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IEE Colloquium on Fault Diagnosis in Process Systems

21 Apr 1997

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Displaying Results 1 - 11 of 11
  • IEE Colloquium on Fault Diagnosis in Process Systems (Digest No.1997/174)

    Publication Year: 1997
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (80 KB)

    The following topics were dealt with: a user's view; traction control rapid prototyping; clinical analysers; industrial process manufacturing; neural nets and multivariable SPC; CHP heat recovery systems; IKBS; nuclear processing plants; tool condition monitoring; pipeine observation; and the Orsted satellite View full abstract»

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  • Tool condition monitoring in metal cutting through application of MLP neural networks

    Publication Year: 1997, Page(s):9/1 - 9/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (232 KB)

    This paper describes preliminary results of the application of feedforward multilayer perceptron (MLP) neural networks for cutting tool state identification in a metal turning operation. Test cuts were conducted using carbide inserts with and without wear on alloy steel and the acquired data used to train and test the generalization capabilities of two MLP configurations. Obtained results for succ... View full abstract»

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  • Fault diagnosis of a nuclear processing plant at different operating points using neural networks

    Publication Year: 1997, Page(s):8/1 - 8/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The process under investigation in this work is the integrated dry route (IDR) process of British Nuclear Fuels plc. (BNFL), which is a nuclear fuel processing plant, where non-catastrophic faults are known to occur and a reliable early fault diagnosis scheme was required for operator advice. This paper describes the application of artificial neural network techniques to the diagnosis of non-catas... View full abstract»

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  • The role of knowledge based systems in fault diagnosis in applications using human operators

    Publication Year: 1997, Page(s):7/1 - 7/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    Many processes rely on human operators as part of their control and fault diagnosis hierarchy. The use of knowledge based systems in such applications presents special problems. The issues are discussed in terms of practical experience in chemical applications and in anaesthesia, concentrating on the issues of knowledge and ownership, nature of faults, fault diagnosis and actions for operators, an... View full abstract»

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  • Fault diagnosis-a user's view

    Publication Year: 1997, Page(s):1/1 - 110
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (720 KB)

    It is explained that the increasing complexity of industrial plants makes the diagnosis of faults more difficult. There is a need for an automated system that detects faults and presents a list of possible causes. The ways in which humans find faults are discussed. Besides its having good fault finding logic, it is also helpful for a plant to be designed for ease of fault finding and of the replac... View full abstract»

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  • Fault detection for pipelines: a nonlinear observer approach

    Publication Year: 1997, Page(s):10/1 - 10/9
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    This paper considers a problem associated with the transportation of oil through a pipeline, possibly from an oil rig. A hydraulic hose, known as a sub-sea umbilical, is used to open or close a valve which controls the oil flow in a larger pipeline. A linear state-space model is described, including model terms for the faults. A general linear unknown input observer is then proposed and an example... View full abstract»

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  • Rapid prototyping of a sensor fault tolerant traction control system

    Publication Year: 1997, Page(s):2/1 - 2/6
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (556 KB)

    The problem of sensor faults on an AC-drive system for an electric train is considered. Intermittent disconnections of these sensors produces severe transient errors in the estimator in the control loop if not heavily filtered to suppress these errors which will degrade performance. This paper shows that model based techniques can be applied for achieving reliable tolerance of intermittent disconn... View full abstract»

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  • Fault-tolerant control-a case study of the Orsted satellite

    Publication Year: 1997, Page(s):11/1 - 1113
    Cited by:  Papers (120)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (940 KB)

    The increasing operational requirements for on-board autonomy in satellite control systems necessitates structural methods that support the design of a complete and reliable supervisory system. This paper presents the design strategy used to develop a supervisor for the attitude control system of the Danish Orsted satellite. The main topic is handling of faults arising in on-board instrumentation,... View full abstract»

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  • A generic approach to fault diagnosis in multi-channel clinical analysers

    Publication Year: 1997, Page(s):3/1 - 3/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    This paper presents an overview of the approach adopted in solving problems connected with fault diagnosis, preventive maintenance, and remote or telemaintenance in the context of a workstation complementing the operation of a multichannel clinical analyser. Such analysers are complex and are viewed as 'processes' with both discrete and continuous time data. The workforce are largely highly educat... View full abstract»

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  • Fault diagnosis in industrial process manufacturing using MSPC

    Publication Year: 1997, Page(s):4/1 - 4/3
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    The basis of multivariate statistical process control (MSPC) are the multivariate projection techniques of principal components analysis (PCA) and projection to latent structures. This paper focuses upon PCA. The philosophy behind these techniques is to reduce the dimensionality of the problem by forming a new set of latent variables. If the variables are highly correlated, then the process can be... View full abstract»

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  • Neural networks and multivariate SPC

    Publication Year: 1997, Page(s):5/1 - 5/5
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    Recent developments in the instrumentation of plants has led to multivariate statistical process control (MSPC) techniques becoming increasingly popular for process monitoring in the chemical industry over the last few years. This paper examines one such algorithm, the partial least squares (PLS), and shows how the basic principles of this linear technique can be extended into the nonlinear domain... View full abstract»

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