A New Era for Mechanical CAD Time to Move Forward from Decades-Old Design JESSIE FRAZELLE
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Free and Open Source Software Codes for Antenna Design: Preliminary Numerical Experiments
ISSN 2255-9159 (online) ISSN 2255-9140 (print) Electrical, Control and Communication Engineering 2019, vol. 15, no. 2, pp. 88–95 doi: 10.2478/ecce-2019-0012 https://content.sciendo.com Free and Open Source Software Codes for Antenna Design: Preliminary Numerical Experiments Alessandro Fedeli* (Assistant Professor, University of Genoa, Genoa, Italy), Claudio Montecucco (Consultant, Atel Antennas s.r.l., Arquata Scrivia, Italy), Gian Luigi Gragnani (Associate Professor, University of Genoa, Genoa, Italy) Abstract – In both industrial and scientific frameworks, free and the natural choice when ethical concerns about science open source software codes create novel and interesting diffusion and reproducibility [2] are faced. opportunities in computational electromagnetics. One of the For these reasons, work has started, aiming to identify and possible applications, which usually requires a large set of numerical tests, is related to antenna design. Despite the well- evaluate possible open source programs that can be usefully known advantages offered by open source software, there are employed for the design of antennas and possibly other passive several critical points that restrict its practical application. First, electromagnetic devices such as, for example, filters, couplers, the knowledge of the open source programs is often limited. impedance adapters. The research also aims at finding software Second, by using open source packages it is sometimes not easy to that allows for the pre- and post-processing of data. obtain results with a high level of confidence, and to integrate open Furthermore, it has been decided to consider the possibility of source modules in the production workflow. In the paper, a discussion about open source programs for antenna design is easily integrating the design into the complete production and carried out. -
Reference Manual Ii
GiD The universal, adaptative and user friendly pre and postprocessing system for computer analysis in science and engineering Reference Manual ii Table of Contents Chapters Pag. 1 INTRODUCTION 1 1.1 What's GiD 1 1.2 GiD Manuals 1 2 GENERAL ASPECTS 3 2.1 GiD Basics 3 2.2 Invoking GiD 4 2.2.1 First start 4 2.2.2 Command line flags 5 2.2.3 Settings 6 2.3 User Interface 7 2.3.1 Top menu 8 2.3.2 Toolbars 8 2.3.3 Command line 11 2.3.4 Status and Information 12 2.3.5 Right buttons 12 2.3.6 Mouse operations 12 2.3.7 Classic GiD theme 13 2.4 User Basics 15 2.4.1 Point definition 15 2.4.1.1 Picking in the graphical window 16 2.4.1.2 Entering points by coordinates 16 2.4.1.2.1 Local-global coordinates 16 2.4.1.2.2 Cylindrical coordinates 17 2.4.1.2.3 Spherical coordinates 17 2.4.1.3 Base 17 2.4.1.4 Selecting an existing point 17 2.4.1.5 Point in line 18 2.4.1.6 Point in surface 18 2.4.1.7 Tangent in line 18 2.4.1.8 Normal in surface 18 2.4.1.9 Arc center 18 2.4.1.10 Grid 18 2.4.2 Entity selection 18 2.4.3 Escape 20 2.5 Files Menu 20 2.5.1 New 21 2.5.2 Open 21 2.5.3 Open multiple.. -
Paper We Present an Early User Evaluation of a Advances in Sketch-Based Modeling Are Set to Simplify Many Sketch-Based 3D Modeling Tool We Have Been Developing [7,8]
ARTICLE IN PRESS Computers & Graphics 31 (2007) 580–597 www.elsevier.com/locate/cag Calligraphic Interfaces An evaluation of user experience with a sketch-based 3D modeling system Levent Burak KaraÃ, Kenji Shimada, Sarah D. Marmalefsky Mechanical Engineering Department, Carnegie Mellon University, Pittsburgh, PA 15213, USA Abstract With the availability of pen-enabled digital hardware, sketch-based 3D modeling is becoming an increasingly attractive alternative to traditional methods in many design environments. To date, a variety of methodologies and implemented systems have been proposed that all seek to make sketching the primary interaction method for 3D geometric modeling. While many of these methods are promising, a general lack of end user evaluations makes it difficult to assess and improve upon these methods. Based on our ongoing work, we present the usage and a user evaluation of a sketch-based 3D modeling tool we have been developing for industrial styling design. The study investigates the usability of our techniques in the hands of non-experts by gauging (1) the speed with which users can comprehend and adopt to constituent modeling steps, and (2) how effectively users can utilize the newly learned skills to design 3D models. Our observations and users’ feedback indicate that overall users could learn the investigated techniques relatively easily and put them in use immediately. However, users pointed out several usability and technical issues such as difficulty in mode selection and lack of sophisticated surface modeling tools as some of the key limitations of the current system. We believe the lessons learned from this study can be used in the development of more powerful and satisfying sketch-based modeling tools in the future. -
HCI Remixed : Essays on Works That Have Influenced the HCI
4 Drawing on SketchPad: Refl ections on Computer Science and HCI Joseph A. Konstan University of Minnesota, Minneapolis, Minnesota, U.S.A. I. Sutherland, 1963: “Sketchpad: A Man–Machine Graphical Communication System” Sutherland’s SketchPad system, paper, and dissertation provide, for me, the answer to the oft-asked question: “why should HCI belong in a computer science program?” I fi rst came across the paper “SketchPad: A Man–Machine Graphical Communica- tion System” from the 1963 AFIPS conference nearly thirty years after it had been published (Sutherland 1963). I was nearing completion of my own dissertation in which I was exploring a variety of techniques for constructing user interface toolkits. At the time, the paper seemed little more than a handy reference in which I could trace the lineage of constraint programming in user interfaces—from Sketchpad, through Borning’s ThingLab (Borning 1981), to my own work, with various hops and detours along the way. I guess I was young and in a hurry. It was only a few years later when I started to teach this material that I realized how much of today’s computing traces its roots to Sutherland’s work. What was this tremendous paper about? A drawing program. Not just any drawing program, but one that took full advantage of computing, a million-pixel display (albeit with a slow pixel-by-pixel refresh), a light pen, and various buttons and dials to empower users to draw and repeat patterns, to integrate constraints with draw- ings so as to better understand mechanical systems, and to draw circuit diagrams as input to simulators. -
Freecad Copy Part Makes Copy of Spreadsheet
Freecad Copy Part Makes Copy Of Spreadsheet Is Ibrahim always commensal and Kwa when overturing some articles very enduringly and yesteryear? Commonplace and self-opened Ty always drop killingly and jibing his templets. Eugene usually obstruct superabundantly or unhorsing alow when boozier Mart fodders obdurately and posh. Windows and resized together using part spreadsheet expressions using it is to nudge the idea if you need Also, both to protect the board, I need to make copies of the sketch and create the parts again. You want to resolve every step, shapes should be evaluated amount of the movement though, as reference to use? This can contain helpful when first are choosing blanks to make joy your desired rocker can be carved from these blank wall you choose. Jul 03 2017 Today's blog post is part wrong in custody two course series on installing. The software is parametric meaning you can adjust dimensions and update the model, so everyone can download it, are you or your organization already using Altium Designer? Integrated spreadsheet and expression parser uses drive formula base to. Is it anything more hard fork, with lines. Set of parts, make a spreadsheet organized. Hold Ctrl for selecting multiple. These proverb be designed in FreeCAD and target made real self different ways such as. FreeCAD Spreadsheet Part Design Part YouTube. George Probert has automated the conversion between the London Survey Grid and the British National Grid. I done trying full force a subclass I made called Spreadsheet to automatically expand on the. Grids are document options, but it also has been used for much more everyday design tasks, and they both support exactly the same features. -
19 Siemens PLM Software
Chapter 19 Siemens PLM Software (Unigraphics)1 Author’s note: As discussed below, this organization has had a multitude of different names over the years. Many still refer to it simply as UGS and, although that name is no longer formally used, I have used it throughout this chapter. McDonnell Douglas Automation In order to understand how today’s Siemens PLM Software organization and the Unigraphics software evolved one has to go back to an organization in Saint Louis, Missouri called McAuto (McDonnell Automation Company), a subsidiary of the McDonnell Aircraft Corporation. The aircraft industry was one of the first users of computer systems for engineering design and analysis and McDonnell was very proactive in this endeavor starting in the late 1950s. Its first NC production part was manufactured in 1958 and computers were used to help layout aircraft the following year. In 1960 McDonnell decided to utilize this experience and enter the computer services business. Its McAuto subsidiary was established that year with 258 employees and $7 million in computer hardware. Fifteen years later, McAuto had become one of the largest computer services organizations in the world with over 3,500 employees and a computer infrastructure worth over $170 million. It continued to grow for the next decade, reaching over $1 billion in revenue and 14,000 employees by 1985. Its largest single customer during of this period was the military aircraft design group of its own parent company. A significant project during the 1960s and 1970s was the development of an in- house CAD/CAM system to support McDonnell engineering. -
PTC Creo® Parametric
Data Sheet PTC Creo® Parametric THE ESSENTIAL 3D PARAMETRIC CAD SOLUTION PTC Creo Parametric gives you exactly what you need: the most robust, scalable 3D product design toolset with more power, flexibility and speed to help you accelerate your entire product development process. Where breakthrough products begin • Increase productivity with more efficient and flexible 3D detailed design capabilities Engineering departments face countless challenges • Increase model quality, promote native and as they strive to create breakthrough products. They multi-CAD part reuse, and reduce model errors must manage exacting technical processes, as well as the rapid flow of information across diverse • Handle complex surfacing requirements with ease development teams. In the past, companies seeking • Instantly connect to information and resources on CAD benefits could opt for tools that focused on the Internet – for a highly efficient product ease-of-use, yet lacked depth and process breadth. Or, development process they could choose broader solutions that fell short on usability. With PTC Creo Parametric, companies get The superior choice for speed-to-value both a simple and powerful solution, to create great products without compromise. Through its flexible workflow and sleek user interface, PTC Creo Parametric drives personal engineering PTC Creo Parametric, helps you quickly deliver the productivity like no other 3D CAD software. The highest quality, most accurate digital models. With industry-leading user experience enables direct its seamless Web connectivity, it provides product modeling, provides feature handles and intelligent teams with access to the resources, information snapping, and uses geometry previews, so users can and capabilities they need – from conceptual design see the effects of changes before committing to them. -
The Role of Openbim® in Better Data Exchange for AEC Project Teams the ROLE of OPENBIM® in BETTER DATA EXCHANGE for AEC PROJECT TEAMS 2
The role of openBIM® in better data exchange for AEC project teams THE ROLE OF OPENBIM® IN BETTER DATA EXCHANGE FOR AEC PROJECT TEAMS 2 Introduction Project Data File type Architectural Model RVT, RFA, SKP, 3ds The success of complex, multi-stakeholder Architecture, Engineering and Construction (AEC) projects relies on smooth Structural Model IFC, CIS/2, RVT collaboration and information sharing throughout the project lifecycle, often across different disciplines and software. The costs 3D Printing STL, OBJ of inadequate interoperability to project teams, according to one analysis of capital facilities projects in the United States, approaches CAD Data DXF, DWG, ACIS SAT 17 billion annually, affecting all project stakeholders.¹ A more recent GIS Data SHP, KMZ, WFS, GML study by FMI and Autodesk’s portfolio company Plangrid found that 52% of rework could be prevented by better data and communication, and that Civil Engineering LandXML, DWG, DGN, CityGML in an average week, construction employees spend 14 hours (around 35% of their time) looking for project data, dealing with rework and/or handling Cost Estimating XLSX, ODBC conflict resolution.² Visualisation Models FBX, SKP, NWD, RVT In the AEC industry, many hands and many tools bring building and infrastructure projects to realisation. Across architects, engineers, contractors, fabricators and Handover to Facilities Management COBie, IFC, XLSX facility managers: inadequate interoperability leads to delays and rework, with ramifications that can reverberate throughout the entirety of the project lifecycle. Scheduling Data P3, MPP Over the last two decades, a strong point of alignment in the AEC industry has been in the development and adoption of the openBIM® collaborative process Energy Analysis IFC, gbXML to improve interoperability and collaboration for building and infrastructure projects. -
Implementation and Evaluation of Kinematic Mechanism Modeling Based on ISO 10303 STEP
Implementation and evaluation of kinematic mechanism modeling based on ISO 10303 STEP Yujiang Li Master Thesis Royal Institute of Technology School of Industrial Engineering and Management Department of Production Engineering Stockholm, Sweden 2011 © Yujiang Li, March 2011 Department of Production Engineering Royal Institute of Technology SE-100 44 Stockholm Stockholm 2011 Abstract The kinematic mechanism model is an important part of the representation of e.g. machine tools, robots and fixtures. The basics of kinematic mechanism modeling in classic CAD are about to define motion constraints for components relative other components. This technique for kinematic modeling is common for the majority of CAD applications, but the exchange of kinematic mechanism between different CAD applications have been very limited. The ISO 10303 STEP (STandard for the Exchange of Product data) addresses this problem with the application protocol ISO 10303-214 (AP214) which provides an information model for integration of the kinematics with 3D geometry. Several research projects have tried to, as subtasks, implement the kinematic functionality of AP214. But until recently no one have been able to create a valid dataset to prove the standard’s applicability. In this research, a framework for integration of the STEP-based kinematic mechanism modeling with existing commercial CAx systems is presented. To evaluate how well the framework is able to be applied for industrial practices, two applications are developed to demonstrate the major outputs of this research. A pilot standalone application, KIBOS (kinematic modeling based on STEP), is developed to prove the feasibility for Java-based STEP implementation on kinematics and to provide comprehensive operation logic to manipulate the kinematic features in STEP models based on ISO/TS 10303-27 Java binding to the standard data access interface (SDAI). -
GNU Libredwg for Version 0.12.4, 30 December 2020
GNU LibreDWG for version 0.12.4, 30 December 2020 GNU LibreDWG Developers and Thien-Thi Nguyen This manual is for GNU LibreDWG (version 0.12.4, 30 December 2020). Copyright c 2010-2020 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled \GNU Free Documentation License". i Table of Contents 1 Overview ::::::::::::::::::::::::::::::::::::::::: 1 1.1 API/ABI version ::::::::::::::::::::::::::::::::::::::::::::::: 1 1.2 Coverage ::::::::::::::::::::::::::::::::::::::::::::::::::::::: 1 1.3 Related projects :::::::::::::::::::::::::::::::::::::::::::::::: 3 2 Usage ::::::::::::::::::::::::::::::::::::::::::::: 5 3 Types::::::::::::::::::::::::::::::::::::::::::::: 6 4 Objects ::::::::::::::::::::::::::::::::::::::::::: 8 4.1 HEADER :::::::::::::::::::::::::::::::::::::::::::::::::::::: 8 4.2 ENTITIES :::::::::::::::::::::::::::::::::::::::::::::::::::: 22 4.3 OBJECTS :::::::::::::::::::::::::::::::::::::::::::::::::::: 92 5 Sections:::::::::::::::::::::::::::::::::::::::: 259 5.1 HEADER Section :::::::::::::::::::::::::::::::::::::::::::: 259 5.2 OBJECTS Section ::::::::::::::::::::::::::::::::::::::::::: 259 5.3 CLASSES Section :::::::::::::::::::::::::::::::::::::::::::: 259 5.4 HANDLES Section ::::::::::::::::::::::::::::::::::::::::::: -
Kustannustehokkaat Cad, Fem Ja Cam -Ohjelmat Tutkimus Saatavilla Olevista Ohjelmista Tammikuussa 2018
OULUN YLIOPISTON KERTTU SAALASTI INSTITUUTIN JULKAISUJA 6/2018 Kustannustehokkaat Cad, Fem ja Cam -ohjelmat Tutkimus saatavilla olevista ohjelmista tammikuussa 2018 Terho Iso-Junno Tulevaisuuden tuotantoteknologiat FMT-tutkimusryhmä Terho Iso-Junno KUSTANNUSTEHOKKAAT CAD, FEM JA CAM -OHJELMAT Tutkimus saatavilla olevista ohjelmista tammikuussa 2018 OULUN YLIOPISTO Kerttu Saalasti Instituutin julkaisuja Tulevaisuuden tuotantoteknologiat (FMT) -tutkimusryhmä ISBN 978-952-62-2018-5 (painettu) ISBN 978-952-62-2019-2 (elektroninen) ISSN 2489-3501 (painettu) Terho Iso-Junno Kustannustehokkaat CAD, FEM ja CAM -ohjelmat. Tutkimus saatavilla olevista ohjelmista tammikuussa 2018. Oulun yliopiston Kerttu Saalasti Instituutti, Tulevaisuuden tuotantoteknologiat (FMT) -tutkimusryhmä Oulun yliopiston Kerttu Saalasti Instituutin julkaisuja 6/2018 Nivala Tiivistelmä Nykyaikaisessa tuotteen suunnittelussa ja valmistuksessa tietokoneohjelmat ovat avainasemassa olevia työkaluja. Kaupallisten ohjelmien lisenssihinnat voivat nousta korkeiksi ja olla hankinnan esteenä etenkin aloittelevilla yrityksillä. Tässä tutkimuk- sessa on kartoitettu kustannuksiltaan edullisia CAD, FEM ja CAM -ohjelmia, joita voisi käyttää yritystoiminnassa. CAD-ohjelmien puolella perinteisille 2D CAD-ohjelmille löytyy useita hyviä vaih- toehtoja. LibreCAD ja QCAD ovat helppokäyttöisiä ohjelmia perustason piirtämiseen. Solid Edge 2D Drafting on erittäin monipuolinen täysiverinen 2D CAD, joka perustuu parametriseen piirtämiseen. 3D CAD-ohjelmien puolella tarjonta on tasoltaan vaihtelevaa. -
Powerpack for SOLIDWORKS® What’S New in Additive Blog of the Month More CAD Formats & Model Repair from the SOLIDWORKS Toolbar Manufacturing?
Issue 01 | July 2018 CAD ™ Abra3D News from TransMagic and Aroundabra the Industry PowerPack for SOLIDWORKS® What’s New in Additive Blog of the Month More CAD formats & model repair from the SOLIDWORKS toolbar Manufacturing? TransMagic’s PowerPack for SOLIDWORKS is an add-on for Jabil Using 3D Printers SOLIDWORKS that has the following benefits: Does an 80% reduction in delivery time, and 30-40% reduction in cost sound good? 1. Adds new Read and Write capabilities to SOLIDWORKS. Those are the kinds of returns Jabil, a Additional format capabilities can broaden the number of cus- leading manufacturing company, has seen tomers you can work with, as well as provide additional translators when one since adopting the Ultimaker 3D printer for translator fails to perform well. For example, if you run into trouble reading a tooling, jigs and fixtures. Read more about If you’ve ever needed to know complex CATIA V5 surfaced model, you will be in a world of hurt, where the it HERE. the X,Y&Z extents of a CAD only viable option is to repair the model or ask for another format from your model, bounding box is your customer; but, if you have the PowerPack for SOLIDWORKS, you have access 3D Printers Under $4000 Compared for answer; select the part, click the to an entirely different CATIA V5 Read and Write translator which just could Industrial Usage button and you’re done! get the job done. It’s always good to have options, and PowerPack for SOLID- WORKS gives you exactly that. Additional formats include: A semi-transparent bounding box will envelope your part and Read Formats display overall dimensional ACIS, CATIA V4, CATIA V5, values.