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Techno-economical inspection of high-speed internet connection for trains

IET INTELLIGENT TRANSPORT SYSTEMS 2008年第1期2卷 27-37页

作者： Riihimaki, V. Vaaramaki, T. Vartiainen, J. Korhonen, T. Aalto Univ Dept Commun & Networking FI-02015 Helsinki Finland Univ Jyvaskyla Dept Math Informat Technol FI-40014 Jyvaskyla Finland

Some attractive service scenarios for Railways' Intelligent Transport Systems (RITS) in three different user segments, that is, passengers, freight companies and train operator's in-house customers, are presented. The case study covers the analysis of customer needs and techno-economic evaluations. The analysis indicates that Flash-OFDM technology provides promising pre-stage solution for the train connections in Finland. Also, the WiMAX-based high-speed Internet access for passengers may be profitable in the most heavily operated railway leg in Finland. The sensitivity analysis shows that the most crucial parameters for the case are 'User Share', 'Average Revenue per User' and 'WiMAX Cell Size'. The analysis highlights the large economical potential for RITS services. It is possible, and also recommendable, to implement all the services for different user groups with the same hardware equipment. By this way, investment costs can be reduced noticeably. The in-house customers provide the most attractive service segment in the sense of net present value and reliability, by reducing operating costs and carriage investments while improving the management of operations in general.

关键词： techno-economical inspection Internet Metropolitan area networks RITS Radio links and equipment OFDM modulation sensitivity analysis railways Modulation and coding methods WiMax flash-OFDM technology computing in other engineering fields transportation WiMAX-based high-speed Internet access railway intelligent transport system customer need Computer communications

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Development of fast-response servos for military and naval systems - Part 2 - Simulation techniques

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computing & CONTROL engineering JOURNAL 2002年第4期13卷 206-213页

作者： Garner, F Kenilworth House Newport Shropshire TF10 9HJ 4 Church Road United Kingdom

In Part I of this article (June CCEJ, pp.127-136), a brief history of the development of servo drives for military applications was given. Then the design and performance of the laboratory hardware,constructed was described. Part 2 comments on results from system analysis mathematics and computer modelling work using Matlab/Simulink software. The article refers to computer modelling work currently being carried out and to future work.

关键词： fast-response servos systems analysis military systems computer modelling control system analysis computing naval engineering computing Military administration computing in other engineering fields Control technology and theory Civil and mechanical engineering computing Actuating and final control devices simulation techniques military computing Control system design and analysis Matlab/Simulink software servomechanisms software packages system analysis mathematics Marine system control Military control systems naval systems digital simulation

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Seamless real-time control systems - Challenges for the railway industry

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computing & CONTROL engineering JOURNAL 1999年第2期10卷 81-87页

作者： Chang, CS Bruce, AG Hampton, IM Mass Transit Railway Corp Hong Kong Peoples R China Kowloon Canton Railway Kowloon Peoples R China

Since the explosive growth of computing technology in real-time computer control systems during the 1970s, system integration has always required special attention. With the advent of networking technologies, system integration has become so complex that it often requires unique customised solutions, and despite the technological advances, system integration still remains a challenging problem to be resolved. This article explores the subject of applying system integration to the mass transit railway industry. Also included is an analysis of the problem from a process and technology viewpoint, and a look at the emerging technologies that promise to simplify system integration. A case study on a new system interfacing approach that is being followed in the design of Hong Kong's new West Rail line by Kowloon-Canton Railway Corporation is also described.

关键词： computing technology unique customised solutions emerging technologies Hong Kong Rail-traffic system control technological advances Traffic engineering computing real-time systems computing in other engineering fields mass transit railway industry railways West Rail line system interfacing approach transport control networking technologies system integration Control engineering computing case study seamless real time control systems real time computer control systems railway industry Kowloon-Canton Railway Corporation

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AUTOMOBILE ELECTRONICS IN THE 1990S .1. POWERTRAIN ELECTRONICS

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ELECTRONICS & COMMUNICATION engineering JOURNAL 1995年第1期7卷 23-36页

作者： CHOWANIETZ, EG Dept. of Electron. & Electr. Eng. De Montfort Univ. Leicester UK

The stringent automobile emission regulations introduced in the United States during the early 1970s meant that the all-mechanical automobile faced an uncertain future. Automotive engineers quickly adopted electronic engine-control strategies as a solution to their problems. Crucial links between the automobile and electronics were quickly formed. Subsequently, the availability of inexpensive microprocessors has led to a revolution in automotive control systems. This paper, the first of two on the subject, presents an introduction to the features and capabilities of automobile electronic systems. Since the area is a vast one, the discussion is initially restricted to a description of the more commonly encountered control systems, specifically engine management and transmission control. A second paper deals with other, more recently developed systems such as electronically-controlled antilock braking (ABS) and electrical power-assisted steering (EPAS).

关键词： microcomputer applications automobile electronics internal combustion engines Pollution control automotive electronics engine management digital control powertrain electronics computing in other engineering fields automotive control systems USA air pollution control Automobile electronics engine control strategies Environmental issues transmission control Road-traffic system control automobiles Control of heat systems Control engineering computing Automobile industry microprocessors automobile emission regulations

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UNMANNED PLATFORMS NEED MULTIFUNCTIONAL CONTROL

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computing & CONTROL engineering JOURNAL 1994年第6期5卷 274-276页

作者： BOOTHROYD, D

The North Sea is not for the faint-hearted. It is well known that working as a diver on gas and oil wells there is one of the most dangerous of all occupations. While the designers of control systems for unmanned plat... 详细信息

关键词： Fuel processing industry electrical power Power engineering computing Production engineering computing hydraulic power Ann subsea development subsea wellhead control modules computing in other engineering fields North Sea natural gas technology Control applications in mining, oil and natural gas technology electrical control signals multifunctional control unmanned platforms petroleum industry Audrey B power system control Control engineering computing control station Chemical engineering computing methanol Mining, oil drilling and natural gas industries oil technology Phillips Petroleum Company United Kingdom Limited Industrial processes Industrial applications of IT gas wells industrial control

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COMPUTER-AIDED MAINTENANCE MANAGEMENT-SYSTEMS

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computing & CONTROL engineering JOURNAL 1994年第4期5卷 189-192页

作者： JONES, R MCP Management Consultants United Kingdom

Computers have been used in maintenance for over 20 years, and many users claim to be 'world class' or adopting 'best practice'. However, from the analysis of 725 AMIS maintenance management audits, the results would suggest that over 60% of companies are not satisfied with their system and cannot demonstrate clear benefits from operating these systems. In many instances computer systems have actually created additional work and are driving the management process rather than being a tool supporting the process. This article highlights some of the main reasons for lack of success in the use of CAMMS and suggests a better way forward.

关键词： computer systems additional work maintenance engineering engineering computing Maintenance and reliability computer-aided maintenance management systems AMIS maintenance management audits best practice computing in other engineering fields

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APPLICATION OF PARALLEL PROCESSING TECHNIQUES TO EDDY-CURRENT NDT INSTRUMENTATION

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IEE PROCEEDINGS-D CONTROL THEORY AND APPLICATIONS 1990年第4期137卷 211-222页

作者： BAHRAMPARVAR, MR GRAY, JO Department of Electronic & Electrical Engineering University of Salford Salford UK

A model-based fault diagnostic procedure is proposed for an eddy-current test instrument which utilises the multiple model estimation algorithm (MMEA). This algorithm essentially consists of a set of Kalman filters and is an ideal candidate for realisation by parallel-processing techniques. A practical instrument has been developed, consisting of a commercially available eddycurrent test instrument linked to a parallel processor consisting of an array of 4 transputers. A set of tubular metal samples, with known inner and outer wall defects, has been fabricated to enable the performance of the experimental instrument to be evaluated, and some practical results are given in the paper.

关键词： parallel processing computerised instrumentation eddy-current test instrument parallel algorithms Electromagnetic induction computing in other engineering fields eddy current testing Materials testing Kalman filters multiple model estimation algorithm Computerised instrumentation model-based fault diagnostic procedure NDT transputers automatic test equipment

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ELECTRONIC AUTOMATION OF THE WEIR GATES ON THE RIVER THAMES

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JOURNAL OF THE INSTITUTION OF ELECTRONIC AND RADIO ENGINEERS 1988年第1期58卷 19-27页

作者： ATKINSON, P WALKER, JR PETERS, NK THAMES WATER AUTHOR NUGENT HOUSEVASTERN RDREADING RG1 8DBENGLAND

The Thames Water Authority recently commissioned a feasibility and design study to investigate the possibility of electronically automating the operation of the weirs along the Thames. The results of this study are incorporated in this paper and show that it should be possible to maintain the water level of each reach, measured with precision level sensors mounted above each weir, to within the order of ± 10 mm of a preset level at all times, regardless of water inflow rates, by the use of a distributed computer-based monitoring and control system. The design of this system relies on the use of an equivalent lumped rectangular cross-section model of a reach. The proposed strategy has been illustrated using data for the reach upstream of Caversham Weir and for the eight motorized weir gates at Caversham, Reading. The design has been verified using computer simulations which demonstrate that the system should be sufficiently robust to handle the expected variation of plant *** system will be operated by a lock-keeper during daylight working hours, but will otherwise be unmanned. Accordingly, detailed consideration must be given to the practical implementation of the system so that it will provide the required degree of reliability and will degrade gracefully and fail safe. The paper discusses how these requirements may be achieved.

关键词： River Thames Control applications in other natural resources electronic automation weir gates distributed computer-based monitoring digital simulation Thames Water Authority equivalent lumped rectangular cross-section model computing in other engineering fields computer simulations Reading Control engineering computing distributed control computerised control control system Caversham Weir computerised monitoring reliability rivers Natural resources and environmental control

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A MICROCOMPUTER-BASED AUTOMATIC-CONTROL STRATEGY FOR A RUBBER EXTRUSION PRODUCTION LINE

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SOFTWARE & MICROSYSTEMS 1985年第5-6期4卷 145-152页

作者： STOTEN, DP ROONEY, BG UNIV BRISTOL DEPT MECH ENGNBRISTOL BS8 1TRAVONENGLAND AVON TYRES PLC MELKSHAMWILTSENGLAND

The paper describes the initial stages and immediate aims of an engineering project to control a tyre tread production line. The line is part of the Avon Tyres pic plant at Melksham, Wiltshire. The paper specifically describes the modelling, automatic control, hardware and software developments that are (and will be) used as a basis for the continuation of the project. Ultimately, the technology developed and expertise gained on the project will be extended to the control of other plants within the Avon group.

关键词： tyre tread production line rubber extrusion production line Control engineering computing microcomputer applications Avon Tyres computerised control control engineering computing automatic control software developments rubber industry Rubber and plastics industry engineering project computing in other engineering fields

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NON-LINEAR CONTROL OF A PAPER-STOCK FLOWBOX

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IEE PROCEEDINGS-D CONTROL THEORY AND APPLICATIONS 1983年第3期130卷 131-136页

作者： GUNN, DJ SINHA, AK Department of Chemical Engineering University College of Swansea Swansea UK

The paper deals with the design of controllers for a paper-stock flowbox using nonlinear models derived from equations representing the dynamics of slurry flow and pressurised air in the box. Three control schemes have been considered, namely interactive control, noninteracting control and complementary interacting control. The control schemes have been compared by digital simulation of the box and controllers. Noninteractive control shows significant improvements over the dual-control interactive scheme but the best control is given by the complementary interactive scheme.

关键词： Nonlinear control systems pressure control Level, flow and volume control paper-stock flow box paper industry Control applications in wood-processing, pulp and paper industries complementary interacting control digital simulation noninteracting control nonlinear control systems computing in other engineering fields Control technology and theory control system synthesis dual-control Control engineering computing flow control slurry flow interactive control Pressure and vacuum control Paper and pulp industries Industrial applications of IT interactive systems Control system analysis and synthesis methods

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