By Topic

Popular Articles (November 2014)

Includes the top 50 most frequently downloaded documents for this publication according to the most recent monthly usage statistics.
  • 1. Real-time collision avoidance in two-armed robotic systems

    Page(s): 233 - 240
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1080 KB)  

    Owing to the complexity of certain tasks, in particular those within a hazardous environment, there is a perceived need for robotic systems to have two-armed flexibility. The practical realisation of a teleoperated two-armed manipulator system raises a number of problems regarding operation and control. Of particular note is the problem of collision avoidance between the arms in real-time. A review of current techniques has shown a reliance on accurate knowledge, both of the environment and of the manipulator. Whereas collision avoidance with the environment will depend on sensors and the operator's skill, that between the two arms can be best left to the robot's controls system. A possible solution for collision avoidance is presented, which depends on the individual links of the manipulators being modelled as a number of spheres View full abstract»

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  • 2. Functional requirements and conceptual design of the feature-based modelling system

    Page(s): 9 - 15
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (556 KB)  

    The databases of contemporary CAD systems cannot be used to drive most CAE and CAM systems in an automated manner since CAD systems do not produce a complete product definition. The information that is supported is in the form of low-level details, from which higher-level information such as form features cannot be obtained easily. This paper describes the functional requirements of a system that will be capable of overcoming these deficiencies. FBMS consists of an advanced solid modelling shell and a feature mapping shell, offering richer data structures and the application of artificial intelligence techniques to geometric modelling View full abstract»

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  • 3. The cost management system project

    Page(s): 198 - 201
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1415 KB)  

    One of the obstacles to the successful application of computer technology to manufacturing is the failure of existing cost management practices to provide the financial information necessary for a company to manage the transition to automated manufacture. CAM-I's Cost Management System project aims to establish a standard body of cost management knowledge which will support the implementation of computer integrated manufacturing. View full abstract»

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  • 4. The development of a computer-aided design course for undergraduate students of engineering science

    Page(s): 118 - 121
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (949 KB)  

    This paper reports the establishment of a computer-aided design course for undergraduate students of engineering science at Exeter University. In the first part the background against which the course was developed is outlined, together with its relationship to other courses in the Department of Engineering Science. The second part discusses the opportunities for more specialist courses in computer-aided engineering evolving from the experience of running the CAD course. View full abstract»

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  • 5. Planning and implementing CIM

    Page(s): 167 - 176
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1276 KB)  

    Computer-integrated manufacturing (CIM) has been motivated by the desire to achieve the high levels of flexibility, productivity, quality, and adaptability that are necessary for a company to remain competitive. However, CIM will not happen at all if management does not plan for it. This article describes the process of planning and implementing CIM, and discusses its important issues. The process encompasses the building of both the CIM manufacturing structure and infrastructure, and involves setting the product, market, and manufacturing strategies, developing a CIM plan, and implementing the plan View full abstract»

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  • 6. Computer-aided design of high-frequency electromagnetic devices using the finite-element method

    Page(s): 185 - 189
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (778 KB)  

    The finite-element method has been used in the electromagnetic analysis of a wide range of devices from microwave to optical frequencies. Established early on as a means of finding waveguide modes, it has more recently been applied in the determination of equivalent circuit parameters for arbitrarily shaped N-port devices such as phase changers, directional couplers and circulators. What is needed now is an integration of the various finite-element methods into a software package for high-frequency electromagnetic design. View full abstract»

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  • 7. GBASE - a generalised database mangement system for CAD

    Page(s): 207 - 212
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1276 KB)  

    To both standardise and speed the development of software for computer-aided design systems a portable and powerful database structure and management system is required. Such systems are often produced on an ad hoc basis to satisfy current needs. This paper discusses a database structure which can satisfy many of the basic requirements of today, while being expansible for the future. View full abstract»

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  • 8. Tolerance analysis and design of electronic circuits

    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1509 KB)  

    An unwelcome factor in the design of electronic circuits is the variation in component values resulting from the tolerances associated with manufactured components. The corresponding variations in circuit performance can often be great enough to cause the specifications of a circuit to be violated. Although appropriate corrective action is not easy to establish, with suitable software improvements can be obtained through tolerance design. View full abstract»

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  • 9. Survey of CAD/feature-based process planning and NC programming techniques

    Page(s): 25 - 33
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (968 KB)  

    Methods for automated process planning and NC programming are surveyed and classified into generic categories. Aspects of CAPP investigated include part definition methods, reasoning and search techniques used to generate process plans, both Al-based and traditional, and process planning languages. NC programming techniques have been categorised into those based on cell decomposition, volume/delta volume decomposition, sectioning, and geometric reasoning. Methods for simulation and verification of NC programs are also surveyed. The current state of the technology and the advantages and shortcomings of each of the CAPP and NC programming generic methods are also discussed View full abstract»

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  • 10. Engineering analysis for design optimisation of differential transformers

    Page(s): 51 - 53
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (292 KB)  

    Design optimisation is a primary objective in computer-aided engineering. In the paper the optimisation of a linear variable differential transformer is used as an example. The study shows two typical features of computer-aided engineering: first that analysis techniques can be used to give measurements of system parameters that could not be achieved in a practical experiment; secondly that the design optimisation involves application-specific extensions to the basic techniques. Using the data from computer-evaluated measurements a transducer design which gives a linear output voltage is achieved View full abstract»

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  • 11. Product innovation and mechanical CAD: a strategic proposal for engineering manufacture

    Page(s): 153 - 158
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (468 KB)  

    This paper gives an appraisal of how current mechanical computer-aided design (CAD) technology may be best used within the product innovation strategies that have been identified and recorded. In this connection, the paper focuses on and reviews the implications of CAD with respect to the interdependent issues of new product strategy, the product design spectrum, and product lifecycles. On the basis of the review, it is proposed that these issues must shape present and future CAD implementation and application policy within any manufacturing business attempting to be successful in competitive markets View full abstract»

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  • 12. Using CAD/CAM in the design of a robotic micromanipulator

    Page(s): 43 - 48
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (652 KB)  

    The use of CAD/CAM techniques for the design of a micromanipulator is described. All design issues which addresses local and global objectives are analysed from the optimisation point of view. Computer simulations written in Fortran and APL, nd three large-scale software application systems, CADAM, CATIA, and CAEDS, are used to model, analyse and manufacture micromanipulator components. Both kinematic and dynamic model formulations are used to determine an improved, near optimal, design for the micromanipulator View full abstract»

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  • 13. Computer modelling of a manufacturing process

    Page(s): 205 - 211
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (400 KB)  

    The application of computer modelling can involve considerable savings, with a reduction in costs, time taken to manufacture products and the amount of floor space occupied; thus optimising the process. The article examines the use of computer modelling in a sheet-metal manufacturing process, at DCE Ltd., Leicester, and demonstrates the savings to be made. The modelling package used was Simcon's PC MODEL linked to a database held on LOTUS 123 spreadsheet software View full abstract»

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  • 14. Computer-aided design, manufacture and test of printed circuit boards at IBM

    Page(s): 49 - 53
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (932 KB)  

    IBM is committed to computer assistance in the design, manufacture and test of printed circuit boards. As a result of the company's worldwide organisation, it is impossible to share databases between development and manufacturing systems. However, the use of formal data interfaces enables the integration of the separate processes of design, manufacture and test into what is effectively a single CADMAT system. View full abstract»

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  • 15. A knowledge-based approach to foundation design

    Page(s): 165 - 172
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (484 KB)  

    The feasibility of integrating heuristic knowledge with numerical tools using the `KBASE' knowledge-base expert system shell to automate the selection and the design of foundation for land-based structure is reviewed. The approach and the methodology of organising knowledge in the development of a knowledge-based program is discussed. An expert system SOFT, which is based on these principles, is being developed at the Nanyang Technological Institute in Singapore View full abstract»

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  • 16. A microcomputer-aided system for selecting arc-welding process parameters

    Page(s): 122 - 125
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (212 KB)  

    The finite-element method is used to establish a mathematical model of heat transfer in arc welding. The 800-500°C cooling time (the t8/5 time) of the metal adjacent to the weld junction can be precisely calculated by the model. The quantitative relationships between the welding process parameters, the value of t 8/5, the microstructures and the properties of a welded joint are set up, based on experiential formulae and data. A microcomputer-aided system for selecting the arc-welding process parameters has been developed, based on these relationships. The system is designed to run on an IBM-PC or compatible computer View full abstract»

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  • 17. Towards integration of computer-aided design, manufacture and production mangement

    Page(s): 240 - 244
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2120 KB)  

    The development of `islands of automation¿¿ was in many ways an inevitable result of the implementation of an emergent automation technology by manufacturing companies organised as a series of independently administered departments. At the time of introduction there were even benefits to this approach to new technology. However, the need to extend automation into areas as yet untouched has led to the requirement of a strategic plan to link these islands. View full abstract»

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  • 18. The fifth generation, engineers and knowledge engineering

    Page(s): 21 - 23
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (459 KB)  

    The new fifth generation of computers, now under development, will build upon but not replace the knowledge of engineers. In this paper knowledge engineering concepts are de-mystified with examples from motor vehicle engineering. View full abstract»

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  • 19. Combining inductive and deductive reasoning

    Page(s): 24 - 28
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1274 KB)  

    Work in artificial intelligence has shown that rule induction is a useful aid to knowledge acquisition but that its general applicability is limited. In particular, induced rules can be difficult to understand and hard to modify. This paper describes a computer program to generate knowledge bases from examples in a form which can be interpreted either as a set of rules or as an inference network. The rules are readily understood so that the structure can be modified by the expert into a form that the program will tune again to fit the examples. This new tool for analysing data/knowledge draws together two very different techniques, inductive and deductive, used in building expert systems. View full abstract»

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  • 20. An intelligent knowledge-based system to provide design and manufacturing data for forging

    Page(s): 56 - 61
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1100 KB)  

    This paper describes current progress on the combination of finite-element programs for metal flow simulation with die design programs in an IKBS. The principle is that the designer will interrogate the knowledge base to discover whether a component with relevant characteristics has been manufactured before, or falls within the scope of its empirical rules base. If so, the CAD program proceeds directly to an evaluation and, if required, to NC or CNC tool manufacture. If the shape is not recognised, the finite-element program can be called into action for analysis of the stress, strain, strain rate and temperature distributions. From this the pre-forms and die designs can be optimised and the shapes passed to the CAD branch for detailing and subsequent production. View full abstract»

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  • 21. Test education for students and industry at Brunel University

    Page(s): 176 - 178
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (631 KB)  

    There are at present very few higher educational establishments that are approaching the teaching of electronics design for testability in any realistic way. However, Brunel University has made efforts to include test topics in undergraduate, postgraduate and industrial courses, and for the future has plans to establish an Institute of Test Engineering. View full abstract»

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  • 22. A rationalised approach to the application of CAD within mechanical product design

    Page(s): 213 - 216
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1517 KB)  

    This paper reviews the nature of the product design process by focusing on the types of design that arise throughout the life cycle of an engineering product. It is proposed that considerations of `design by evolution¿¿ and `design by innovation¿¿ should be carefully assessed as fundamental criteria when formulating decisions on the adoption and implementation of CAD within mechanical product design. It is further suggested that, within the conceptual boundaries of product design, the application of CAD techniques may accelerate a product's progression from the state of innovatory design towards the evolutionary design condition. View full abstract»

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  • 23. Techniques for designing production systems

    Page(s): 157 - 159
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (597 KB)  

    While individual production technologies are developing rapidly to meet modern manufacturing objectives, emphasis now needs to be directed towards finding ways of maximising their effectiveness when the various components are combined into systems. In supporting the optimal designs of complex systems like FMS, new tools are required that not only follow a systems approach but also attempt to prescribe a system design. This paper provides some background to FMS design, briefly reviews several supporting design techniques, and highlights the need for new tools that will lead to more effective systems. View full abstract»

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  • 24. BCL-the industrial CNC standard

    Page(s): 54 - 56
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (192 KB)  

    In 1983 the Electronics Industries Association published the standard RS-494, commonly referred to as BCL (binary cutter location) data exchange format. BCL is a means of standardising the formats for NC part programs. Its aim is to eliminate the cost and confusion associated with multiple postprocessors and enable the portability of part programs among different machine tools. The article gives a review of BCL and its introduction. It also discusses the nature of BCL data, its implementation aspects and the advantages it offers the NC industry View full abstract»

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  • 25. The application of a biarc technique in CNC machining

    Page(s): 54 - 60
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (392 KB)  

    It is frequently necessary to machine a contour which has been defined by discreet co-ordinate information. Traditionally, this had been achieved by contour-fitting procedures such as mathematical, parametric or B-splines. A technique has been established for fitting circular arcs to such data to give smooth curves. This article describes how that technique may be used on a PC to generate numerical control (NC) data. A successful machining exercise is detailed View full abstract»

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  • 26. Structured knowledge engineering: a Yourdon-based approach to the analysis and design of KBS

    Page(s): 61 - 68
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (388 KB)  

    The tasks of analysing and designing knowledge-based systems (KBS) are put into a structured framework. In order to do this, a structured lifecycle for knowledge-based systems is introduced, as well as some tools that allow both the taking of a structured approach and the production of appropriate structured models of the knowledge domain. The authors look first at the process of KBS design to compare and contrast one of the most commonly used design methods, i.e. prototyping, with a structured design method. Making use of terminology introduced by Yourdon (1989) to characterise system projects, the author shows how the adoption of the more formal structured approach need not lead to any loss of the `freshness' that is claimed as the characteristic of a prototyping approach. The various stages of analysis and design are analysed in order to introduce the tools needed to construct the structured models of the knowledge-based system. A very simple example is used to illustrate the ideas expressed View full abstract»

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  • 27. Artificial intelligence in process planning

    Page(s): 153 - 156
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    Both the changing demands of the market and keen competition among manufacturers call for a more flexible approach to manufacturing. Adopting conventional computing methods is not adequate to meet the sophisticated needs of the modern manufacturing industry. The authors describe the approach of applying artificial intelligence techniques to process planning. An analogy between artificial intelligence planning and process planning is made. To illustrate this, the `blocks world' is compared with the assembly of the piston connecting rod of car engines View full abstract»

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  • 28. GCAPPS-a computer-assisted generative process planning system for turned components

    Page(s): 163 - 168
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (368 KB)  

    The authors report the design and implementation of a computer-assisted process planning system for turned components used in the batch manufacture of portable electric tools. The software incorporates modules for component geometry representation, automatic selection and sequencing of machining operations, process parameter selection, machine and tool selection, time and cost calculation and report generation. The user-friendly package has been developed for an IBM PC XT compatible system and has been extensively tested for a large group of turned components. It provides a quick and efficient method of generating consistent process plans View full abstract»

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  • 29. Selecting and evaluating cost-effective CADCAM

    Page(s): 33 - 38
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (588 KB)  

    Investment appraisal is an essential, and integral, part of the process of specifying a CADCAM system. This paper shows how the problems of evaluation can be overcome, and lists of the main areas of costs and savings are provided so that companies can identify their own requirements. The effect of expanding CAD into CADCAM is discussed, and it is suggested that CAD and CAM have to be dealt with separately View full abstract»

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  • 30. Shape models in computer integrated manufacture-a review

    Page(s): 103 - 112
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1568 KB)  

    Existing computer-aided manufacturing systems are based on models of shape tailored to a particular process. Computer integrated manufacture involves many different processes, and hence requires more complete models of components or assemblies. This can be provided by solid modelling techniques extended to include extra data related to manufacture such as form features and tolerances. These developments are being applied to many manufacturing processes, from casting to assembly, but profound questions remain concerning both the structure and the use of shape models in manufacture View full abstract»

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  • 31. Design of engine cover system using FEA

    Page(s): 98 - 102
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (536 KB)  

    This article describes the effective use of CAD/CAE in the design and analysis of a rocker arm cover system. Non-linear finite-element analysis (FEA) is used to predict the behaviour of the rocker arm cover and the associated sealing system under applied load. The geometry of the cover, which is relatively complicated, is generated with state-of-the-art commercial software and then transferred to the FEA package. The computer simulation is compared with the experimental results, and the agreement is quite satisfactory View full abstract»

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  • 32. Software engineering tools for system development

    Page(s): 116 - 121
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (452 KB)  

    With the increasing cost of application system development, the lack of skilled personnel and the growth in the demand for new systems, data processing managers are being forced to consider new approaches to system development. The use of software engineering methods and practices have gone some way towards solving their problems. However, although software engineering methods provide increased quality, the need to further raise development efficiency is still required. This article describes the use of computer-aided software engineering (CASE) tools as a solution to the problem of the growing `software backlog' View full abstract»

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  • 33. Electronic breadboarding reduces time to market, raises manufacturing yield

    Page(s): 207 - 214
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (484 KB)  

    This paper introduces a new class of CAE analysis tool-electronic breadboarding. Electronic breadboarding is an extension to simulation with a much higher level of interactivity and with a focus on finding design problems, not just predicting results. A comparison of electronic breadboarding to traditional breadboard testing shows the pros and cons of both and synergy in using the two together to reduce overall product development time View full abstract»

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  • 34. Integrating solid modelling with finite-element analysis

    Page(s): 133 - 137
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (763 KB)  

    This paper presents an approach to the integration of computer-aided design and finite-element analysis. Starting with a solid modelling system for the definition of the desired structure/component, a modified octree sub-division technique is used for the automatic generation of the finite element meshes. This mesh information, together with the material properties and boundary conditions, is subsequently used as input to a finite-element analysis package. An algorithm for ensuring valid meshes between interface elements is described, and the results of an example run with the system are also presented. View full abstract»

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  • 35. The Joint Test Action Group

    Page(s): 121 - 122
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (936 KB)  

    First Page of the Article
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  • 36. Experiences with CAD solids modelling and its role in engineering design

    Page(s): 38 - 44
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1360 KB)  

    Mather & Platt has established a reputation as a leading exponent of CAE in the mechanical engineering sector. This paper demonstrates the increasingly important role of solids modelling in the field of engineering design, highlighting its application as a design visualisation tool. A number of case studies are described to illustrate the variety of work pursued in the two years that this new facility has been in productive use at Mather & Platt. In contrast to the visually impressive products of solids modelling and the advantages to be gained from its successful exploitation, some of the pitfalls and problems experienced are also cited. View full abstract»

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  • 37. The selection, installation and operation of CAD systems

    Page(s): 227 - 233
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1487 KB)  

    An introduction is given to CAD in its various forms and the three stages of equipment selection, installation and operation are described. An attempt is made to illustrate the major pitfalls facing both management and design staff along the way, and it is hoped that this will help to save both time and money for potential users of CAD systems. Other aspects which arise from the increased use of this new technology, such as security, are also discussed, and finally some indicators are offered to predict future trends. View full abstract»

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  • 38. Advances in steam turbine-generator design and manufacture using computer technology

    Page(s): 182 - 188
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1703 KB)  

    General Electric Company's Steam Turbine-Generator Business has developed and is implementing a programme to integrate the use of advanced computer technology in its turbine-generator design and manufacturing operations. A shared product database will provide the foundation for the integration of engineering, manufacturing and business systems. View full abstract»

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  • 39. The application of CAE to the design and development of the UNISAT television antenna

    Page(s): 123 - 131
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2125 KB)  

    The television antenna on board the UNISAT spacecraft will be used to broadcast television signals direct to individual households within the UK. The realisation of this highly complex antenna, right through from preliminary electrical design trade-offs to final electrical testing, is dominated by CAE techniques, either in the form of software tools for design analysis or through computer control of manufacturing and testing equipment. View full abstract»

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  • 40. Computer simulations in engineering education - rationale

    Page(s): 36 - 41
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (729 KB)  

    Computer simulations can complement, extend and occasionally replace conventional elements in engineering education. Recurrent costs of this form of computer-based learning are comparable with the costs of teaching laboratories. Acceptance by the academic community demands ease of assimilation and implementation. Development costs of effective computer simulations are high and some form of central funding is required. View full abstract»

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  • 41. Some problems in implementing computer-aided engineering - a general review

    Page(s): 25 - 31
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1383 KB)  

    New computer-controlled systems are likely to be installed throughout the engineering industry over the next few years. However, the integration implied by computer-aided engineering is not without its problems. View full abstract»

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  • 42. Computer aids in power system engineering

    Page(s): 217 - 225
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (568 KB)  

    CAE is used extensively in power systems to plan, design and operate generators, transmission circuits and sub-stations. This tutorial paper describes CAE methods for steady-state, transient and dynamic calculations, and shows that the use of computing systems and dedicated microprocessors is important in controlling and protecting all types of system View full abstract»

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  • 43. Computer-aided software engineering

    Page(s): 113 - 120
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (700 KB)  

    Addresses software and its development methods and tools, pointing out the special factors that appear to make software different. The paper starts with a discussion of the problems and the solution of treating software development as an engineering activity. Much software development is office work, and general computer aids for the support of office work are described. This leads into a discussion of the typical activities involved in the development of software, and the lifecycle. Then, for each typical activity, the methods and tools are outlined, leading to a discussion of the need to integrate tools and the possible future developments of software engineering and its tool support View full abstract»

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  • 44. A general purpose accelerator for digital system design

    Page(s): 99 - 103
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    With the growing acceptance of simulation tools for the analysis and verification of digital circuits, and the ever increasing complexity of digital system designs involving multiple ASICs and complex commercial VLSI components, designers are demanding increased performance from the design tools. This paper outlines the problems associated with accelerating design verification tools focused for system-level design. The architecture of a commercially available general purpose hardware accelerator is then described to see how these problems can be addressed View full abstract»

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  • 45. Methods for the development of man-machine interfaces with application to CIM

    Page(s): 59 - 64
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (480 KB)  

    CIM has the aim of integrating the design, development, planning, manufacturing and marketing processes by providing comprehensive information and user-specific solutions. The author examines the state of the art in the design and development of good user interfaces and highlights some of the features of the Papillon Prototype system developed under the ESPRIT research programme. The Papillon tool sets support both the development of CIM applications and the automatic generation of configurable, portable and friendly user interfaces View full abstract»

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  • 46. Selection of computer systems to meet end-user requirements

    Page(s): 52 - 58
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (564 KB)  

    The sequence of procedures that should be adopted are discussed. The first step is to carry out a feasibility study. This involves consultation with end-users, demonstrations, benchmark tests, and consideration of: future system upgrades, and enhancements; system obsolescence; enhancement of existing systems; software packages; and staffing. Once the feasibility study is complete and a budget approved, a detailed requirements specification can be drawn up. An invitation to tender (ITT) should then be drawn up. The elements a vendor should supply in their tender document are noted. The vendors are then shortlisted based on a technical evaluation, cost comparisons and consideration of contractual arrangements. Once an agreement has been reached with the vendor the system can be ordered, installed and acceptance tests carried out. Training and maintenance then become important View full abstract»

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  • 47. An information management system for engineering design based on hypertext

    Page(s): 189 - 193
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (356 KB)  

    Presents the results of an investigation which should clarify whether it is feasible to use a hypertext system for the data management of a VLSI design system. A short introduction into the Electronic Design Interchange Format (EDIF) is given, as the hypertext scheme for design data is based on EDIF. The main issues of the hypertext paradigm are reviewed, and the HyperEDIF system is presented. HyperEDIF is based on a commercially available hypertext system and contains a schema for the management of VLSI design data. The knowledge gained during the development of this system is also reported. The consequential demands placed on a hypertext system to be used for design data management are discussed in detail View full abstract»

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  • 48. Variant design as a method of automating the design process

    Page(s): 97 - 102
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (496 KB)  

    This paper describes the design process within a CIM environment, where automated information processing is expected. Two options for structuring the design process are discussed, namely form and variant design systems. The variant design process is shown to provide advantages which offer a rapid path to integration. While the form design system also potentially provides the same advantages, and for a more general range of products, it is shown that the systems described have yet to be proved. For companies adopting the variant design philosophy, the problems of program generation are discussed, and suggestions are made to improve program quality. An extensive case study fully depicts the implementation of a variant design system View full abstract»

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  • 49. A CAE tool for pavement design and management

    Page(s): 139 - 146
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (364 KB)  

    Describes a CAE package, supplemented by a powerful database handler for storing geotechnical data of any given geo-map for the design, analysis and management both rigid and flexible pavements. Pavement design and analysis are based on the American Association of State Highway and Transportation Officials (AASHTO) guide. The cost and performance of different maintenance strategies on flexible pavements can be undertaken and evaluated. The database is based on a hierarchical data structure which provides speed and flexibility of information access as well as expansibility. The menu-driven package guides the user through the different steps involved in the design, analysis graphs, and maintenance strategies for pavement rehabilitation. Throughout the design stage, the user has the option of using the information stored in the database or relying on their own data. The design and analysis of pavements, complemented by a geotechnical database makes this package a powerful CAE tool for civil engineering pavement designers View full abstract»

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  • 50. Communicating design representations: the role of interpretation

    Page(s): 153 - 159
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (456 KB)  

    The development of integrated computer systems in the fields of architecture, engineering and construction (AEC) requires a viable scheme for data exchange between professional groups. Data exchange capability has two essential components: representation standards and feature extraction. A representation standard is an agreement among AEC professions about a common problem description language. Feature extraction is a process by which a particular professional entity derives a domain specific representation i.e. an interpretation, from a common representation. The roles of standards and feature extraction can be understood in terms of their relation to the overall problem-solving structure. This article presents a communication architecture for integrating AEC design data based on the principle of local interpretation of a low-level graphic exchange language. A prototype implementation is described View full abstract»

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