Constructive Geometry in Three Dimensions for Computer-Aided Design

1982 ◽  
Vol 104 (4) ◽  
pp. 813-816
Author(s):  
R. J. Sharpe ◽  
P. J. Thomas ◽  
R. W. Thorne
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Design System ◽  
Maintenance Costs ◽  
Cad System ◽  
Construction Techniques ◽  
Computer Aided ◽  
Aided Design

Three dimensional construction techniques are described along with the detailed description of several derivations. The resultant algorithms allow construction of points, lines, and conics directly in 3-space. These pieces of geometry are constructed relative to existing lines, conics, and splines which are represented as parametric rational cubics. The generality of these algorithms allows a single routine to handle construction relative to all curve types in the system. This characteristic reduces the amount of code and thus the implementation and maintenance costs of the CAD system. These techniques are being incorporated into a Computer-Aided Design system.

SAMMTB: A Computer Aided Design Tool for Ergonomists

1986 ◽  
Vol 30 (7) ◽  
pp. 694-698 ◽  
Author(s):  
Keith Case ◽  
J. Mark Porter ◽  
Maurice C. Bonney
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Design Tool ◽  
Three Dimensions ◽  
Design System ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Computer Aided ◽  
Aided Design ◽  
Machine Interaction

Sammie (System for Aiding Man-Machine Interaction Evaluation) is a Computer Aided Design system which provides facilities for ergonomics/human factors evaluation at the earliest stage in the design process. Workplaces, for example the interior of a vehicle or a supermarket checkout, are modelled in three dimensions and presented on a computer graphics screen. A range of techniques are available for interactively modifying the design and for an ergonomie evaluation at each stage by the use of a three-dimensional model of the human operator. This paper describes the facilities available and illustrates the system's usefulness by reference to examples taken from recent design assignments.

scholarly journals Development of integrated intelligent computer-aided design system for mechanical power-transmitting mechanism design

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401771038 ◽  
Author(s):  
Isad Saric ◽  
Adil Muminovic ◽  
Mirsad Colic ◽  
Senad Rahimic
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Numerical Control ◽  
Numerical Control ◽  
Mechanical Power ◽  
Design System ◽  
Computer Aided ◽  
Aided Design ◽  
Intelligent Computer

This article presents architecture of integrated intelligent computer-aided design system for designing mechanical power-transmitting mechanisms (IICADkmps). The system has been developed in C# program environment with the aim of automatising the design process. This article presents a modern, automated approach to design. Developed kmps modules for calculation of geometrical and design characteristics of mechanical power-transmitting mechanisms are described. Three-dimensional geometrical parameter modelling of mechanical power-transmitting mechanisms was performed in the computer-aided design/computer-aided manufacturing/computer-aided engineering system CATIA V5. The connection between kmps calculation modules and CATIA V5 modelling system was established through initial three-dimensional models – templates. The outputs from the developed IICADkmps system generated final three-dimensional virtual models of mechanical power-transmitting mechanisms. Testing of the developed IICADkmps system was performed on friction, belt, cogged (spur and bevel gears) and chain transmitting mechanisms. Also, connection of the developed IICADkmps system with a device for rapid prototyping and computer numerical control machines was made for the purpose of additional testing and verification of practical use. Physical prototypes of designed characteristic elements of mechanical power-transmitting mechanisms were manufactured. The selected test three-dimensional virtual prototypes, obtained as an output from the developed IICADkmps system, were manufactured on the device for rapid prototyping (three-dimensional colour printer Spectrum Z510) and computer numerical control machines. Finally, at the end of the article, conclusions and suggested possible directions of further research, based on theoretical and practical research results, are presented.

A Quantitive Analysis on Virtual Reality-Based Computer Aided Design System Interfaces

Manufacturing ◽  
2002 ◽  
Author(s):  
Chi-Cheng Chu ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Computer Aided Design ◽  
Effective Interaction ◽  
Design System ◽  
Human Beings ◽  
Cad System ◽  
Computer Aided ◽  
Interaction Approach ◽  
Aided Design

In this paper, a series of interface tests on interaction approach for the generation of geometric shape designs via multi-sensory user interface of a Virtual Reality (VR) based System is presented. The goal of these interface tests is to identify an effective user interface for VR based Computer-Aided Design (CAD) system. The intuitiveness of the VR based interaction approach arises from the use of natural hand movements/gestures, and voice commands that emulate the way in which human beings discuss geometric shapes in reality. The focus of this paper is on determining a set of effective interaction approaches by using the combinations of auditory, tactile, and visual sensory modalities to accomplish typical CAD tasks. In order to evaluate the proposed interaction approach, a prototypical VR-CAD system is implemented. A series of interface tests were performed on the prototypical systems to determine the relative efficiency of a set of potential interaction approach with respect to specific fundamental design tasks. The interface test and its results are presented in this paper.

Design of Longitudinal Beam Layout on a Curved Shell Based on the Production-Oriented Design Concept

1994 ◽  
Vol 10 (04) ◽  
pp. 217-222
Author(s):  
Kohji Honda ◽  
Noriyuki Tabushi
Keyword(s):  
Crude Oil ◽  
Computer Aided Design ◽  
Design Method ◽  
Three Dimensional ◽  
Design System ◽  
Two Dimensional ◽  
Skilled Workers ◽  
System A ◽  
Computer Aided ◽  
Aided Design

A VLCC (very large crude oil carrier) has approximately 1000 curved longitudinal beams, many of which have three-dimensional complicated curvatures. Due to the shortage of highly skilled workers and the need to keep costs down, production and structural designers have worked to reduce the number of such beams. In order to meet the requirements of production, the authors' company has attempted several design approaches for the longitudinal beam layout to reduce the number of beams that have complicated curvature. Recently, through the application of a computer-aided design system, which has been improved for shipbuilding based on the Calma's system, a new design method for the longitudinal beam layout has been successfully developed. A significant number of beams with a twisted configuration have been eliminated and replaced with beams of simpler, two-dimensional shapes. This paper shows the transition of these design approaches, and the application of the new design to building a VLCC.

A Quantitative Analysis on Virtual Reality-Based Computer Aided Design System Interfaces

2002 ◽  
Vol 2 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Chi-Cheng Chu ◽  
Jianzhong Mo ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Computer Aided Design ◽  
Potential Interaction ◽  
Design System ◽  
Human Beings ◽  
Cad System ◽  
Computer Aided ◽  
Interaction Approach ◽  
Aided Design

In this paper, a series of interface tests on interaction approach for the generation of geometric shape designs via multi-sensory user interface of a Virtual Reality (VR) based System is presented. The goal of these interface tests is to identify an effective user interface for VR based Computer-Aided Design (CAD) system. The intuitiveness of the VR based interaction approach arises from the use of natural hand movements/gestures, and voice commands that emulate the way in which human beings discuss geometric shapes in reality. In order to evaluate the proposed interaction approach, a prototypical VR-CAD system is implemented. A series of interface tests were performed on the prototypical systems to determine the relative efficiency of a set of potential interaction approach with respect to specific fundamental design tasks. The interface test and its results are presented in this paper.

Study and Implementation of the Computer Aided Design System of the Rolling Bearing

2011 ◽  
Vol 338 ◽  
pp. 339-342
Author(s):  
Jing Jing Huang ◽  
Jian Xia Li
Keyword(s):  
Computer Aided Design ◽  
Rolling Bearing ◽  
Design System ◽  
Design Quality ◽  
Cad System ◽  
Computer Aided ◽  
Solid Edge ◽  
Aided Design ◽  
Developing Method

The rolling bearing is a kind of common standard parts. The developing method of CAD system of the rolling bearing based on Solid Edge which is used VB as the developing tool is introduced in this paper. This system can realize the design and check of the rolling bearing automatically, realize the integration of the design and drawing, and improve the design quality and efficiency.

scholarly journals Clinical trial of a computer-aided system for orthopaedic shoe upper design

1991 ◽  
Vol 15 (1) ◽  
pp. 11-17 ◽  
Author(s):  
M. Lord ◽  
J. Foulston
Keyword(s):  
Clinical Trial ◽  
Computer Aided Design ◽  
Design System ◽  
Foot Deformities ◽  
Diabetic Patients ◽  
3D Image ◽  
Cad System ◽  
Shoe Design ◽  
Computer Aided ◽  
Aided Design

A trial has been conducted to produce the uppers for orthopaedic shoes using an existing commercial computer-aided design system. The aims of the trial were to confirm that a CAD system developed for the volume shoe trade (Shoemaster from Clarks Shoes) could be used for the upper design of orthopaedic shoes and to assess the contribution of professional shoe design on cosmesis and acceptability of these shoes. A small number of adult diabetic patients and children with foot deformities were selected, all of who had previously been prescribed and issued with special shoes. The existing lasts for these patients were digitised, and new styles developed on the CAD system over a 3D image of the last. Pattern pieces were cut automatically and the uppers closed. Lasting was done as normal at the two collaborating orthopaedic companies and the shoes supplied to the patients. The CAD system proved successful in coping with orthopaedic last shapes and shoe requirements. Professional design produced fashionable and cosmetically-pleasing styles within the constraints imposed by the underlying medical conditions.

Three–Dimensional Computer Models of Man

1986 ◽  
Vol 30 (3) ◽  
pp. 216-220 ◽  
Author(s):  
Patricia L. Rothwell ◽  
Dianne T. Hickey
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Models ◽  
Design Methods ◽  
Three Dimensions ◽  
Workplace Design ◽  
Potential Problems ◽  
Computer Aided ◽  
Aided Design

To assess the merit of using computer-aided design to model man in three dimensions, many potential problems and advantages must be considered. This paper addresses two related issues. First, it outlines several problems associated with obtaining information on the topic and second, it suggests several ways in which computer man-modelling is superior to traditional workplace design methods.

scholarly journals COMPUTER AIDED DESIGN SYSTEM FOR SPACECRAFT ONBOARD NETWORKS

2018 ◽  
pp. 145-153 ◽  
Author(s):  
V. L. Olenev ◽  
I. Ya. Lavrovskaya ◽  
L. I. Kurbanov ◽  
I. L. Korobkov ◽  
Yu. E. Sheynin
Keyword(s):  
Network Design ◽  
Computer Aided Design ◽  
Local Area ◽  
Design System ◽  
Space Vehicles ◽  
Automated Generation ◽  
Cad System ◽  
Computer Aided ◽  
Network Operation ◽  
Aided Design

Modern spacecraft onboard networks consist of a large number of nodes which interact with each other via a communication network. SpaceWire is a new generation technology which is being integrated into new spacecraft systems. In order to check network operation on the early stages of network design it is reasonable to perform its software simulation. The paper provides an analysis of existing simulation tools for the on-board and local area networks. We overview the main abilities of the existing software and then propose the computer-aided design (CAD) system for SpaceWire onboard networks design and simulation - SANDS. This software will solve important tasks, which spacecraft developers face with during implementation of satellites and other space vehicles. SANDS system will support the full on-board network design and simulation flow, which begins from the network topology automated generation and finishes with getting the network structure, configuration and parameters setting, simulation results and statistics.

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