New Methods of the Computer Aided Design of Roof Skeletons

2016 ◽  
Vol 4 (2) ◽  
pp. 3-7 ◽  
Author(s):  
Козневски ◽  
E. Kozniewski
Keyword(s):  
Information Technology ◽  
Computer Aided Design ◽  
Geometric Design ◽  
Efficient Design ◽  
Orthographic Projection ◽  
Logic Operation ◽  
New Methods ◽  
Computer Aided ◽  
The Times ◽  
Aided Design

The problem of efficient design of roofs is a topical area of research. This is confirmed by scientific studies [1–5, etс.]. Today, in the times of information technology in all areas of actively using the computer and specific programs [6; 12; 15, etc.]. The author presents a proposal of geometric design (geometric solutions) for roofs with restrictions, so-called "roof with its neighbors."Roofs are treated as a special class of polyhedral surfaces. Construction includes a corresponding attachment roof with restrictions on the roof on a simple connection of the polygon, designing a conventional roof and perform the appropriate logic operation. Fig. 1. The Boolean operations are useful tools in geometrical designing of roof skeletons. Solving roofs with neighbors is much easier if we bring them to solve simple roofs over simpleconnected polygon base. The difficulty comes to the design of an appropriate polygonal base. This method essentially involves applying geometric design of a regular roof to design a roof with constraints, which can be relatively easily performed with a CAD program [13]. The elements of a roof: a) a roof with its elements in the orthographic projection, b) the roof with its elements in a military axonometry, c) the line of disappearing ridges of the roof in the orthographic projection [9].

Innovative Approaches for Teaching Descriptive Geometry With CADD

1991 ◽  
Author(s):  
John G. Cherng
Keyword(s):  
Computer Aided Design ◽  
Descriptive Geometry ◽  
New Methods ◽  
Computer Aided ◽  
Cylindrical Solid ◽  
Aided Design ◽  
Innovative Approaches

Abstract This paper presents the innovative approaches that can be implemented in teaching descriptive geometry by using a Computer-Aided-Design-Drafting (CADD) software. Examples of line relations, line/surface relations, and plane/cylindrical solid intersections are given in the paper. The paper first discusses the principles of descriptive geometry, and then focuses on how these principles can be applied in a CADD environment. In addition, new methods that take advantage of CADD are also provided. The paper emphasizes creativity while solving descriptive problems by using a CADD software. Although all examples illustrated in CADKEY, the concepts revealed in this paper can be applied to other 3-D CADD software, such as AutoCAD 10 and will significantly improve the engineering student’s CADD skills.

Computer Aided Geometric Design of Two-Parameter Freeform Motions

1999 ◽  
Vol 121 (4) ◽  
pp. 502-506 ◽  
Author(s):  
Q. J. Ge ◽  
M. Sirchia
Keyword(s):  
Computer Aided Design ◽  
Control Structure ◽  
Geometric Design ◽  
Computer Aided Geometric Design ◽  
Kinematic Control ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Two Parameter ◽  
And Robotics

This paper brings together the notion of analytically defined two-parameter motion in Theoretical Kinematics and the notion of freeform surfaces in Computer Aided Geometric Design (CAGD) to develop methods for computer aided design of two-parameter freeform motions. In particular, a rational Be´zier representation for two-parameter freeform motions is developed. It has been shown that the trajectory surface of such a motion is a tensor-product rational Be´zier surface and that such a kinematically generated surface has a geometric as well as a kinematic control structure. The results have not only theoretical interest in CAGD and kinematics but also applications in CAD/CAM and Robotics.

scholarly journals Computer-Aided Sketching: Incorporating the Locus to Improve the Three-Dimensional Geometric Design

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1181 ◽  
Author(s):  
José Ignacio Rojas-Sola ◽  
David Hernández-Díaz ◽  
Ricardo Villar-Ribera ◽  
Vicente Hernández-Abad ◽  
Francisco Hernández-Abad
Keyword(s):  
Computational Geometry ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Geometric Design ◽  
Curved Surfaces ◽  
Two Dimensional ◽  
Technical Design ◽  
Computer Aided ◽  
Aided Design

This article presents evidence of the convenience of implementing the geometric places of the plane into commercial computer-aided design (CAD) software as auxiliary tools in the computer-aided sketching process. Additionally, the research considers the possibility of adding several intuitive spatial geometric places to improve the efficiency of the three-dimensional geometric design. For demonstrative purposes, four examples are presented. A two-dimensional figure positioned on the flat face of an object shows the significant improvement over tools currently available in commercial CAD software, both vector and parametric: it is more intuitive and does not require the designer to execute as many operations. Two more complex three-dimensional examples are presented to show how the use of spatial geometric places, implemented as CAD software functions, would be an effective and highly intuitive tool. Using these functions produces auxiliary curved surfaces with points whose notable features are a significant innovation. A final example provided solves a geometric place problem using own software designed for this purpose. The proposal to incorporate geometric places into CAD software would lead to a significant improvement in the field of computational geometry. Consequently, the incorporation of geometric places into CAD software could increase technical-design productivity by eliminating some intermediate operations, such as symmetry, among others, and improving the geometry training of less skilled users.

Computer Aided Geometric Design of Line Constructs

1991 ◽  
Vol 113 (4) ◽  
pp. 363-371 ◽  
Author(s):  
B. Ravani ◽  
J. W. Wang
Keyword(s):  
Computer Aided Design ◽  
Geometric Design ◽  
Numerical Control ◽  
Ruled Surfaces ◽  
Motion Generation ◽  
Computer Aided ◽  
Nc Milling ◽  
On Line ◽  
Tool Motion ◽  
Aided Design

This paper develops a mathematical foundation for Computer Aided Design (CAD) of sculptured shapes based on line geometry. First, a new representation is presented for a line based on Plu¨cker coordinates that would allow specification of a line segment (rather than an infinite line) in an elegant manner and suitable for computational purposes. Then, methods are presented for geometric design of shape patches (here referred to as line constructs) by interpolating or approximating a set of control lines (rather than control points) using ruled surfaces, line congruences, and line complexes. The methods presented are general and allow utilization of different basis functions such as Be´zier, Cardinal, and B-spline bases. As Computer Aided Manufacturing (CAM) application of the theory, methods are developed for generation of offsets of ruled surfaces useful in Numerical Control (NC) milling and tool motion generation in the Wire Cut Electric Discharge Machining (EDM) operation.

Computer Aided Geometric Design of Line Constructs

1990 ◽  
Author(s):  
B. Ravani ◽  
J. W. Wang
Keyword(s):  
Computer Aided Design ◽  
Geometric Design ◽  
Numerical Control ◽  
Ruled Surfaces ◽  
Motion Generation ◽  
Computer Aided ◽  
Nc Milling ◽  
On Line ◽  
Tool Motion ◽  
Aided Design

Abstract This paper develops a mathematical foundation for Computer Aided Design (CAD) of sculptured shapes based on line geometry. First, a new representation is presented for a line based on Plücker coordinates that would allow specification of a line segment (rather than an infinite line) in an elegant manner and suitable for computational purposes. Then, methods are presented for geometric design of shape patches (here referred to as line constructs) by interpolating or approximating a set of control lines (rather than control points) using ruled surfaces, line congruences and line complexes. The methods presented are general and allow utilization of different basis functions such as Bézier, Cardinal and B-spline bases. As Computer Aided Manufacturing (CAM) application of the theory, methods are developed for generation of offsets of ruled surfaces useful in Numerical Control (NC) milling and tool motion generation in the Wire Cut Electric Discharge Machining (EDM) operation.

Geometric Issues in Computer Aided Design/Computer Aided Engineering Integration

2011 ◽  
Vol 11 (2) ◽  
Author(s):  
Vadim Shapiro ◽  
Igor Tsukanov ◽  
Alex Grishin
Keyword(s):  
Computer Aided Design ◽  
Computer Aided Engineering ◽  
Geometric Design ◽  
Engineering Analysis ◽  
Engineering Applications ◽  
Fully Integrated ◽  
Computer Aided ◽  
Geometric Representations ◽  
Engineering Integration ◽  
Aided Design

The long-standing goal of computer aided design (CAD)/computer aided engineering (CAE) integration demands seamless interfaces between geometric design and engineering analysis/simulation tasks. The key challenge to this integration stems from the distinct and often incompatible roles geometric representations play, respectively, in design and analysis. This paper critically examines and compares known mesh-based and meshfree approaches to CAD/CAE integration, focusing on the basic tasks and components required for building fully integrated engineering applications. For each task, we identify the fundamental requirements and challenges and discuss how they may be met by known techniques and proposed solutions.

scholarly journals Practice and Exploration on Teaching Reform of Garden Computer-Aided Design

2019 ◽  
Vol 3 (3) ◽  
pp. 235
Author(s):  
Minjuan Yao ◽  
Zhixin Qi
Keyword(s):  
Curriculum Reform ◽  
Computer Aided Design ◽  
Garden Design ◽  
Teaching Reform ◽  
Computer Aided ◽  
Teachers And Students ◽  
Social Modernization ◽  
Design Software ◽  
The Times ◽  
Aided Design

<p>With the continuous development of social modernization, relevant courses of garden design major should also comply with the development of the times AND ATTEMPT TO improve the ability of students to use relevant modern garden design software. This paper mainly explores the teaching reform of garden computer-aided design course.This paper is divided into three parts: the first part investigates the establishment and assessment of computer-aided design related courses in landscape architecture as well as the views of teachers and students on related courses. The second part, developing the landscape computer-aided design related curriculum reform program according to the investigation of the current situation; the third part expounds the significance of the curriculum reform of garden computer-aided design.</p>

Two Generalizations of the Isometric Projection in Geometric Design

1987 ◽  
Author(s):  
D. J. Wilde
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Geometric Design ◽  
Structural Members ◽  
Rotation Matrices ◽  
Computer Aided ◽  
Drawing Board ◽  
Aided Design

Abstract The well-known pictorial drafting technique of isometric drawing is here generalized in two ways, called “isoclinal” and “axial”, or collectively, “symmetric”. Although the isoclinal projection preserves the useful property of foreshortening adjacent edges equally, and the axial projection foreshortens adjacent edges equally, the directions for these projections usually differ from that for isometric projection. Formulas are derived for the isoclinal and axial directions and their foreshortening factors and rotation matrices. Although intended for three-dimensional computer-aided design, the symmetric projections can also be performed on a drawing board with a protractor. Graphic examples involving design of non-rectangular connectors for three skew structural members and adjacent plates in space are presented.

scholarly journals ПРИМЕНЕНИЕ ИНФОРМАЦИОННЫХ ТЕХНОЛОГИЙ В ПРЕПОДАВАНИИ ДИСЦИПЛИНЫ «ЦВЕТОВЕДЕНИЕ И КОЛОРИСТИКА» (НА ПРИМЕРЕ ПРОФИЛЯ «ПРИКЛАДНАЯ ИНФОРМАТИКА В ДИЗАЙНЕ»)

2020 ◽  
Author(s):  
Anna Zolkina ◽  
Olga Naumenko
Keyword(s):  
Information Technology ◽  
Computer Aided Design ◽  
Course Design ◽  
Learning Resources ◽  
Bachelor Degree ◽  
Color Science ◽  
Computer Aided ◽  
Applied Informatics ◽  
History Of ◽  
Aided Design

Введение. Представлена актуальность применения информационных технологий при преподавании дисциплины «Цветоведение и колористика» по профилю обучения «Прикладная информатика в дизайне» направления подготовки «Прикладная информатика» бакалавриата. Дан анализ истории цветоведения и истории преподавания дисциплины «Цветоведение и колористика», а также обзор подходов практико-ориентированного обучения в учебной и проектной деятельности будущих информатиков в дизайне. Материал и методы. Были проведены традиционные лекционные, практические занятия и курсовое проектирование, а также занятия и курсовое проектирование с внедрением информационных технологий в процессе преподавания дисциплины «Цветоведение и колористика». Использовалась система LMS Canvas. Далее был проведен педагогический эксперимент в форме опроса с последующим анализом по результатам внедрения инновационных информационных методов в педагогический процесс. Результаты и обсуждение. Приведены примеры успешного применения информационных технологий и электронных образовательных ресурсов на кафедре АПД НИТУ МИСИС в преподавании дисциплины «Цветоведение и колористика» для студентов бакалавриата по профилю «Прикладная информатика в дизайне». С помощью средств электронного образовательного ресурса LMS Canvas создана цифровая среда «Цветоведение и колористика» по профилю «Прикладная информатика в дизайне» и организовано виртуальное взаимодействие преподавателя со студентами. В дополнении к классическим методам изучения дисциплины посредством LMS Canvas реализована возможность интерактивного обучения, позволяющая присылать работы для проверки в электронном виде. Появилась возможность активного обсуждения возникающих вопросов в режиме онлайн, дистанционной проверки присланных студентом предварительно сфотографированных или отсканированных работ и отправка работ, требующих дополнения или редакции на доработку. Система LMS Canvas позволяет структурировать и систематизировать теоретический материал в доступной для студента форме, контролировать сроки «открытия» и «закрытия» каждого следующего раздела дисциплины, устанавливать необходимые преподавателю «дедлайны», фиксировать даты контрольных работ и автоматически оповещать обучающихся об их приближении. Появилась возможность создания базы данных с электронными портфолио студентов для демонстрации работодателям. Обсуждение результатов внедрения инновационных информационных методов было реализовано с помощью электронного опроса с использованием Google Forms, который выявил рост интереса к дисциплине «Цветоведение и колористика» в процессе использования электронных обучающих ресурсов и повышение скорости освоения материала. Заключение. Применение информационных технологий в преподавании дисциплины «Цветоведение и колористика» на примере профиля «Прикладная информатика в дизайне» на кафедре АПД НИТУ «МИСиС» способствует повышению уровня приобретаемых обучающимися компетенций; зафиксирован рост интереса к дисциплине и увеличение понимания студентами направления подготовки 09.03.03 процесса дизайнерского проектирования. Введение информационных инновационных форм и методов обучения студентов позволяет усовершенствовать методические основы профессионального образования в области дизайна и способствует усилению творческой и профессионально-практической части обучения информатиков-дизайнеров.Introduction. In this paper, topicality of information technology application in teaching “Colour Science and Coloristics” course at “Applied Informatics in Design” profile of “Applied Informatics” bachelor degree field of education is validated. The analysis of the history of color science and the history of teaching the discipline “Color Science and Coloristics” is given. Approaches to practice-oriented teaching in educational and design activity of future information specialists in the field of design are described. Material and methods. Lectures, practical studies and course design for “Colour Science and Coloristics” course were delivered (1) using conventional teaching procedures and (2) with application of information technology. In both implementations, Canvas LMS was used. Then pedagogical experiment was carried out in the form of questionnaire with the following analysis of innovative informational methods in educational process. Results and discussion. In this paper, example of successful application of information technology and educational learning resources at Department of Computer Aided Design of National University of Science and Technology “MISIS” in teaching “Colour Science and Coloristics” course for bachelor degree students of “Applied Informatics in Design” profile are given. Digital environment of “Colour Science and Coloristics” of “Applied Informatics in Design” profile was created using digital learning resource LMS Canvas and virtual interaction between teacher and students was implemented. Option of on-line training to the course (in addition to conventional training methods) was implemented using Canvas LMS. This option allows submitting of assignments in digital form for checking. There are options of online discussion of actual topics, remote checking of received student’s depicted or scanned assignments and return of assignments, which require improvement or editing for correction. Canvas LMS allows to arrange and systemize theoretical material in the form comprehensible for student, control dates of opening and closing for every following course module, set deadlines required by teacher, fix dates of module tests and automatically announce the students about these dates. There is the option of creation of database with digital students’ portfolios for demonstration to potential employers. Discussion of results of innovative informational methods was performed by digital questionnaire with application of Google Forms. The discussion indicates growth of interest to “Colour Science and Coloristics” course in the process of electronic learning resources application and increase of material acquisition rate. Conclusion. Application of information technology in teaching “Colour Science and Coloristics” course of “Applied Informatics in Design” profile at Department of Computer Aided Design of NUST MISiS contributes to increase of level of skills acquired by students: growth of interest to the course is observed; students of 09.03.03 profile better understand engineering and design. Implementation of innovative informational teaching forms and methods allows enhancing methodology of professional education in the field of design and facilitates enhancement of creative and professional practical parts of education of computational specialists in design.

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