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Computing & Control Engineering Journal

Issue 1 • Date Feb. 1995

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Displaying Results 1 - 9 of 9
  • CADCAM wiring applications: using mechanical CADCAM systems for wiring

    Publication Year: 1995 , Page(s): 49 - 53
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (380 KB)  

    The author considers how considerable time and cost savings can be achieved by applying CAD/CAM techniques to many electrical wiring design, analysis and manufacturing applications. Because of certain difficulties, many CAD/CAM users have restricted themselves to simple 2D draughting, which is much more straightforward but of relatively little benefit. This is a great pity because the general-purpose CAD/CAM systems used by many electrical engineering companies can often be adapted to provide the necessary functions, such as wire routing analysis, and lead length calculations. Some of the technical issues are discussed in this article. Also the cases of two blue-chip companies, that have successfully adapted CAD/CAM systems to their wiring design, analysis and production requirements, are introduced to highlight some of the potential business benefits.<> View full abstract»

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  • Software engineering in an electronic engineering degree course

    Publication Year: 1995 , Page(s): 45 - 48
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (378 KB)  

    Software engineering practitioners must tackle their problems in the same way as those in other disciplines if they do not wish to end up in a situation in which nobody trusts the software produced. The author discusses the developments in computer science degrees and then considers software engineering in an electronic engineering degree course biased to microprocessors.<> View full abstract»

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  • Failsafe systems gain the flexibility of the PLC approach

    Publication Year: 1995 , Page(s): 43 - 44
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (179 KB)  

    Failsafe systems, which control potentially hazardous operations to ensure they are shut down if faults occur, have in the past traditionally been hard-wired installations. But there are serious drawbacks to the hard-wiring approach-an inherent inflexibility, and lack of data communications facilities, to name but two. These are prompting a growing move towards using specialised systems based on programmable logic controllers (PLCs) that are tailor-made for failsafe applications. The author considers how Newfield Automation has developed and installed a range of failsafe applications using PLCs since the company was founded in 1989. Its systems are based on the Siemens Simatic S5-115F PLCs, which are high-integrity units tailored for failsafe applications.<> View full abstract»

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  • Working together: a management summary of CSCW

    Publication Year: 1995 , Page(s): 37 - 42
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (522 KB)  

    Computer front-end support is directed primarily at aiding the work of the individual, or adding together the results of work done by individuals-so much so that small computers (PCs) are frequently referred to as 'personal productivity tools'. This article summarises key issues in applying information technology to support collaborative work.<> View full abstract»

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  • Nonlinear control of a 175 kW gas burner

    Publication Year: 1995 , Page(s): 29 - 34
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (402 KB)  

    Sliding-mode control systems offer an effective and mathematically exciting approach to the robust control of uncertain, often nonlinear, dynamical systems which are subject to external disturbances. This article outlines the fundamental properties of the design philosophy. The development of a tracking control scheme for a multivariable thermal problem including the results of plant trials is then described and discussed.<> View full abstract»

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  • Control configuration design for the aircraft gas turbine engine

    Publication Year: 1995 , Page(s): 22 - 28
    Cited by:  Patents (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (524 KB)  

    UK research into the design of multivariable controllers for gas turbines has been under way for several years. The results of simulation and engine test evaluations have been reported by Sutton (1991), and Shutler and Betteridge (1994). This article focuses on one aspect of multivariable controller design which is that of selecting outputs for closed-loop feedback control; this process is often referred to as control configuration design.<> View full abstract»

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  • Model-based control of a partial burn fluid catalytic cracking unit

    Publication Year: 1995 , Page(s): 17 - 21
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (311 KB)  

    A dynamic matrix controller (DMC) has been successfully installed on the fluid catalytic cracking reactor/regenerator section at RVI's Vohburg Refinery in Germany. A very short payback time was achieved based on increased feed processing and more stable regenerator operations (reduced catalyst addition rates). The controller has 6 inputs (manipulated variables) and 13 outputs (controlled variables). The application provides an excellent example of the importance of controlling processes at constraint limits. From the initial day of commissioning, the controller has stayed online and sustained a service factor of between 95% and 98% over an 11 month operating period. The limiting factor at the moment is the performance of the CO analyser. The controller has proved to be robust and operated well with constraints; it has handled disturbances effectively.<> View full abstract»

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  • VSTOL first flight on an H/sub infinity / control law

    Publication Year: 1995 , Page(s): 11 - 16
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (450 KB)  

    An H/sub infinity / control law has been successfully flight tested on the DRA Bedford Harrier. This and subsequent flight tests demonstrated the practicality and power of H/sub infinity / as a design tool for systems with multiple inputs and outputs. The technique has potential both to reduce design time, and to improve robustness and performance for such systems. This article discusses the development of the control law and some of the challenging implementation issues which had to be addressed in order to bridge the gap between theory and practice.<> View full abstract»

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  • Making advanced control work

    Publication Year: 1995 , Page(s): 5 - 10
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (503 KB)  

    The benefits which advanced control technology can bring are significant and varied. Benefits derive from greatly improved dynamic performance of aerospace systems or substantially improved profitability for process systems. An advanced controller on a catalytic cracking unit is quite capable of yielding extra profits of between $5 and $10 million per annum, for example. The fundamental principle underlying advanced control is that if one understands a system better one can make it perform better. The paper considers the evolution of successful implementations of advanced control, including hardware and software technology. It discusses the use of computer aided control system design.<> View full abstract»

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Aims & Scope

Published from 2003-2007, Computing and Control Engineering was concerned with computing, communications, control and instrumentation.

Full Aims & Scope