Computer Aided Design Of Garments Using Digitized Three-Dimensional Surfaces

1992 ◽  
Vol 206 (3) ◽  
pp. 199-206 ◽  
Author(s):  
J McCartney ◽  
B K Hinds
Keyword(s):  
Computer Aided Design ◽  
Standard Form ◽  
Three Dimensional ◽  
Data Entry ◽  
General Purpose ◽  
Computer Aided ◽  
Offset Surfaces ◽  
Design Systems ◽  
Aided Design

In the apparel field, there is the problem of creating a design with respect to an underlying standard form. Instead of applying general-purpose three-dimensional computer aided design systems to such tasks it is proposed that design can be carried more efficiently with bespoke design systems. These can be targeted to deal with the problems of accurately defining the offset surfaces which comprise the garment. Such a system is introduced and the methods of data entry are discussed. Position on the three-dimensional form is determined using a digitizer tablet and fit with respect to the form is specified by an offset dimension. It is shown that complex garment pieces with variable fit can be quickly specified within the system.

The Dynamic Modeling of Flexible Spatial Machine Systems With Clearance Connections

1987 ◽  
Vol 109 (1) ◽  
pp. 87-94 ◽  
Author(s):  
S. Dubowsky ◽  
J. F. Deck ◽  
H. Costello
Keyword(s):  
Finite Element ◽  
Computer Aided Design ◽  
High Performance ◽  
Three Dimensional ◽  
Matrix Modeling ◽  
Computer Aided ◽  
Modeling Techniques ◽  
Design Systems ◽  
Machine Systems ◽  
Aided Design

An effective method is presented for modeling the full three-dimensional dynamics of high performance spatial machine systems, including the vibrations of their links, supporting structure and enclosures, and impacts in their connection clearances. The method combines four-by-four matrix modeling techniques with finite-element techniques. The system’s elements can be described in rich detail, including detailed models of the internal structure of the connections, yet the dynamic calculations are performed efficiently. The method is formulated for implementation on computer-aided design systems. Examples are presented.

Designing chips that work

1992 ◽  
Vol 339 (1652) ◽  
pp. 3-19 ◽  
Keyword(s):  
Integrated Circuits ◽  
Computer Aided Design ◽  
Theoretical Work ◽  
General Purpose ◽  
Unusual Combination ◽  
Computer Aided ◽  
Design Systems ◽  
Programming Skills ◽  
Mathematical Techniques ◽  
Aided Design

The complexity of integrated circuits continues to grow, and chips with over 10 8 transistors will be in widespread use by the late 1990s. These chips will combine general purpose processors with subsystems for communications and other specialized tasks. They will be far too complex for the design to be tested, and manufacturing volumes will be far too high for the design to be wrong! Mathematical techniques have already been applied to the design of parts of VLSI chips. Most of this work is experimental, and requires an unusual combination of engineering, mathematical and programming skills. Sometimes new theoretical work is needed, and specialized tools may have to be constructed. Despite these difficulties, mathematical techniques are playing an important role in the design of microprocessors at Inmos, and techniques suitable for incorporation in standard computer-aided design systems are emerging.

scholarly journals Automatized Evaluation of Students’ CAD Models

2021 ◽  
Vol 11 (4) ◽  
pp. 145
Author(s):  
Nenad Bojcetic ◽  
Filip Valjak ◽  
Dragan Zezelj ◽  
Tomislav Martinec
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Application ◽  
Test Cases ◽  
Cad Model ◽  
Computer Solution ◽  
3D Cad ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.

Determination of the Workspace of a Three-Degrees-of-Freedom Parallel Manipulator Using a Three-Dimensional Computer-Aided-Design Software Package and the Concept of Virtual Chains1

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Andrew Johnson ◽  
Xianwen Kong ◽  
James Ritchie
Keyword(s):  
Computer Aided Design ◽  
Parallel Manipulator ◽  
Degrees Of Freedom ◽  
Graphical Representation ◽  
Three Dimensional ◽  
Parallel Manipulators ◽  
Workspace Analysis ◽  
Computer Aided ◽  
Aided Design

The determination of workspace is an essential step in the development of parallel manipulators. By extending the virtual-chain (VC) approach to the type synthesis of parallel manipulators, this technical brief proposes a VC approach to the workspace analysis of parallel manipulators. This method is first outlined before being illustrated by the production of a three-dimensional (3D) computer-aided-design (CAD) model of a 3-RPS parallel manipulator and evaluating it for the workspace of the manipulator. Here, R, P and S denote revolute, prismatic and spherical joints respectively. The VC represents the motion capability of moving platform of a manipulator and is shown to be very useful in the production of a graphical representation of the workspace. Using this approach, the link interferences and certain transmission indices can be easily taken into consideration in determining the workspace of a parallel manipulator.

Low-fidelity prototyping with simple collaborative tabletop computer-aided design systems

2018 ◽  
Vol 70 ◽  
pp. 307-315 ◽  
Author(s):  
Erdem Kaya ◽  
Sema Alacam ◽  
Yasin Findik ◽  
Selim Balcisoy
Keyword(s):  
Computer Aided Design ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design
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