Development Of Computer-aided Design System Research Articles

Simulation of the power supply system of the coal mine section

At present, the designing of a power supply system for mine sections is performed in accordance with obsolete regulatory documents made in the early 90s of the 20th century. This slows down the implementation of the ‘digital mining operation’ concept and prevents the full potential for energy savings from being realized. At the same time, development of digital technologies makes the issues of computer simulation of the power supply system of the coal mine sections urgent. Simulating computer modelling is required to develop measures for increasing the efficiency of the power supply system of operating coal mines as well as for designing new coal mines. The article offers the methodology of forming simulation computer models for evaluation of the energy efficiency of the power supply system for a coal mine section. To ensure the correct development of active and reactive power consumption profiles, it is proposed to use scenario approach to modelling dynamic processes. As an example of using the proposed approach, one of the scenarios for the operation of power supply system of a mine section at one of the coal mines of Kuzbass is reviewed here. The proposed approach to scenario modelling of operating modes of a mine section ensures the correct modelling of dynamic processes for the subsequent assessment of the effectiveness of the use of intelligent devices for controlling the flows of active and reactive power, which will make it possible to accurately assess the effect of FACTS devices on the level of active power losses, as well as the quality indicators of the electrical energy. The proposed methodology can be used in the development of computer-aided design systems for the design of energy-efficient power supply systems for extraction areas.

Верификация моделирования проводных антенн методом моментов

. Modeling of several antennas by the method of moments in the TALGAT system was performed for comparison with tested results. At first, the published results for half-wave and wave dipoles are compared with our results. Current module distributions and frequency dependences of the real and imaginary parts of the input impedance are obtained. The results showed a good match. Then the published experimental and analytical results for the radiation pattern and frequency dependence of the admittance of the gull shape antenna are compared with our results. The convergence of the results with segment length decreasing is shown. A good match is obtained. It is shown that detailed testing is important in the process of implementation and development of computer-aided design systems

Diseño de JIGS para el Area de Pintura mediante Solidworks®

Drawing is a language or half of Communication that allows you to make known ideas or messages by using images, figures or symbols; for this reason, it is also called graphic representation. Today, computers have greatly simplified the way we design and manufacture parts or mechanical components. The term Computer Aided design (CAD) refers to a set of technologies based on the use of computers to create, analyse, and optimize the design in the field of engineering. CAD programs provide a graphical user interface (GUI) that allows the user to enter and manipulate geometric objects in 2 and 3 dimensions, create engineering drawings, do basic analysis as the calculation of Mass properties, as well as visualizing and manipulating individual components or assemblies that represent mechanisms or machinery that are increasingly complex. The development of CAD systems in the last 50 years has been parallel to computer technology (Jensen, 2004), and we find various applications in all fields of science, the automotive industry and aerospace its main Propellers. The present work It deals with the use of Solidworks ® for the elaboration of JIGS (frames) for different automotive plastic components that will have to move to the painting area and then to a baking process, without these deforming.

Development of computer-aided design system of sensitive elements of control and automation systems

The subject of research is the element base of devices of control and automation systems used in modern weight- and force-measuring devices, in particular, consisting of annular elastic sensitive elements. The developing of annular elastic sensitive elements is based on the analysis of existing methods for calculating elastic elements, new algorithms and modified methods for calculating. The proposed automated methods for analyzing the statics and dynamics of the element base under investigation are based both on analytical methods of the classical mechanics of elastically deformed bodies and on numerical methods for the purpose of exploiting their advantages and compensating for the weaknesses. For the development of automated design systems for annular elastic sensitive elements, mathematical modeling of deformation processes in a solid was carried out and an analysis of their characteristics was carried out using the modern ANSYS software complex on the basis of the finite element method. The mathematical model of the annular elastic sensitive element has a high degree of adequacy, low laboriousness with high productivity and low time costs. The software package is based on generating the most geometric model, as well as creating nodes and elements. When calculating the frequencies and forms of free oscillations, a modal analysis is used for linear systems. The solutions obtained were refined by means of harmonic analysis and analysis of transient processes. The article proposes a new approach to calculate and design the force-measuring membrane elastic element of the force sensor used in industrial scales with modern computer simulation methods. The reasons for the sensor error are described. The possibility of reducing the nonlinearity of the elastic characteristic and hysteresis due to the geometric nonlinearity and dry friction in the supports is considered. Rational geometric parameters of the elastic element were determined by the methods of finite element modeling, which make it possible to significantly reduce measurement errors. The research results are implemented in the practice of calculating and designing real structures. The results of the dynamic calculation were compared with the experimental data. For this purpose, were used the bar-and-pic chart of application of load of the elastic sensitive elements. The developed system of computer-aided design of sensitive elements of annular elastic elements will allow to ensure the production of modern and competitive domestic element base of automation devices.

Using open source software in development of computer-aided design systems for radar

The paper focuses on creation of a software component designed for the automated calculation of the stress-strain state of radar structure. The relevance of the work is shown, the statement of the problem, methods for its solution and the main development results are given

Development of computer-aided design system of elastic sensitive elements of automatic metering devices

The object of research is the element base of devices of control and automation systems, including in its composition annular elastic sensitive elements, methods of their modeling, calculation algorithms and software complexes for automation of their design processes. The article is devoted to the development of the computer-aided design system of elastic sensitive elements used in weight- and force-measuring automation devices. Based on the mathematical modeling of deformation processes in a solid, as well as the results of static and dynamic analysis, the calculation of elastic elements is given using the capabilities of modern software systems based on numerical simulation. In the course of the simulation, the model was a divided hexagonal grid of finite elements with a maximum size not exceeding 2.5 mm. The results of modal and dynamic analysis are presented in this article.

Cognitive Tools for Design Engineers: A Framework for the Development of Intelligent CAD Systems

Abstract Great design engineers are highly creative and unorthodox individuals who invent novel solutions that satisfy a set of constraints that are often ill-defined and customer driven. Designers use many tools to develop their designs, such as computer aided design (CAD) systems, that do not support the cognition that drives the design process. This paper develops the cognitive psychological background, a state of the practice based rationale for CAD enhancement and the research framework for cognitive CAD tools that support the design engineer during the creative problem solving process through reasoning and meaningful design alternatives. The research framework presented here was initially created for the development of cognitive tools for mechanical design but is transferable to other design disciplines. At the core of the research plan are the development and implementation of an artificial memory that is interpreted with real-time data analyses supported by machine learning, and made accessible to the design engineer through interaction design for intelligent CAD (iCAD).

Hierarchical Modeling for Synthetic Biology

One of the characteristics of synthetic biology is that it often combines mathematical modeling with experimental work. The link between modeling and experiments is carried out by human researchers who have a conceptual understanding of the underlying biological system. At present, there is no method for representing a conceptual description that can be used to connect mathematical models and experimental data, especially sequence annotations, pertaining to the same underlying biological system. One reason for this limitation is that there can exist different mathematical models of the same biological system. In such cases, the same annotation in a DNA sequence would map differently to different models of the same system. In order to enable software support for synthetic biology, a software framework is needed such that it is able to capture a conceptual description of a biological system, including quantitative values, without confining itself to one mathematical model. The novel use of hierarchical modeling inside TinkerCell (www.tinkercell.com) provides one potential software solution for representing a "conceptual diagram" of a biological system. The conceptual diagram does not assume any underlying model. Rather, the diagram is mapped automatically to one of several models. The diagram can then contain information relevant for both modeling and experimental work. Computer-aided design (CAD) can be very useful to synthetic biology. CAD allows engineers to spend more effort at the design stage and less at the construction stage by automatically performing many tasks that are currently performed by human researchers. The ability to automatically link models and experimental results will be one step in the development of practical CAD systems for synthetic biology.

The Impact of Technology on Creativity in Design: An Enhancement?

Technology may be considered as an interface between individuals and the products they create, but we have to determine whether the use of new systems effectively enhance individuals' creative activities. In this paper, we present a new angle of reflection that we illustrate in the field of creative design, since it is a constant challenge for designers to introduce creativity in the projects they work on. The approach we propose is centred on designers' cognitive processes. We argue that both the development of new CAD (computer‐aided design) systems and their assessment should be conducted on the basis of a deep understanding of designers' cognitive processes. In accordance with this view, we present three empirical studies that were conducted in order to analyse the impact of new design support systems on designers' cognitive processes. Therefore, the results we present contribute to further our knowledge of whether new CAD technologies effectively facilitate designers' activities and enhance their creativity.

Decision-making in preliminary engineering design

A designer often has to deal with complex and ill-structured situations during specification synthesis and preliminary engineering design. To assist in the development of computer-aided design systems, it is desirable to capture the designers decision-making process during these design states. The research presented in this paper is towards this direction. Based on the conceptual understanding of the process, three postulates are presented. The following two postulates; (1) the decisions are neither optimum nor just satisfying but retain certain characteristics of both, (2) the design is driven by the important objective(s) among all the specified objectives, at the preliminary design, although the remaining objectives do have a weak influence on the preliminary design; are used to develop a compensatory and a non-compensatory model of the decision-making. These models are formulated with the help of fuzzy set theory and they implicitly or explicitly follow the two postulates. These models are suitable for discrete decision situations where the above mentioned postulates apply. Examples of material selection during a preliminary structural design are used to illustrate the effectiveness of these models.

Development of a Decision Support System for Making Mold Specifications

This paper deals with the development of computer-aided design systems for mold designers. Specifically a model of design process for working out mold specifications and the program structure of a decision support system developed on the basis of such a model are considered. These are the nuclei of AI-CAD and design expert systems for mold designing. Major features of the design process model and the program architecture discussed in this paper may be summarized as follows : (1) The design process is presented in a new form different from such a fixed designing process as described in the existing CAD systems for molds. (2) All items in mold specifications which are called “design variables” in the design process are given as a set of attributes or functions. (3) The process for deciding on the solutions of design variables forms a hierarchical model consisting of three phases represented in the so-called “design knowledge”, including design strategy, a graphic representation of correlations, the values of attributes or functions, and design equations. (4) The knowledge base that forms an integral part of this system can be developed by directly rewriting the design knowledge formulated in the hierarchical model in accordance with the production rule. (5) Knowledge engineering and an optimization method are used in deciding on the values of those variables which are called “design solutions” in the design process. Choosing specifications of injection molds for a design task, this paper also discusses the development of knowledge and optimization processing modules for the decision support system for working out such mold specifications, and then proves the validity of these processing modules through case studies.

Development of computer-aided design systems for metal-forming processes

Computer-aided forging die design system FACT and roll pass design system DIAGNO have been developed for immediate use in small- and medium-size metal-forming industries. Some illustrative graphics and printouts of these systems appropriate for process evaluation are presented to describe their capability.

Description and development of a SAW filter CAD system

The authors present a description of the appropriate device models, design methods, and analysis techniques for a real-time surface acoustic wave (SAW) computer-aided design (CAD) system. The approaches presented have been successfully implemented in the creation of a fully integrated SAW filter CAD system for the design of bidirectional and three-phase unidirectional filters on a DEC VAX 11/750 system and for the design of bidirectional filters on an IBM PC-AT computer, which acts as an independent workstation. The focus is on bidirectional transducer design and analysis using the PC-based computer system. CAD analysis of a SAW bidirectional filter is compared to measured parameters. >