IEEE Control Systems

Issue 1 • Jan. 1991

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Displaying Results 1 - 20 of 20
  • Admissibility in blind adaptive channel equalization

    Publication Year: 1991, Page(s):3 - 15
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1190 KB)

    A tutorial survey is presented of an open problem, namely, the admissibility of the memory-less-error-function class of blind adaptive channel equalizers. The problem is treated in a manner that stresses control engineering, rather than communications engineering, terminology. A simple, simulated experiment is set up and referred to throughout. It is used to illustrate intersymbol interference and... View full abstract»

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  • Survey of estimation techniques in image restoration

    Publication Year: 1991, Page(s):16 - 24
    Cited by:  Papers (25)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (963 KB)

    Blurred and noisy images can often be represented as nonstationary 2D stochastic processes that can be modeled by a set of linear space-varying state equations, or by an ARMA input-output equation with space-varying coefficients. Liner difference equation models for characterizing both images and their degraded observations are reviewed. The models are then expressed in state-space form suitable f... View full abstract»

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  • Issues in system identification

    Publication Year: 1991, Page(s):25 - 29
    Cited by:  Papers (59)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (436 KB)

    A brief outline is given of mainstream system identifications, i.e. the typical approaches, algorithms, and properties in the world of data-based model construction. A number of important problems that are not sufficiently understood are pointed out. Particular attention is given to the problem of how to develop constructive and systematic ways to determine suitable model structures, i.e. to move ... View full abstract»

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  • Issues in signal processing

    Publication Year: 1991, Page(s):29 - 32
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (349 KB)

    Some of the relationships between signal processing and control are highlighted. The nature of the connection between the two is briefly examined. The following topics are then discussed: stability; parameter identification, state estimation and signal modeling; synthesis, realization and implementation of algorithms; multidimensional systems; and nonlinear systems.<> View full abstract»

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  • Learning and decision making for intelligent control systems

    Publication Year: 1991, Page(s):34 - 37
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (304 KB)

    The features of intelligent control systems are briefly described, and early research on machine intelligence is summarized. The development of learning schemes for intelligent control systems is examined, focusing on three current studies in which the author has been involved.<> View full abstract»

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  • Where is the intelligence in intelligent control?

    Publication Year: 1991, Page(s):37 - 39
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (278 KB)

    The development of control systems with significantly increased capability by combining methodologies from feedback control and artificial intelligence is addressed. The discussion covers control system design, online systems, adaptation and learning, simple process controllers, and hardware components based on recent developments in neural networks.<> View full abstract»

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  • Intelligent control

    Publication Year: 1991, Page(s):39 - 40
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (178 KB)

    The current status of control theory is examined briefly. A few examples are given to emphasize that the intelligent control of the present will be the conventional control of the future. The roles of prior information and neural networks in intelligent control are discussed.<> View full abstract»

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  • An overview of neural networks for control

    Publication Year: 1991, Page(s):40 - 41
    Cited by:  Papers (36)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (201 KB)

    The potential of neural network controllers is considered in general terms. Some specific methods are then examined. They are supervised control, direct inverse control, neural adaptive control, backpropagation of utility, and adaptive critic methods.<> View full abstract»

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  • An intelligent control system for rocket engines: need, vision, and issues

    Publication Year: 1991, Page(s):42 - 46
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (425 KB)

    Several components of intelligence are defined. Within the context of these definitions an intelligent control system for rocket engines is described. The description includes a framework for development of an intelligent control system, including diagnostics, coordination, and direct control. Some current results and issues are presented.<> View full abstract»

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  • Quality and innovation

    Publication Year: 1991, Page(s):47 - 51
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (441 KB)

    The stories of three leaders in the Japanese electronics industry are related to give some insight into the differences and similarities between management in the US and Japan. The leaders discussed are Konosuke Matsushita, Kanjiro Okada, and Koruji Kobayashi. Quality, excessive division of labor, graceful growth, and effective manpower for a breakthrough are then discussed, showing that quality, ... View full abstract»

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  • Active force reflection devices in teleoperation

    Publication Year: 1991, Page(s):52 - 56
    Cited by:  Papers (18)  |  Patents (26)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (398 KB)

    A methodology for designing force-reflecting active controllers in cases involving teleoperation is presented. Certain types of force loop configurations nested within a position loop are shown to provide more information about the environment to the human, and that improves interaction. The procedure of modulating the controller to match the integral of its inverse mechanical impedance to the pla... View full abstract»

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  • Model reference adaptive control of a gantry crane scale model

    Publication Year: 1991, Page(s):57 - 62
    Cited by:  Papers (57)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (515 KB)

    A method of reference model decomposition, an extension of model reference adaptive control, is presented. The decomposition method can be regarded as a way of including knowledge about the structure and parameters of unmodeled dynamics in the adaptive system, making it possible to choose a lower order controller which is only equipped for the nominal process part. To illustrate the decomposition ... View full abstract»

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  • A predictive controller for the Mach number in a transonic wind tunnel

    Publication Year: 1991, Page(s):63 - 72
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (788 KB)

    The use of the unified predictive controller in controlling the Mach number of a transonic wind tunnel is examined. It is shown, by means of simulations and experiments, that the unified predictive controller yields an overall performance improvement of 30-60% in comparison with the proportional-integral-derivative (PID) controller that is normally used to control the Mach number. The rejection by... View full abstract»

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  • Accommodation of failures in the F-16 aircraft using adaptive control

    Publication Year: 1991, Page(s):73 - 78
    Cited by:  Papers (107)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (465 KB)

    Surface and hardware failure affect the flight control system of the F-16 fighter aircraft. In the absence of failures and unpredictable changes, the controller, based on gain scheduling, performs very well and exhibits a good degree of robustness, even for high angles of attack. In order to accommodate for possible failure and maintain good performance characteristics, the control system is augme... View full abstract»

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  • Analytical framework for gain scheduling

    Publication Year: 1991, Page(s):79 - 84
    Cited by:  Papers (313)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (544 KB)

    The gain scheduling approach to the control of nonlinear systems is explained, and its characteristics are examined. On the basis of this framework questions are raised, and implications are drawn for practical design situations. The relationship between the gain scheduling formulation and the extended-linearization approach for nonlinear control design is considered.<> View full abstract»

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  • Reconfigurable control of power plants using learning automata

    Publication Year: 1991, Page(s):85 - 922
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (603 KB)

    A deaerating feedwater heater, equipped with a water level controller and a pressure controller, is used to investigate the feasibility of a reconfigurable control scheme for power plants by incorporating the concept of learning automata. The approach uses stochastic automata to learn the current operating status of the plant by dynamically monitoring the system performance and then switching to t... View full abstract»

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  • Loop gain-phase shaping for single-input-single-output robust controllers

    Publication Year: 1991, Page(s):93 - 101
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (673 KB)

    The steps in loop gain-phase shaping design, an approach that offers significant advantages in the design of robust single-input-single-output control systems, are summarized. A family of CAD tools that implement the design procedure is described. several examples are presented showing the use of these tools and demonstrating some of the performance advantages available with loop gain-phase shapin... View full abstract»

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  • A workbench for digital control systems

    Publication Year: 1991, Page(s):102 - 106
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (469 KB)

    A toolbox for developing applications for debugging, tuning, and field-testing digital control systems is described. It is primarily intended for the programmer responsible for the coding of the control software, and it provides a diagnostic environment in which this custom software will run. The operator workbench, i.e. the facility the control specialist uses actually to set up and test a system... View full abstract»

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  • Knowledge element identified for metal rolling control engineers

    Publication Year: 1991, Page(s):108 - 110
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (204 KB)

    The Control Systems Society has identified critical knowledge elements used by successful control systems professionals working in the rolled products segment of the metals industry. These elements have been documented in a Field Specific Knowledge Inventory (FSKI) as part of the IEEE Engineering Skills Assessment Program. The FSKI for process control in metal rolling is described.<> View full abstract»

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  • Comments, with reply, on 'Opportunities in organizational control' by R.F. Drenick (and reply)

    Publication Year: 1991
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (86 KB)

    The commenter observes that the author of the original paper (ibid., vol.10, no.5, p.27-9, 1990) overlooked the system dynamics approach to organizational control. The commenter discusses the importance of the method and provides some general references. The author responds that he found the ideas embodied in the system dynamics approach unconvincing, and he disputes the commenter's contention tha... 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
jhow@mit.edu