Effective Teaching of Computer Integrated Mechanism Analysis and Design

2005 ◽  
Author(s):  
Harry H. Cheng ◽  
Matt Campbell
Keyword(s):  
Effective Teaching ◽  
Mechanism Design ◽  
Computer Aided Design ◽  
Teaching Strategy ◽  
Mechanism Analysis ◽  
Analysis And Design ◽  
Computer Aided ◽  
Course Material ◽  
High Level ◽  
Aided Design

An effective teaching strategy that integrates computer aided design and programming into a course on mechanism analysis and design is presented. Mechanism analysis is enhanced when coupled with basic programming that allows students to find solutions to more complex systems than would otherwise be possible. Web-based distance learning is part of the class and students also learn how to create these kinds of materials themselves. Students can better understand the course material through an integrated computing environment. By solving mechanism design problems in C/C++, the programming skills gained in the course are widely applicable in other areas of engineering. Ch, a C/C++ interpreter, is used to incorporate programming and mechanism design because of its high-level numerical and graphical plotting capabilities, scripting capability, and a mechanism toolkit with easy and quick animation. A student project is given as an example to show how computers are integrated for effective learning. This teaching strategy has been actively used at UC Davis for several years in an undergraduate course in computer-aided mechanism design.

Computer-Aided Mechanism Design: Now and the Future

1995 ◽  
Vol 117 (B) ◽  
pp. 93-100 ◽  
Author(s):  
A. G. Erdman
Keyword(s):  
Mechanism Design ◽  
Computer Aided Design ◽  
Current Status ◽  
Current Trends ◽  
Linkage Design ◽  
Computer Aided ◽  
The Future ◽  
Aided Design

The current status of computer-aided design of mechanisms is reviewed. The available software is described and several industrial examples are presented to illustrate current trends in the field of linkage design and analysis. Future strategies and CAD environments are also discussed.

scholarly journals Modelling of Nonuniform RC Structures for Computer Aided Design

1994 ◽  
Vol 16 (2) ◽  
pp. 89-95
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Simple Model ◽  
Computer Aided Design ◽  
Rc Structures ◽  
Analysis And Design ◽  
Hyperbolic Sine ◽  
Hyperbolic Cosine ◽  
Computer Aided Analysis ◽  
Computer Aided ◽  
Aided Design

A simple model for nonuniform distributed RC structures is presented. The model consists of three passive elements only and can be used for modelling nonuniform distributed RC structures involving exponential, hyperbolic sine squared, hyperbolic cosine squared and square taper geometries. The model can be easily implemented for computer-aided analysis and design of circuits and systems comprising nonuniform distributed RC structures.

A Dual Environment for 3D Modeling With User-Defined Freeform Features

2009 ◽  
Vol 9 (2) ◽  
Author(s):  
Thomas R. Langerak ◽  
Joris S. M. Vergeest
Keyword(s):  
3D Modeling ◽  
Computer Aided Design ◽  
Target Surface ◽  
Feature Modeling ◽  
Dynamic Feature ◽  
Design Features ◽  
Computer Aided ◽  
Definition Of ◽  
High Level ◽  
Aided Design

Modeling with freeform features has become the standard in computer-aided design. Features offer a high-level approach to modeling shapes. However, in most commercial modeling packages, only a static set of freeform features is available. A new method for user-driven feature definition is presented, as well as a method to instantiate these user-defined features on a target surface. We propose the concept of a dual environment, in which the definition of a feature is maintained parallel to its instance on a target surface. This dual environment enables dynamic feature modeling, in which the user is able to change the definition of instantiated features on-the-fly.

Mechanical/Naval Design of an Underwater Remotely Operated Vehicle (ROV) for Surveillance and Inspection of Port Facilities

2007 ◽  
Author(s):  
Juan A. Rami´rez ◽  
Rafael E. Va´squez ◽  
Luis B. Gutie´rrez ◽  
Diego A. Flo´rez
Keyword(s):  
Visual Information ◽  
Computer Aided Design ◽  
Degrees Of Freedom ◽  
Remotely Operated Vehicle ◽  
Port Facilities ◽  
Computer Aided ◽  
Computational Fluid Dynamics Cfd ◽  
High Level ◽  
Aided Design ◽  
And Control

This paper presents the mechanical/naval design process of an underwater remotely operated vehicle (ROV), required to obtain reliable visual information, used for surveillance and maintenance of ship shells and underwater structures of Colombian port facilities. The design was divided into four main subsystems: mechanical/naval, hardware, software and guidance, navigation and control. The most relevant design constraints were evaluated considering environmental conditions, dimensional restrictions, hydrostatics, hydrodynamics, degrees of freedom and the availability of instrumentation and control hardware. The mechanical/naval design was performed through an iterative process by using computational tools, including Computer Aided Design CAD, Computer Aided Engineering CAE, Computational Fluid Dynamics CFD and a high level programming environment. The obtained design ensures that the reliable operation of the robot will be achieved by using a consistent construction process. The new ROV constitutes an innovative product in Colombia, and it will be used for surveillance and oceanographic research tasks.

Techniques for the Development of an Audiographic Teleconferencing Course

1992 ◽  
Author(s):  
Anthony Hotchkiss
Keyword(s):  
Distance Education ◽  
Computer Aided Design ◽  
Visual Material ◽  
University Of Wisconsin ◽  
Computer Aided ◽  
Course Material ◽  
Aided Design ◽  
The University

Abstract The development and preparation of course material for audiographic teleconferencing, a form of distance education, is discussed. The Group Teleconferencing System (GTCS), used at the University of Wisconsin-Madison, is described. GTCS allows visual material (slides) to be displayed and annotated interactively, and some techniques for the generation and presentation of the slides are suggested, using a computer-aided-design course as an example.

scholarly journals STEP File Analyzer Software

2017 ◽  
Vol 122 ◽  
Author(s):  
Robert Lipman
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
3D Visualization ◽  
Software Tool ◽  
Smart Manufacturing ◽  
Product Model ◽  
Engineering Software ◽  
Computer Aided ◽  
High Level ◽  
Aided Design

The STEP File Analyzer is a software tool that generates a spreadsheet or a set of CSV (comma-separated value) files from a STEP (ISO 10303 –STandard for Exchange of Product model data) Part 21 file. STEP files are used to represent product and manufacturing information (PMI) and for data exchange and interoperability between Computer-Aided Design (CAD), Manufacturing (CAM), Analysis (CAE), and Inspection (CMM) software related to the smart manufacturing digital thread. STEP is also used for the long-term archiving and retrieval of product data. A spreadsheet simplifies inspecting information from the STEP file at an entity and attribute level. Typical STEP file viewers show a 3D visualization of the part or model represented by the STEP file. The viewers usually have a high-level hierarchical display of the information in the STEP file where the user can drill down to individual attributes of parts. However, there is no way to view all of the actual STEP entities and their attributes at once. The STEP File Analyzer provides this capability by creating a spreadsheet from the STEP file. The STEP File Analyzer also generates reports for PMI Representation, PMI Presentation, and Validation Properties based on Recommended Practices defined by the CAx Implementor Forum (CAx-IF) [5]. The objective of the CAx-IF is to advance CAx (mainly Computer-Aided Design and Engineering) software system STEP translator development and to ensure that user requirements for interoperability are satisfied.

Fitting and Manipulating Freeform Shapes Using Templates

2004 ◽  
Vol 5 (2) ◽  
pp. 86-94 ◽  
Author(s):  
Y. Song ◽  
J. S. M. Vergeest ◽  
W. F. Bronsvoort
Keyword(s):  
Computer Graphics ◽  
Computer Aided Design ◽  
Computation Time ◽  
Shape Modification ◽  
Deformable Templates ◽  
Computer Aided ◽  
Intrinsic Shape ◽  
High Level ◽  
Aided Design ◽  
Further Development

Finding effective and efficient tools for complex freeform shape modification continues to be a challenging problem in computer graphics and computer-aided design. Although current approaches give reasonable results, their computation time and complexity often prevent their further development in more complex cases, especially in reusing an existing design. In this paper, for a better control of existing freeform shapes, deformable freeform feature templates are introduced. By the advantage of a small number of intrinsic parameters, a given freeform shape can be quickly approximated by one of the deformable templates. The deformable templates are further developed to track and match complex freeform shapes, resulting in extendable templates. With mappings, the original shape and the approximated template are associated. Thus, further shape manipulations can be conducted effectively using high-level intrinsic shape parameters. Experiments were carried out to verify the proposed algorithms. It is also described how the matching and manipulating techniques can be applied in computer graphics and computer-aided design applications.

Computer-Aided Mechanism Design: Now and the Future

1995 ◽  
Vol 117 (B) ◽  
pp. 93-100 ◽  
Author(s):  
A. G. Erdman
Keyword(s):  
Mechanism Design ◽  
Computer Aided Design ◽  
Current Status ◽  
Current Trends ◽  
Linkage Design ◽  
Computer Aided ◽  
The Future ◽  
Aided Design

The current status of computer-aided design of mechanisms is reviewed. The available software is described and several industrial examples are presented to illustrate current trends in the field of linkage design and analysis. Future strategies and CAD environments are also discussed.

scholarly journals Three-Level Inverter Control Techniques: Design, Analysis, and Comparisons

2021 ◽  
Vol 27 (3) ◽  
pp. 26-37
Author(s):  
Dan Selisteanu ◽  
Monica Roman ◽  
Lucian Mandache ◽  
Razvan Prejbeanu ◽  
Sergiu Ivanov ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Asynchronous Motor ◽  
Quality Criteria ◽  
Operating Conditions ◽  
Design Tools ◽  
Analysis And Design ◽  
Control Techniques ◽  
Linear Load ◽  
Computer Aided ◽  
Aided Design

This work addresses the analysis and design of various Proportional-Integral-Derivative (PID) control techniques for a three-level inverter. Multilevel power converters are modern and basic elements of high-voltage electric drive and power supply systems. By using simulations and specific computer-aided design tools, the overall functional characteristics of multilevel converters, as well as the electrical demands of the components, can be accurately assessed to obtain an appropriate control solution. An innovative and detailed software model of a three-level inverter is developed and then used for the implementation of control techniques. Several tuning methods are used to tune PID controllers for two specific cases: the multilevel inverter with a linear load and with an asynchronous motor load, respectively. A detailed analysis and comparisons of the quality criteria and control performance are achieved. This analysis shows that the choice of controller type depends on the inverter load. For the linear load, proper results are obtained with a PI Nichols-tuned controller, and for the asynchronous load, with a PI controller tuned via a modified Hokushin method. The computer-aided design tools can be further used for the simulation of the equipment in various operating conditions, normal and fault, following all functional parameters.

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