Using the Abstract Prototyping Technique in the Development of Design Support Systems

2001 ◽  
Author(s):  
E. Z. Opiyo ◽  
I. Horváth ◽  
J. S. M. Vergeest
Keyword(s):  
Computer Aided Design ◽  
Support Systems ◽  
Software Tools ◽  
Design Support ◽  
Computer Aided ◽  
Software Implementations ◽  
Computer Based ◽  
Support Software ◽  
Aided Design

Abstract In the process of development of Computer Aided Design (CAD) software tools, the expected functionality reappears in various different forms, for instance, as a collection of theories, methods, algorithms or as pilot implementations. Ensuring quality of these abstract software implementations can help assuring the acceptance of the functionality. The problem is that a formal methodology for assuring quality of all these abstract implementations is not available. As an attempt to deal with this challenge, we have developed a computer based pre-implementation testing methodology that has been named abstract prototyping. The exclusive feature of the abstract prototyping technique and the philosophy behind it is that it provides a framework for pre-implementation testing and for involving the representatives of various stakeholders in the development and testing of incidental implementations. We are using abstract prototyping as a framework for development and testing of abstract implementations of design support software tools, and it appears to be useful. It provides the developers with a methodology for exploring views of various stakeholders. It thus helps reduce the risk of developing poor design support software tools. In this paper we first review the problem and then briefly introduce the abstract prototyping concept and software tools. Afterwards, we focus on explaining how to use the abstract prototyping technique in the development and testing of design support software tools.

scholarly journals Influence of Sequential CAD/CAM Milling on the Fitting Accuracy of Titanium Three-Unit Fixed Dental Prostheses

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1401
Author(s):  
Doo-Bin Song ◽  
Man-So Han ◽  
Si-Chul Kim ◽  
Junyong Ahn ◽  
Yong-Woon Im ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Computer Aided Design ◽  
Dental Prostheses ◽  
Computer Aided ◽  
Cad Cam ◽  
Fixed Dental Prostheses ◽  
Gap Data ◽  
Aided Design ◽  
Fitting Accuracy

This study investigated the fitting accuracy of titanium alloy fixed dental prostheses (FDP) after sequential CAD/CAM (Computer Aided Design/Computer Aided Manufacturing) fabrication. A three-unit FDP model connecting mandibular second premolars and molars was prepared and scanned to fabricate titanium FDPs by CAD/CAM milling. A total of six FDPs were sequentially milled in one titanium alloy disk using a new set of burs every time (n = 4). The fitting accuracy of FDPs was mesiodistally evaluated by a silicone replica technique and the measurement was triplicated at four different locations: MO (marginal opening), MG (marginal gap), AG (axial gap), and OG (occlusal gap). Data were statistically analyzed using ANOVA and Tukey’s HSD test. The fitting accuracy of PMMA (polymethyl methacrylate) FDPs milled using the worn or new bur were evaluated by the same procedure (n = 6). The mean dimensions of titanium FDP for all measuring positions, except for AG, were significantly increased from the third milling. However, no difference was noted between the first FDP and the second FDP milled with the same set of burs. Severe edge chippings were observed in all milling burs. Detrimental effects of the worn burs on the fitting accuracy were demonstrated in the CAD/CAM-milled PMMA FDP. The results recommend proper changing frequency of cutting burs to achieve the quality of fit and predictable outcomes for dental CAD/CAM prostheses.

scholarly journals Kinematic Modeling and Simulation of Human Arm Reach

2021 ◽  
Author(s):  
Mehrdad Zafari
Keyword(s):  
Computer Aided Design ◽  
Kinematic Modeling ◽  
Repetitive Tasks ◽  
Human Arm ◽  
Computer Aided ◽  
Computer Based ◽  
Human Operators ◽  
Aided Design ◽  
Workspace Design ◽  
Significant Attention

Modeling the human arm and calculation of the human arm reach are important for designing workspaces. An appropriate workspace design would reduce musculoskeletal disorders and wrist injuries in repetitive tasks. Among different human arm workspace designs and reach calculations, computer-based methods have recently attracted significant attention. This is because conventional experimental methods do not provide sufficient flexibility for interactive design modifications and integration of different aspects for workspace design. Despite advances in computer-aided design, many computer-based methods still rely on mock-ups and experimental set-ups. In this work, a computer-aided method is investigated for predicting the human arm reach. The kinematic modeling convention of Denavit-Hertenberg is adopted for formulating the reach. Simulation results are provided to demonstrate the effectiveness of the method. The methodology enables visualization of the reach volume of the human arm and could be easily adjusted for different human operators.

scholarly journals Kinematic Modeling and Simulation of Human Arm Reach

2021 ◽  
Author(s):  
Mehrdad Zafari
Keyword(s):  
Computer Aided Design ◽  
Kinematic Modeling ◽  
Repetitive Tasks ◽  
Human Arm ◽  
Computer Aided ◽  
Computer Based ◽  
Human Operators ◽  
Aided Design ◽  
Workspace Design ◽  
Significant Attention

Modeling the human arm and calculation of the human arm reach are important for designing workspaces. An appropriate workspace design would reduce musculoskeletal disorders and wrist injuries in repetitive tasks. Among different human arm workspace designs and reach calculations, computer-based methods have recently attracted significant attention. This is because conventional experimental methods do not provide sufficient flexibility for interactive design modifications and integration of different aspects for workspace design. Despite advances in computer-aided design, many computer-based methods still rely on mock-ups and experimental set-ups. In this work, a computer-aided method is investigated for predicting the human arm reach. The kinematic modeling convention of Denavit-Hertenberg is adopted for formulating the reach. Simulation results are provided to demonstrate the effectiveness of the method. The methodology enables visualization of the reach volume of the human arm and could be easily adjusted for different human operators.

Computer-Aided Laboratory Work to “Mechanism and Machine Science” Course

2007 ◽  
Author(s):  
Valentina V. Kuzlyakina ◽  
Marina V. Nagaeva
Keyword(s):  
Computer Aided Design ◽  
Laboratory Work ◽  
State University ◽  
Design Elements ◽  
Computer Aided ◽  
Teachers And Students ◽  
Structure Editor ◽  
Computer Based ◽  
Visual Structure ◽  
Aided Design

Laboratory work is an important element in engineering training, which should correspond to up-to-date tendencies in computer-based technologies in design, production, maintenance and preserving mechanisms. Computer-based laboratory work consists of 16 assignments. Seven assignments are carried out on laboratory stands, the remainder are provided on PC, using programs like “Visual Structure Editor”, “DYNAMO”, “APM Win Machine”. The system Visual Structure Editor (VSE) is designed by specialists of “Machine Mechanics and Computer-Aided Design” department, of the Maritime State University named after adm.G.I.NEVELSKOY, Vladivostok, under the direction of prof. Valentina V. Kuzlyakina. The system APM (Automated Projecting of Mechanism) is designed by the research-and-production centre “APM” under the direction of prof.V.Shelofast, from the city of Korolyov, Moscow area. These systems are multifunctional. They allow project different mechanical systems at the stage of structural and parametrical synthesis, carry out strength calculations and design elements of machines and mechanisms. They are good in operation. Teachers and students easily master the systems. Laboratory works with computer support allow students to pass from a concrete object to modeling on a PC, and to solve complex engineering tasks during the education process.

Representing analogies to influence fixation and creativity: A study comparing computer-aided design, photographs, and sketches

2015 ◽  
Vol 29 (2) ◽  
pp. 161-171 ◽  
Author(s):  
Olufunmilola Atilola ◽  
Julie Linsey
Keyword(s):  
Computer Aided Design ◽  
Idea Generation ◽  
Generation Process ◽  
Critical Question ◽  
Design Fixation ◽  
Design Concepts ◽  
Computer Aided ◽  
Aided Design ◽  
Effective Design

AbstractMany tools are being developed to assist designers in retrieving analogies. One critical question these designers face is how these analogues should be represented in order to minimize design fixation and maximize idea generation. To address this question, an experiment is presented that compares various representations' influence on creativity and design fixation. This experiment presents an effective example (analogue) as computer-aided design (CAD), sketch, or photograph representations. We found that all representations induced fixation, and the degree of fixation did not vary significantly. We also found that CAD representations encourage engineering designers to identify and copy the key effective features of the example. CAD and photo representations also produced a higher quality of design concepts. Results from this experiment offer insights into how these various representations may be used in examples during idea generation; CAD representations appear to offer the greatest advantages during the idea generation process. The results from this experiment also indicate that analogical databases of effective design examples should include CAD and photolike images of the analogue rather than sketches.

scholarly journals Pushing the Design Envelope with CAE

1998 ◽  
Vol 120 (11) ◽  
pp. 66-71 ◽  
Author(s):  
Mar Halpern
Keyword(s):  
Computer Aided Design ◽  
Electronics Packaging ◽  
General Purpose ◽  
Element Analysis ◽  
Packaging Design ◽  
Computer Aided ◽  
Aided Design ◽  
Cae Simulation ◽  
Disc Drive

This article examines the growing usefulness of computer-aided engineering (CAE) programs for the design of electronics packaging. CAE combined with expert interpretation, can help manufacturers quickly satisfy demand for increasingly small yet reliable products. Currently, three classes of software specifically support electronics packaging design: integrated computer-aided design (CAD) CAE software, general-purpose CAE software, and specialty CAE software solutions. The integrated CAE software emphasizes automatic creation and updating of finite-element-analysis (FEA) models based on CAD geometry. The effectiveness of this associativity between CAD and FEA depends on the product behavior to be evaluated and the quality of implementation. CAE simulation can calculate the maximum acceptable loads on pins, as well as the vibration characteristics of components. Solids-based CAD helps detect interference problems across components, as in these exploded views of a disc drive and a headset. While several general-purpose CAE suppliers permit engineers to build customized environments for automating model creation, specialty suppliers such as Pacific Numerix deliver the specific automated capabilities and connector libraries.

scholarly journals AUTOMATION OF STRUCTURAL AND PARAMETRIC ANALYSIS OF PROJECT DECISIONS AND TRAINING OF THE DESIGNER OF MACHINE-BUILDING PRODUCTS WITH CAD COMPASS

2019 ◽  
Vol 2018 (2) ◽  
pp. 26-33
Author(s):  
Александр Афанасьев ◽  
Afanasyev Afanasyev ◽  
Сергей Бригаднов ◽  
Sergey Brigadnov
Keyword(s):  
Adaptive Learning ◽  
Computer Aided Design ◽  
Parametric Analysis ◽  
Three Dimensional ◽  
Machine Building ◽  
Building Products ◽  
Computer Aided ◽  
Design Solutions ◽  
Aided Design

The actual task in the field of computer-aided design of machine-building objects is to increase the level of automation of structural-parametric analysis of design solutions due to the repetition of their use, reducing the number of design operations and ensuring the corresponding competencies of designers. Developed methods and algorithms should ensure the acquisition of the necessary competencies for the designer for successful project activities in the field of computer-aided design, increasing the effectiveness of training. The system of analysis of design solutions should improve the quality of design solutions implemented in CAD KOMPAS-3D. In this paper, an overview of methods, systems and tools for analyzing design solutions implemented in the CAD-3D environment. The main features of such systems are described, their main disadvantages are identified: the lack of functions for determining non-optimal sequences of design operations, the inability to automatically rebuild a three-dimensional model of a machine-building product on the basis of analysis of the design model tree. A complex system for the analysis of project solutions and the training of a designer was developed and implemented, based on methods, models and algorithms for analysis and adaptive learning. The results of a computational experiment are presented, on the basis of which it can be concluded that the use of developed software enhances the efficiency and quality of the designer's training in the processes of constructing three-dimensional solid-state machine-building products in CAD KOMPAS-3D.

Assessing Computer-Aided Design Skills

2018 ◽  
pp. 7382-7391
Author(s):  
Yi Lin Wong ◽  
Kin Wai Michael Siu
Keyword(s):  
Hong Kong ◽  
Problem Solving ◽  
Computer Aided Design ◽  
Computer Skills ◽  
High Ability ◽  
Computer Aided ◽  
Current Assessment ◽  
Design Skills ◽  
Aided Design

This chapter discusses the difficulties of CAD assessment through examining and reviewing existing CAD examination questions in Hong Kong. Based on the review, limitations of the current assessment are highlighted. It is argued that the existing method is inconsistent with the problem solving nature of the software and is unable to assess students with high ability and advanced drawing skills. Recommendation and improvement directions are suggested in the chapter to optimize the quality of assessment. Other subjects which also involve assessment of computer skills and design may also benefit from the recommendations.

Integration of Measurements and Maneuvering Technologies Used to Modify Caisson

1993 ◽  
Vol 9 (03) ◽  
pp. 181-187
Author(s):  
Joseph Krulikowski ◽  
Peter Sparacino ◽  
Anthony Giordano
Keyword(s):  
Computer Aided Design ◽  
Design System ◽  
Accurate Data ◽  
Design Information ◽  
Large Structures ◽  
Final Assembly ◽  
Computer Aided ◽  
Computer Based ◽  
Dry Dock ◽  
Aided Design

The modification of the caisson in a dry dock is in many ways more difficult than conventional ship modifications. This is because of the accuracy required, location of the measurements, and the size of the structure. The development of computer-based multi-headed electronic theodolite systems made it possible to extract accurate data on large structures. These data were formatted so they could be input directly into a computer-aided design system. The multi-headed electronic theodolite system was used to transfer new design information directly to the structure. The caisson structure was modified and moved safely into position with the aid of a water castor system for final assembly. Final dimension checks verified the accuracy of the system.

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