for the creation and modeling of assemblies, and which handle the identification and creation of mating relations between components. Several examples of component and assembly design using this extended feature-based approach are presented.

scholarly journals Feature-Based Design Modification in Co-Assembly Design

2004 ◽  
Vol 1 (1-4) ◽  
pp. 411-420
Author(s):  
C. Lu ◽  
J. Y. H. Fuh ◽  
Y. S. Wong ◽  
W. D. Li ◽  
Y. Q. Lu
Keyword(s):  
Design Modification ◽  
Assembly Design ◽  
Feature Based ◽  
Feature Based Design

Feature-Based Assembly Design: Concepts and Design Environment

1997 ◽  
Author(s):  
Monica Bordegoni ◽  
Umberto Cugini
Keyword(s):  
Research Work ◽  
The European Union ◽  
Design Environment ◽  
Design Concepts ◽  
Assembly Design ◽  
Part Geometry ◽  
Mechanical Assemblies ◽  
Feature Based ◽  
Work Done ◽  
Mating Conditions

Abstract The design of mechanical assemblies is mainly done after having modeled single parts. Most of the CAD systems are still weak for what concerns assembly. For example, they do not support the manipulation or the modification of the part geometry or the mating conditions once the assembly is made. The introduction of a feature-based approach in assembly design, successfully used in the design of single parts, would offer several advantages. This paper describes some results of the research work done within a project funded by the European Union aiming at extending the use of features, to help in the solution of assembly problems in the aeronautical applications.

Feature Based Assembly Modeling

1992 ◽  
Author(s):  
Jami J. Shah ◽  
Ravi Tadepalli
Keyword(s):  
Solid Modeling ◽  
Design Environment ◽  
Cad Systems ◽  
Assembly Modeling ◽  
Assembly Design ◽  
Feature Parameters ◽  
Mechanical Assemblies ◽  
Design Changes ◽  
Feature Based

Abstract Contemporary solid modeling based CAD systems provide poor support for defining mechanical assemblies. The assembly definition methods are awkward and cumbersome to use. The resulting model does not capture any associations between the parts mating features. Feature-based part description can not only enhance the assembly design environment, but can also capture assembly mating information. This association between features allows design changes to be made to component parts even after the parts have been put into an assembly. Assemblies can also be validated by means of user-defined procedures and rules based on feature parameters.

Bottom Hole Assembly Design Enhancement Successfully Eliminate Hole Problems and Reduce Significant Drilling Time : South S Field Case Study

2020 ◽  
Author(s):  
Y. D. Mulia
Keyword(s):  
Contact Area ◽  
Cost Savings ◽  
Assembly Design ◽  
Drilling Performance ◽  
Bottom Hole ◽  
Unconsolidated Sand ◽  
Bottom Hole Assembly ◽  
Drilling Parameter ◽  
Drilling Time

For S-15 and S-14 wells at South S Field, drilling of the 12-1/4” hole section became the longest tangent hole section interval of both wells. There were several challenges identified where hole problems can occur. The hole problems often occur in the unconsolidated sand layers and porous limestone formation sections of the hole during tripping in/out operations. Most of the hole problems are closely related to the design of the Bottom Hole Assembly (BHA). In many instances, hole problems resulted in significant additional drilling time. As an effort to resolve this issue, a new BHA setup was then designed to enhance the BHA drilling performance and eventually eliminate hole problems while drilling. The basic idea of the enhanced BHA is to provide more annulus clearance and limber BHA. The purpose is to reduce the Equivalent Circulating Density (ECD,) less contact area with formation, and reduce packoff risk while drilling through an unconsolidated section of the rocks. Engineering simulations were conducted to ensure that the enhanced BHA were able to deliver a good drilling performance. As a results, improved drilling performance can be seen on S-14 well which applied the enhanced BHA design. The enhanced BHA was able to drill the 12-1/4” tangent hole section to total depth (TD) with certain drilling parameter. Hole problems were no longer an issue during tripping out/in operation. This improvement led to significant rig time and cost savings of intermediate hole section drilling compared to S-15 well. The new enhanced BHA design has become one of the company’s benchmarks for drilling directional wells in South S Field.

The Internet is a Semicommons

2018 ◽  
Author(s):  
James Grimmelmann
Keyword(s):  
Open Field ◽  
Online Communities ◽  
Strategic Behavior ◽  
Private Property ◽  
The Internet ◽  
Field System ◽  
Technical Features ◽  
Dynamic Interplay ◽  
Enormous Success

78 Fordham Law Review 2799 (2010)The Internet is a semicommons. Private property in servers and network links coexists with a shared communications platform. This distinctive combination both explains the Internet's enormous success and illustrates some of its recurring problems.Building on Henry Smith's theory of the semicommons in the medieval open-field system, this essay explains how the dynamic interplay between private and common uses on the Internet enables it to facilitate worldwide sharing and collaboration without collapsing under the strain of misuse. It shows that key technical features of the Internet, such as its layering of protocols and the Web's division into distinct "sites," respond to the characteristic threats of strategic behavior in a semicommons. An extended case study of the Usenet distributed messaging system shows that not all semicommons on the Internet succeed; the continued success of the Internet depends on our ability to create strong online communities that can manage and defend the infrastructure on which they rely. Private and common both have essential roles to play in that task, a lesson recognized in David Post's and Jonathan Zittrain's recent books on the Internet.

scholarly journals Digital Twin for Designing and Reconfiguring Human–Robot Collaborative Assembly Lines

2021 ◽  
Vol 11 (10) ◽  
pp. 4620
Author(s):  
Niki Kousi ◽  
Christos Gkournelos ◽  
Sotiris Aivaliotis ◽  
Konstantinos Lotsaris ◽  
Angelos Christos Bavelos ◽  
...  
Keyword(s):  
Production System ◽  
Assembly Lines ◽  
Flexible Assembly ◽  
Digital Twin ◽  
Collaborative Assembly ◽  
Geometrical Information ◽  
Line Level ◽  
Dual Arm ◽  
Different Levels

This paper discusses a digital twin-based approach for designing and redesigning flexible assembly systems. The digital twin allows modeling the parameters of the production system at different levels including assembly process, production station, and line level. The approach allows dynamically updating the digital twin in runtime, synthesizing data from multiple 2D–3D sensors in order to have up-to-date information about the actual production process. The model integrates both geometrical information and semantics. The model is used in combination with an artificial intelligence logic in order to derive alternative configurations of the production system. The overall approach is discussed with the help of a case study coming from the automotive industry. The case study introduces a production system integrating humans and autonomous mobile dual arm workers.

Dealing with Misselling: Impact of Behavioural Interventions on Insurance Agents

2021 ◽  
pp. 263145412098771
Author(s):  
Biju Dominic ◽  
Reshmi
Keyword(s):  
Control Mechanism ◽  
Self Control ◽  
Insurance Company ◽  
Ethical Challenges ◽  
Behavioural Interventions ◽  
Insurance Agents ◽  
Insurance Policies ◽  
Ethical Violations ◽  
Long Run

This case study is about misselling of insurance policies and associated ethical challenges in a leading insurance company. Pro-organisational ethical violations mostly remain unnoticed and are often protected by implausible explanations. In the long run, persistent rationalisation makes malpractices a norm. The present work describes the interventions applied by a consulting firm to bring behavioural integrity. The consulting firm found that socialisation, rationalisation and institutionalisation considerably influenced people’s behaviour at the workplace and normalised unethical behaviour of insurance agents. It architected the behaviour of salespeople by specifically designed interventions through self-control mechanism and nudges. These interventions developed integrity in employees and reduced the number of cautions, warnings and terminations.

scholarly journals Artefacts, practices and pedagogies: teaching writing in English in the NAPLAN era

2021 ◽  
Author(s):  
Susanne Gannon ◽  
Jennifer Dove
Keyword(s):  
Secondary Schools ◽  
English Teachers ◽  
Teaching Writing ◽  
Pedagogical Practices ◽  
Deep Dive ◽  
Geographically Dispersed ◽  
English Classes ◽  
Novel Method ◽  
Teaching Of Writing

AbstractIn secondary schools, English teachers are often made responsible for writing results in national testing. Yet there have been few studies that focussed on this key group, or on how pedagogical practices have been impacted in the teaching of writing in their classrooms. This study investigated practices of English teachers in four secondary schools across different states, systems and regions. It developed a novel method of case study at a distance that required no classroom presence or school visits for the researchers and allowed a multi-sited and geographically dispersed design. Teachers were invited to select classroom artefacts pertaining to the teaching of writing in their English classes, compile individualised e-portfolios and reflect on these items in writing and in digitally conducted interviews, as well as elaborating on their broader philosophies and feelings about the teaching of writing. Despite and sometimes because of NAPLAN, these teachers held strong views on explicit teaching of elements of writing, but approached these in different ways. The artefacts that they created animated their teaching practices, connected them to their students and their subject, suggested both the pressure of externally driven homogenising approaches to writing and the creative individualised responses of skilled teachers within their unique contexts. In addition to providing granular detail about pedagogical practices in the teaching of writing in the NAPLAN era, the contribution of this paper lies in its methodological adaptation of case study at a distance through teacher-curated artefact portfolios that enabled a deep dive into individual teachers’ practices.

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