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Proceedings of International Conference on Control Applications

28-29 Sept. 1995

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Displaying Results 1 - 25 of 211
  • Proceedings of the 4th IEEE Conference on Control Applications

    Publication Year: 1995, Page(s):0_3 - x
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    Freely Available from IEEE
  • Name index

    Publication Year: 1995, Page(s):xi - xvi
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    Freely Available from IEEE
  • Applications of model based controls on 5 coal fired units to improve thermal and emissions performance

    Publication Year: 1995
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (142 KB)

    Summary form only given. Virginia Power embarked on an ambitious programme to install Stone and Webster's model based advanced steam temperature control (ASTC) system on Unit 1. The ASTC system included the model reference feedforward steam temperature control system to address the outage issue and the Soot Blow Advisor system to address the NO/sub x/ emission performance issue. This paper describ... View full abstract»

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  • Nonlinear feedback control of magnetic levitating system by exact linearization approach

    Publication Year: 1995, Page(s):267 - 268
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    This paper presents a robust control design for magnetic levitating systems (MLS) using the exact linearization approach. It consists of two steps: 1) it is shown that the MLS can be exactly linearized, so the problem caused by the model uncertainties in the usual approximate linearization can be overcome; 2) the robustness against the parameter uncertainties is guaranteed by linear robust control... View full abstract»

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  • Ship-mounted satellite tracking antenna with fuzzy logic control

    Publication Year: 1995, Page(s):549 - 553
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A robust satellite tracking antenna is designed to cope with the sensor imprecision and the highly noisy sea environment. Fuzzy logic is utilized for the controller design as well as inaccurate data interpretation. The fuzzy-rule based controller eliminates the need to model the nonlinear and noisy ship-mounted antenna system. With Global Positioning System and the tracking controller the antenna ... View full abstract»

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  • Control considerations relating to the use of superconducting coils for Maglev

    Publication Year: 1995, Page(s):261 - 266
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The control implications of using superconducting coils for electro-magnetic Maglev suspensions are examined. Three configurations are analysed, two of which have both superconducting and normal coils, and the third has only a superconducting coil. Current, voltage and flux changes are calculated both for the response to random and deterministic track inputs, and observations are made regarding th... View full abstract»

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  • Velocity regulation of stepper motors amidst constant disturbances

    Publication Year: 1995, Page(s):1041 - 1046
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    To regulate the velocity of hybrid stepper motor motion control systems, a control law which exploits the nonlinear dynamics to create an analog positional control in conjunction with a traditional linear control is introduced. This nonlinear approach allows coarse position sensors to be used, including position estimates based on back EMF measurements. Two specific compensators, i.e., velocity da... View full abstract»

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  • Modeling and system identification of active magnetic bearing systems

    Publication Year: 1995, Page(s):252 - 260
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1128 KB)

    Active magnetic bearing (AMB) systems have drawn much attention in the rotating machinery industry due to their advantages over conventional bearings such as fluid film and rolling element bearings. The AMB control system must provide robust performance over a wide range of machine operating conditions and over the machine lifetime in order to make this technology commercially viable. An accurate ... View full abstract»

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  • Synthesis of robust servo-controller using adaptive artificial potential field method

    Publication Year: 1995, Page(s):476 - 481
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper deals with the synthesis of robust servo-controller using the novel technique of adaptive artificial potential field method (AAPFM) where an artificial potential field is formulated with the properties that (1) there exists a global optimum curve (the minimum potential line) and (2) the feasible region (where the closed loop principal gains reside) is contained in a set of converging bo... View full abstract»

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  • Multiresolutional intelligent controller with unsupervised learning

    Publication Year: 1995, Page(s):543 - 548
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    This paper presents the NIST-RCS architecture of an intelligent controller enhanced with a learning algorithm. A multiresolutional world model evolves as a structure of knowledge representation which allows the creation and execution plans at each level of resolution View full abstract»

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  • Suboptimal control of linear singularly perturbed systems

    Publication Year: 1995, Page(s):1035 - 1040
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    This paper deals with the determination of optimal control strategies of linear singularly perturbed systems. This problem may be considerably simplified using some methods which give a suboptimal solution which is near around the optimal one. As an application, we consider the example of a doubly fed machine coupled to infinite bus View full abstract»

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  • Discrete control of TCSC for stability improvement in power systems

    Publication Year: 1995, Page(s):246 - 251
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Changes in the network such as connecting a shunt resistor, inserting a series capacitor, reduction of generation, load etc., when accomplished under a suitable control scheme can improve transient stability for FACTS. Switching of series capacitors in a transmission line can also help to damp oscillatory power transients. This paper presents a detailed analysis and study of a discrete control str... View full abstract»

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  • A MATLAB toolbox for fixed order, mixed-norm control synthesis

    Publication Year: 1995, Page(s):470 - 475
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    This paper introduces a MATLAB toolbox for fixed order, mixed-norm control synthesis. The Mixed-Norm Toolbox contains a complete set of routines for both continuous and discrete-time systems. The problem addressed by the toolbox is that of finding a compensator which minimizes the H2 norm of a transfer function, while constraining any combination of H∞ and/or l1 View full abstract»

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  • Intelligent control for swing up and balancing of an inverted pendulum system

    Publication Year: 1995, Page(s):534 - 542
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (996 KB)

    This paper describes implementation of swing-up and balancing control for a rotational inverted pendulum system. The authors' focus is on three aspects of fuzzy control in the overall control design: direct, supervisory, and auto-tuning fuzzy control. For a swing-up control, the authors utilize an energy pumping strategy, enhanced by introducing a fuzzy supervisory mechanism. For balancing control... View full abstract»

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  • An AI based frequency weighted least-squares filter

    Publication Year: 1995, Page(s):438 - 443
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    An artificial intelligence (AI) based robust algorithm to extract, a posteriori, the rational signal model from a noisy measurement, with little a priori information, is proposed. The spectrum and the statistics of the signal and of the corrupting noise are assumed unknown except that the signal is assumed to have a rational spectrum. An algorithm based on both system and signal theory, and on heu... View full abstract»

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  • Weighting function selection for H based power system stabilizer design

    Publication Year: 1995, Page(s):1033 - 1034
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Despite much progress in applying modern control technology to power system stabiliser (PSS) design with many different suggested PSS structures, many utilities still prefer a conventional PSS structure. The reasons may include ease of on-line tuning and lack of assurance on the stability related to some adaptive or variable structure schemes. Previously developed H∞ and related d... View full abstract»

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  • Performance analysis of a signal processing system for a digital control of an electrical drive

    Publication Year: 1995, Page(s):586 - 598
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The firing of a thyristor bridge feeding an electrical machine uses synchronization logical signals. The problem is to detect the instant of the input fundamental zero-crossing. The great precision required to perform the logical signals needs a good tracking performance. The lag in the authors' laboratory uses a band-pass digital filter the central frequency of which is enslaved to the input fund... View full abstract»

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  • Time-suboptimal control of a flexible structure

    Publication Year: 1995, Page(s):162 - 167
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    This paper presents several methods for designing closed-loop time-suboptimal controllers for a flexible structure. All the control strategies are applied to an experiment consisting of a hub with two flexible appendages and their performance to control this flexible structure is examined. The time-optimal bang-bang control based on the rigid body position and velocity is lowpass filtered to limit... View full abstract»

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  • Prony analysis and modeling of a TCSC under modulation control

    Publication Year: 1995, Page(s):239 - 245
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    This paper illustrates the use of Prony signal analysis tools to derive a system model of the thyristor controlled series capacitor (TCSC) located at the Bonneville Power Administration's (BPA's) Slatt 500 KV substation near Arlington Oregon. The Slatt TCSC is part of EPRI's flexible AC transmission systems (FACTS) initiative. The analysis presented in this paper was carried out to find linear mod... View full abstract»

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  • Combining neural and conventional paradigms for modeling, prediction, and control

    Publication Year: 1995, Page(s):566 - 571
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Promising research using neural networks for modeling, prediction, and control, exploits the complementarity of the two paradigms to address realistic problem situations. This paper develops a general framework for identifying the possible ways of combining neural networks with physical models, model-based estimators, and conventional controllers. The framework presented not only naturally leads t... View full abstract»

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  • Micro-precision interferometer pointing control system

    Publication Year: 1995, Page(s):464 - 469
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    The paper describes the development of the wavefront tilt (pointing) control system for the JPL micro-precision interferometer (MPI). This control system employs piezoelectric actuators and a digital imaging sensor with feedback compensation to reject errors in instrument pointing. Stringent performance goals require large feedback, however, several characteristics of the plant tend to restrict th... View full abstract»

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  • Robust tracking of uncertain robotic manipulators using high order nonlinear feedback

    Publication Year: 1995, Page(s):928 - 933
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    For rigid robots controlled by PD controllers, this paper is concerned with the robust tracking problem in the presence of lumped uncertainties and bounded torque disturbance. Assuming that the effect of uncertainties is upper bounded by a quadratic function of tracking error, we propose a nonlinear control scheme, which explicitly accounts for the absolute uncertainty bound, to improve the transi... View full abstract»

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  • Identification of aircraft and rotorcraft aeroelastic modes using state space system identification

    Publication Year: 1995, Page(s):432 - 437
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    Real time identification of various structural modes of the military fighter aircraft and rotorcaft is a serious problem. If these modes are not identified accurately, aeroservoelastic instabilities may occur. In this paper, we study the identification of these structural modes using both the simulated and real data with two powerful system identification techniques known as the stochastic realiza... View full abstract»

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  • A dissipativity framework for power system stabilizer design

    Publication Year: 1995, Page(s):1027 - 1032
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The purpose of this paper is to describe a dissipativity-based analytical framework for the study of low-frequency oscillations in power systems. This approach leads to a robust controller design formulation that can be solved using either an H∞ or a quantitative feedback theory (QFT) synthesis procedure. The two approaches are presented and a design example using the QFT approach... View full abstract»

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  • Analysis of stability robustness of a power system with loads represented by induction motors

    Publication Year: 1995, Page(s):818 - 824
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Recent advances in robust control theory allow for the analysis of stability robustness of power system controls over a wide range of operating conditions. The primary objective of this paper is to apply the robustness procedure to a power system where the loads are represented by induction motors. Uncertainty in the induction motor model is attributed to variations in system conditions as well as... View full abstract»

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