scholarly journals Hardware and Software Implementation of Constructive Geometric Models

2020 ◽  
pp. 83-98
Author(s):  
Denis Voloshinov ◽  
Konstantin Solomonov
Keyword(s):  
Computer Technology ◽  
Geometric Modeling ◽  
Software Implementation ◽  
Theoretical Research ◽  
Graphical Interface ◽  
Calculation Methods ◽  
Geometric Transformations ◽  
Geometric Models ◽  
Long Time ◽  
Geometric Modeling System

The article is devoted to the consideration of a number of issues of hardware and software implementation of constructive geometric models. A rich arsenal of theoretical research in the field of constructive geometry has not been properly used for a long time due to the lack of tools for translating such models using computer technology. The development and improvement of the Simplex geometric modeling system, in which any geometric design is considered as a converter of information represented by signals of a geometric nature, has opened the possibility of applying the achievements of geometric science in computing applications, as well as the development of hardware that implements geometric calculation methods and provides a new graphical interface. The concept developed by the authors is aimed at creating specialized accelerators of geometric transformations.

scholarly journals Algorithm and software for shortening heat run test of oil-immersed power transformers

Tehnika ◽  
2020 ◽  
Vol 75 (4) ◽  
pp. 333-340
Author(s):  
Marko Novković ◽  
Zoran Radaković
Keyword(s):  
Thermal Capacity ◽  
Production Costs ◽  
Software Implementation ◽  
Power Transformers ◽  
Accelerated Ageing ◽  
Calculation Methods ◽  
Total Cost ◽  
Safety Margins ◽  
Long Time ◽  
Run Test

One of the type tests on power transformers is heat run test, which checks that the characteristic winding and oil temperatures are below allowed values. This is necessary to prevent accelerated ageing and shortening of the transformer life if the temperatures are higher than the allowed values. In addition to the user's clear interest, manufacturers are also interested in the results of heat run tests, as they can verify and improve the accuracy of calculation methods and software [1]. Then they can increase the accuracy and reduce the safety margins of calculation methods, so they can change transformer construction and achieve temperatures that are much closer to the allowed ones. As the result of that, they can reduce material and production costs. The minimal test is defined by the IEC standard [2]. Due to the great mass and consequent great thermal capacity of the transformer parts, heat run tests take a very long time. The paper presents an algorithm, and its software implementation, which reduce the occupancy of test station, energy consumption and the total cost of performing heat run tests.

A Review Paper on Human Computer Interaction

2018 ◽  
Vol 8 (4) ◽  
pp. 53 ◽  
Author(s):  
Himanshu Bansal ◽  
Rizwan Khan
Keyword(s):  
Human Computer Interaction ◽  
Computer Technology ◽  
Mental Model ◽  
Review Paper ◽  
Current Approach ◽  
Automated System ◽  
Age Group ◽  
Long Time ◽  
Interaction Research ◽  
Computer Interaction

The advancement in the development of computer technology has led to the idea of human computer interaction. Research experiments in human computer interaction involves the young age group of people that are educated and technically knowledgeable. This paper focuses on the mental model in Human Computer Interaction. There are various approaches of this review paper and one of them is highlighting current approach, results and the trends in the human computer interaction and the second approach is to find out the research that have been invented a long time before and are currently lagging behind. This paper also focuses on the emotional intelligence of a user to become more user like, fidelity prototyping. The development and design of an automated system that perform such task is still being accomplished.

Design for Assembly Evaluation of Orientation Difficulty Features

1992 ◽  
Author(s):  
Robert H. Sturges ◽  
Jui-Te Yang
Keyword(s):  
Geometric Modeling ◽  
Boundary Representation ◽  
Design For Assembly ◽  
Assembly Process ◽  
Assembly Evaluation ◽  
Index Of Difficulty ◽  
Analysis System ◽  
Time Required ◽  
High Level ◽  
Geometric Modeling System

Abstract In support of the effort to bring downstream issues to the attention of the designer as parts take shape, an analysis system is being built to extract certain features relevant to the assembly process, such as the dimension, shape, and symmetry of an object. These features can be applied to a model during the downstream process to evaluate handling and assemblability. In this paper, we will focus on the acquisition phase of the assembly process and employ a Design for Assembly (DFA) evaluation to quantify factors in this process. The capabilities of a non-homogeneous, non-manifold boundary representation geometric modeling system are used with an Index of Difficulty (ID) that represents the dexterity and time required to assemble a product. A series of algorithms based on the high-level abstractions of loop and link are developed to extract features that are difficult to orient, which is one of the DFA criteria. Examples for testing the robustness of the algorithms are given. Problems related to nearly symmetric outlines are also discussed.

Design of Control of DC Motor

2014 ◽  
Vol 611 ◽  
pp. 325-331
Author(s):  
Ľubica Miková ◽  
Michal Kelemen ◽  
Vladislav Maxim ◽  
Jaromír Jezný
Keyword(s):  
Mathematical Model ◽  
Virtual Environment ◽  
Computer Technology ◽  
Current Practice ◽  
Scientific Literature ◽  
Model Simulation ◽  
Graphical Interface ◽  
Dc Motors ◽  
Matlab Program ◽  
Simulation Results

In current practice the use of mathematical models is substantially widespread, reason being the recent increase in development of programs for this purpose, with the option of model simulation in a virtual environment, proportional to the evolving computer technology. The article contains a mathematical model created using Matlab program. The simulation results are compared with scientific literature that addresses DC motors and evaluated. For simplicity, a graphical interface was created.

Towards Dynamic Tolerance Analysis Using Bond Graphs

1998 ◽  
Author(s):  
Otto W. Salomons ◽  
Johan Zijlstra ◽  
Johnny A. van der Zwaag ◽  
Fred J. A. M. van Houten
Keyword(s):  
Dynamic Behavior ◽  
Robust Design ◽  
Physical Modeling ◽  
Geometric Modeling ◽  
Tolerance Analysis ◽  
Simulation System ◽  
Computer Support ◽  
Bond Graphs ◽  
Physical Effects ◽  
Geometric Modeling System

Abstract A generic method is proposed by which the effect of tolerances in combination with physical effects such as wear can be analysed on the dynamic behavior of mechanisms. The method uses bond graphs in order to simulate the dynamic behavior under the influence of tolerances and other physical effects. The method has the potential to offer enhanced computer support in tolerance value specification as well as in robust design and model based maintenance. The method has partly been implemented using a combination of a geometric modeling system (FROOM) and a bond graph based physical modeling and simulation system (20-Sim).

scholarly journals Geometric modeling of surfaces dependent cross sections in the tasks of spinning and laying

2019 ◽  
Vol 110 ◽  
pp. 01057
Author(s):  
Yuri Deniskin ◽  
Pavel Miroshnichenko ◽  
Andrew Smolyaninov
Keyword(s):  
Composite Materials ◽  
Cross Sections ◽  
Geometric Modeling ◽  
Geometric Model ◽  
Solid Modeling ◽  
Uniform Method ◽  
Calculation Methods ◽  
Related Process

The article is devoted to the development of a geometric model of surfaces of dependent sections to solve the problems of winding by continuous fibers in the direction of the force and its related process of automated winding of composite materials. A uniform method for specifying the surfaces of dependent sections with a curvilinear generator and a method for solid modeling of the shell obtained by winding or calculation methods are described.

scholarly journals Interactive Geometric Modeling System based on Practical Engineering Drawings

1984 ◽  
Vol 27 (230) ◽  
pp. 1788-1795
Author(s):  
Tamio AIZAWA ◽  
Kohichi YAMATO ◽  
Masaru NAKAZAWA
Keyword(s):  
Geometric Modeling ◽  
Practical Engineering ◽  
Engineering Drawings ◽  
Geometric Modeling System

Investigations on the Fluid-Structure Interactions of Fishing Nets

2006 ◽  
Author(s):  
Hans-Joachim Winkel ◽  
Mathias Paschen
Keyword(s):  
Theoretical Models ◽  
Transverse Force ◽  
Circular Cylinders ◽  
Fluid Structure Interactions ◽  
Calculation Methods ◽  
Fluid Structure ◽  
Long Time ◽  
Helical Strakes

Modern nets consist of meshes made of threads or twines with spirals or helical strakes. Fluid-structure interactions have been investigated in Rostock for a long time applying different theoretical models. Because of great net flexibility there is a need of calculation methods which consider the main physical qualities. This is done by the approximation of wake of threads by results from circular cylinders and influence of circulation, which is known from measurements of transverse force. Results of measurements with two models with and without spirals are given for comparison.

Construction of Receptor Geometric Models for Objects of Complex Technical Forms

2020 ◽  
Vol 7 (4) ◽  
pp. 44-56 ◽  
Author(s):  
Vin Tun E ◽  
Leonid Markin
Keyword(s):  
Solid State ◽  
Geometric Modeling ◽  
Parametric Models ◽  
State Model ◽  
Universal Method ◽  
Receptor Model ◽  
Geometric Models ◽  
Cad System ◽  
Receptor Models ◽  
Single Receptor

In this paper the question related to the use of receptor (voxel) method for geometric modeling to solve practical design problems has been considered. The use of receptor methods is effective in solving a certain class of problems, primarily the problems of automated layout. The complexity of this method’s practical use is due to the fact, that receptor geometric models are never the primary ones. They are formed based on parametric models specified by designer. Receptor models are the internal machine ones. The main problem that prevents the widespread use of the receptor method is the lack of universal methods for converting parametric models into the receptor ones. Available publications show that in solving practical problems various authors have developed their own methods for creating receptor models for objects of "primitives" and "composition of primitives" classes. Therefore, it is extremely urgent to solve the problem of developing a universal method of forming receptor models for objects of complex technical forms. The essence of the proposed method is the transformation of a solid-state model created in a CAD system into a receptor matrix. First in the physical one, in which the solid-state model is discretized into cubes with receptor sizes, and then in the mathematical one — a three-dimensional array with binary codes of zeros and ones. The creation of a physical receptor matrix is carried out by means of the CAD-system itself, allowing diagnose the belonging of a single receptor to a simulated object. The fact of intersection or non-intersection a given position by a single receptor is encoded by "1" and "0" respectively, and this information is transferred to a mathematical receptor model (3-dimensional binary array). This calculation procedure is programmed in the form of a macro, providing a given position of a single receptor and fixing the fact of its intersection with the solid-state model. Have been demonstrated examples for described method’s practical application, and has been carried out CPU time cost estimation for the construction of a physical receptor model depending on the receptor size and object geometric complexity. Actions on data transformation from a solid-state model to a receptor one have been implemented in the form of C# programs.

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