IEEE Transactions on Automatic Control

Issue 10 • Oct. 1993

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Displaying Results 1 - 25 of 29
  • Comments, with reply, on "Robust stability of an interval plant with respect to a convex region in the complex plane" by J. Shaw and J. Jayasuriya

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (123 KB)

    The commenter points out that the results of J. Shaw and J. Jayasuriya (ibid., vol.38, no.2, pp.284-287, Feb.1993) were published by F.J. Kraus and W. Truol (Int. J. Contr., vol.52, no.4, pp.967-983, 1991) for robust stability of polynomial families with affline linear parameter dependence. The authors agree with the commenter and point out that their own results derive from a paper they submitted... View full abstract»

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  • Comments on "Comments on "Stability analysis of a family of matrices" by J.H. Kim and Z. Bien

    Publication Year: 1993, Page(s):1607 - 1608
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (219 KB)

    A flaw is pointed out in the proof of a necessary and sufficient condition for robust stability of a polytope of matrices given by J.H. Kim and Z. Bien (ibid., vol.387, no.9, pp.1470-1472, Sep. 1992), in their comments on a paper by the present authors (ibid., vol.35, no.11, pp.1257-1259, Nov. 1190). Hence, the necessary condition as proposed may not be correct.<> View full abstract»

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  • A new characterization for multivariate Gaussian reciprocal processes

    Publication Year: 1993, Page(s):1601 - 1602
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (136 KB)

    Established a new necessary and sufficient condition for a multivariate Gaussian random process to be reciprocal. This result is then used to prove that the state vector of a two-point boundary value system is reciprocal. The authors do not impose any nonsingularity conditions on the covariance function of the state vector View full abstract»

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  • A new algorithm for constructing approximate transformations for nonlinear systems

    Publication Year: 1993, Page(s):1553 - 1556
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (360 KB)

    An algorithm is provided for constructing an approximating transformation for a feedback linearizable system, and for a system that is not feedback linearizable. Instead of approximating the given nonlinear system, the authors approximate the transformation in a proper sense. They assume that the lead variables of a transformation have a certain form with unknown parameters, substitute these varia... View full abstract»

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  • Adaptive asymptotic tracking of repetitive signals-a frequency domain approach

    Publication Year: 1993, Page(s):1572 - 1579
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (548 KB)

    The problem of designing an adaptive tracking controller for repetitive signals is considered. It is assumed that the controlled plant is linear time-invariant (LTI) and that its steady-state behavior can be described by its frequency response. The proposed controller, being able to identify the gain and phase of a plant at selected frequencies, adjusts the input/output (I/O) map at frequencies co... View full abstract»

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  • Reference model selection and adaptive control for induction motor drives

    Publication Year: 1993, Page(s):1594 - 1600
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (408 KB)

    An adaptive model-following speed controller for induction motor drives is proposed and implemented. This adaptive controller is easy to implement since, for the controlled plant, only the output signal is fed back. In order to choose a reference model with the desired drive dynamic behavior, a two-degree-of-freedom (2-DOF) controller is designed, using a systematic procedure based on the prescrib... View full abstract»

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  • Minimization of the maximum peak-to-peak gain: the general multiblock problem

    Publication Year: 1993, Page(s):1459 - 1482
    Cited by:  Papers (90)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2000 KB)

    A comprehensive study of the general l1-optimal multiblock problem and a new linear programming algorithm for computing suboptimal controllers are presented. By formulating the interpolation conditions in a concise and natural way, the general theory is developed in simpler terms and with a minimum number of assumptions. In addition, further insight is gained into the structure... View full abstract»

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  • On continuity/discontinuity in robustness indicators

    Publication Year: 1993, Page(s):1551 - 1553
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (296 KB)

    Continuity/discontinuity of robustness indicators is reviewed. For the case of real or mixed uncertainty, a regularization of a conservative bound to the robustness margin is proposed, and its properties are discussed. In the case of polynomial families with affine dependency on the uncertainty, a regularization of the robustness margin results View full abstract»

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  • Optimal periodic control implemented as a generalized sampled-data hold output feedback control

    Publication Year: 1993, Page(s):1560 - 1563
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (272 KB)

    A method for converting analog linear quadratic regulation control to a generalized sampled-data hold output-feedback control for a linear periodic system or a linear time-variant system is presented. It is shown that by using such a conversion, one can implement the optimal periodic control scheme in the presence of incomplete and delayed state measurements View full abstract»

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  • Robust stabilization of sampled-data systems to structured LTI perturbations

    Publication Year: 1993, Page(s):1497 - 1508
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (896 KB)

    Sampled-data systems with stable, structured, LTI (linear time-invariant) perturbations in the half-plane algebra applied to the continuous-time plant are considered. Necessary and sufficient conditions are derived for robust L2 stability of such systems. An example is provided to illustrate the results, which shows that the small gain theorem can be an extremely conservative r... View full abstract»

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  • Optimal service control of a station connected with two parallel substations

    Publication Year: 1993, Page(s):1567 - 1572
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (508 KB)

    The optimization problem is studied for a queueing network consisting of one station and two parallel subordinate stations. After service completion at the first station, the job is divided into two subjobs and each of them enters one of the subordinate stations. The service rate at the first station is controlled in order to minimize the expected total discounted cost or the long-run average expe... View full abstract»

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  • Dynamic feedback linearization of the induction motor

    Publication Year: 1993, Page(s):1588 - 1594
    Cited by:  Papers (104)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB)

    Dynamic state feedback is used to achieve feedback linearization of the induction motor. It is shown that the sixth-order nonlinear dynamical model of the induction motor consisting of rotor speed, two stator currents, two rotor fluxes and an integrator in the feedback controller can be made equivalent to two third-order decoupled linear systems by nonlinear state feedback through the stator input... View full abstract»

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  • On the computation of the Gram matrix in time domain and its application

    Publication Year: 1993, Page(s):1516 - 1520
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (396 KB)

    The Gram matrix of the system involves evaluation of the scalar product of repeated integrals and has formerly been computed in frequency domain. A time domain method for evaluation of the Gram matrix is presented. It is based on new properties of the Gram matrix, derived here. A model reduction algorithm based on these properties is presented. The method is illustrated by a numerical example View full abstract»

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  • Uniform approximation and the circle criterion

    Publication Year: 1993, Page(s):1450 - 1458
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (724 KB)

    The input-output maps G of causal time-invariant systems are considered, and a complete characterization of those maps that can be uniformly approximated by the maps of certain simple structures is given. The criterion is that G must satisfy certain continuity and approximately-finite-memory conditions. It is proved that the conditions are satisfied by the input-output maps of co... View full abstract»

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  • Exact and inexact LQG model matching problems

    Publication Year: 1993, Page(s):1545 - 1550
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (460 KB)

    The design of discrete-time LQG (linear-quadratic-Gaussian) controllers that yield closed-loop systems that match a provided model is addressed. The solution is in the form of a two-degree-of-freedom controller having feedback and feedforward paths that independently provide the optimal actions for disturbance rejection and model matching. Exact and approximate model matching cases are discussed i... View full abstract»

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  • Parameter estimation of systems subject to random state changes

    Publication Year: 1993, Page(s):1532 - 1536
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (380 KB)

    Parameter estimation for a linear regression model subject to abrupt random state changes is formulated as an optimization problem. An identification algorithm comprising state regime classification and parameter identification is developed. The samples of the system are first partitioned into different groups called clusters, corresponding to different states. The standard linear-least-square met... View full abstract»

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  • Transient behavior analysis of vibrationally controlled nonlinear parabolic systems with Neumann boundary conditions

    Publication Year: 1993, Page(s):1603 - 1607
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (376 KB)

    The transient behavior of vibrationally controlled distributed parameter systems governed by parabolic partial differential equations (PDEs) with Neumann boundary conditions is analyzed. The analysis uses a certain mapping and a time-invariant PDE whose trajectories under this mapping yield the approximate moving averages along the trajectories of the vibrationally controlled system. This approach... View full abstract»

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  • Regulator problem for linear continuous-time systems with nonsymmetrical constrained control

    Publication Year: 1993, Page(s):1556 - 1560
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (408 KB)

    The regulator problem is studied for linear continuous-time systems with nonsymmetrical constrained control. Necessary and sufficient conditions allowing the largest nonsymmetrical polyhedral positively invariant domain w.r.t. the system in the closed loop to be obtained are given. The case of symmetrical constrained control is obtained as a particular case View full abstract»

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  • Geometric structures of stable state feedback systems

    Publication Year: 1993, Page(s):1579 - 1583
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    A parameterization of the set of all stabilizing state-feedback gains is given, and the geometric structure of the set of stable state-feedback systems in the set of stable matrices is exploited. Some spectral properties related to this structure are derived. The results give not only fundamental guidelines for designing state-feedback gains using this parameterization but also a new approach to a... View full abstract»

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  • Stick slip and control in low-speed motion

    Publication Year: 1993, Page(s):1483 - 1496
    Cited by:  Papers (99)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1068 KB)

    Dimensional and perturbation analysis are applied to the problem of stick slip encountered during the motion of machines. The friction model studied is motivated by current tribological results and is appropriate for lubricated metal contacts. The friction model incorporates Coulomb, viscous, and Stribeck friction with frictional memory and rising static friction. Through dimensional analysis an e... View full abstract»

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  • On discrete spectral factorizations-a unified approach

    Publication Year: 1993, Page(s):1563 - 1567
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    State-space formulas for all key spectral factorizations appearing in the discrete-time H2/H∞ optimization are summarized. The factorization problems are categorized into three groups. Solutions are constructed by finding special coprime factors of a given transfer matrix using the associated discrete algebraic Riccati equation. Solution procedures for... View full abstract»

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  • On variable structure output feedback controllers for uncertain dynamic systems

    Publication Year: 1993, Page(s):1509 - 1512
    Cited by:  Papers (143)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (380 KB)

    A class of variable structure output feedback controllers for uncertain dynamic systems with bounded uncertainties is proposed. No statistical information about the uncertain elements is assumed. A variable structure systems approach and a geometric approach to the analysis and synthesis of system zeros are employed in the synthesis of the proposed controllers View full abstract»

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  • Linearization of attitude-control error dynamics

    Publication Year: 1993, Page(s):1521 - 1525
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    Some useful properties of direction-cosine and quaternion attitude formulations that include specification of attitude error and the inversion of rigid-body rotational dynamics are reviewed. The inversion procedure is then applied to a measure of attitude error to realize a new model-follower control system that exhibits linear attitude-error dynamics. Error analyses and simulation results for spa... View full abstract»

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  • A new tabular form for determining root distribution of a complex polynomial with respect to the imaginary axis

    Publication Year: 1993, Page(s):1536 - 1541
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (416 KB)

    The original Routh table dealing with real polynomials is further investigated for complex polynomials. A tabular form for determining root distribution of a complex polynomial with respect to the imaginary axis is developed, and modified procedures for directly treating singularities in the array are proposed. Also, procedures are developed for determining the respective orders of simple and/or r... View full abstract»

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  • Nonlinear speed observer for the PM stepper motor

    Publication Year: 1993, Page(s):1584 - 1588
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    A nonlinear observer for the permanent magnet (PM) stepper motor is considered. Specifically, the method of A.J. Krener and W. Respondek (1985) is used to construct a nontrivial full-order speed observer that has linear error dynamics. The procedure is validated by experimental results. Reduced-order observers are constructed by inspection View full abstract»

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In the IEEE Transactions on Automatic Control, the IEEE Control Systems Society publishes high-quality papers on the theory, design, and applications of control engineering.  Two types of contributions are regularly considered

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Meet Our Editors

Editor-in-Chief
P. J. Antsaklis
Dept. Electrical Engineering
University of Notre Dame