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IEEE Control Systems

Issue 4 • Aug. 1995

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Displaying Results 1 - 10 of 10
  • Engineers, psychologists, and administrators: control systems research in wartime, 1940-45

    Publication Year: 1995, Page(s):91 - 99
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1434 KB)

    Describes the organisation and work of 2 US wartime scientific agencies, the National Defense Research Committee (NDRC) and its successor and umbrella organization, the Office of Scientific Research and Development (OSRD).<> View full abstract»

    Freely Available from IEEE
  • Increased roles of linear algebra in control education

    Publication Year: 1995, Page(s):76 - 90
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1704 KB)

    In the past, control theory developed along different lines that required different mathematical tools. Time-varying systems required one set of tools, time-invariant another. Single-input, single-output problems lend themselves easily to one approach, but this approach is awkward for multivariable systems, etc. The purpose of this article is to point to the desirability of a unified approach to e... View full abstract»

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  • Control design and implementation in continuous steel casting

    Publication Year: 1995, Page(s):64 - 71
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (699 KB)

    Accurate control of the mold level in continuous casting is believed to be a key factor in improving the quality of the cast product. This paper describes an application of advanced control to this problem leading to a complete recommissioning of the mold level control system. Careful physical modeling identified smooth as well as nonsmooth nonlinearities in the process. Three different control st... View full abstract»

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  • Application of enhanced LQG/LTR for distillation control

    Publication Year: 1995, Page(s):56 - 63
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (722 KB)

    O'Dell and Misawa (1995) proposed a modification to the traditional LQG/LTR design procedure which provides uniform singular values across all frequencies for the target loop. The modification is easy to implement and significantly improves the performance of the LQG/LTR compensator. This article explores applicability of the technique for distillation column control, the most common multivariable... View full abstract»

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  • Robust PID control for an industrial distillation column

    Publication Year: 1995, Page(s):46 - 55
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (818 KB)

    State-space controllers are difficult to implement in a distributed control system. Therefore a control design based on the common PID control structures is desirable. This article presents the μ-optimal tuning of advanced PID control structures as well as a simple feedforward control design for an industrial binary high purity distillation column. The design is based on an optimization ap... View full abstract»

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  • Sensor, actuator, and loop validation

    Publication Year: 1995, Page(s):39 - 45
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    Economic pressures are dispersing machine intelligence away from centralized computers toward distributed Fieldbus devices. Simultaneously, the control concept is being extended to include other operational factors such as quality assurance, process data management, just-in-time maintenance, and plant safety and availability. As credible sensing and actuation are essential prerequisites for advanc... View full abstract»

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  • Modeling and control of variable-speed wind-turbine drive-system dynamics

    Publication Year: 1995, Page(s):28 - 38
    Cited by:  Papers (104)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1057 KB)

    When designing control for variable-speed wind turbines, one deals with highly resonant, nonlinear dynamic systems subject to random excitation, i.e., wind turbulence. This requires good knowledge of the dynamics to be controlled, particularly when combined with the increasingly common "soft" concept of lightweight, flexible constructional components; it creates cost advantages compared to more ma... View full abstract»

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  • Material mix control in cement plant automation

    Publication Year: 1995, Page(s):23 - 27
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (437 KB)

    The objective of this article is the development of a novel raw material mix proportion control algorithm for a cement plant raw mill, so as to maintain preset target mix proportion at the raw mill outlet. This algorithm utilizes one of the most basic and important tools of numerical linear algebra, the singular value decomposition (SVD), for calculation of raw mix proportion. The strength of this... View full abstract»

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  • Qualitative model-based fault detection in air-handling units

    Publication Year: 1995, Page(s):11 - 22
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1285 KB)

    The feasibility of a qualitative approach for detecting faults in an air-conditioning system is considered. The system considered is a multi-zone variable air volume air-handling unit, and the faults investigated include types which result in deterioration of operation, as distinct from actual failure. The operating modes of the sequential controller for the central air-handling plant can be match... View full abstract»

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  • Optimal indoor temperature control using a predictor

    Publication Year: 1995, Page(s):4 - 10
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (669 KB)

    This article deals with optimal control of the indoor temperature in a building. The control system attempts to find an economic optimum to supply heat to the building with the use of a predictor for the indoor temperature, while maintaining a comfortable temperature in the building. A general control structure is described that uses a linear objective function, which is minimized by linear progra... View full abstract»

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As the official means of communication for the IEEE Control Systems Society, the IEEE Control Systems Magazine publishes interesting, useful, and informative material on all aspects of control system technology for the benefit of control educators, practitioners, and researchers.

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Editor-in-Chief
Jonathan P. How
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