IEEE Transactions on Automatic Control

Issue 11 • Nov. 1990

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Displaying Results 1 - 19 of 19
  • Comments on "A chi-square test for fault detection in Kalman filters" [with reply]

    Publication Year: 1990, Page(s):1277 - 1278
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (232 KB)

    A few errors of omission in the failure-detection application of the above-titled paper by Brumback and Srinath (ibid., vol.AC-32, p.552-4, June 1987) are corrected by the commenter. The commenter points out that what the authors claim is an original alternate (chi-square) test for the failure detection as a possible noniterative replacement for the iterative two ellipsoid overlap test has already... View full abstract»

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  • Comments on "Polytopes of polynomials with zeros in a prescribed set

    Publication Year: 1990, Page(s):1276 - 1277
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (205 KB)

    In a recent paper by M. Fu and B.R. Barmish (ibid., vol.34, p.544-6, May 1989), the applicability of the edge theorem was significantly extended, mainly through relaxing a simple-connectedness assumption. The class of subsets of the complex plane to which the main result applies is referred to as those subsets whose complements are pathwise connected on the Riemann sphere. The authors give a defin... View full abstract»

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  • Controlled ALOHA with geometric capture probabilities

    Publication Year: 1990, Page(s):1270 - 1274
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    An infinite user, slotted ALOHA system operating over a capture channel is studied. In a capture channel, differences in the levels of received power and the times of arrival allow the receiver to successfully receive a packet even when two or more have been transmitted simultaneously. The slotted ALOHA system operating over a capture channel is known to be unstable unless a control policy is used... View full abstract»

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  • A mechanical analog in nonlinear nuclear reactor stability analysis

    Publication Year: 1990, Page(s):1235 - 1238
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (276 KB)

    A sufficient condition for the asymptotic stability of nuclear reactors in terms of the equilibrium power level and arbitrary feedback parameters is obtained through the use of a mechanical analog. The stability criterion (related to the amplitude of oscillations of the autonomous system and shown to contain no delayed neutron contribution) differs in this respect from previous work and provides f... View full abstract»

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  • Strictly positive real transfer functions revisited

    Publication Year: 1990, Page(s):1243 - 1245
    Cited by:  Papers (64)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (212 KB)

    The two most commonly used definitions of strictly positive real (SPR) transfer functions are reviewed. Contrary to what has been suggested in the literature, it is proven that the least restrictive (weak) definition of the two is clearly related to the Yacubovich-Kalman lemma. The relationship between time- and frequency-domain conditions pertaining to the weak definition of SPR systems is establ... View full abstract»

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  • Alternating renewal process models for electric power system loads

    Publication Year: 1990, Page(s):1245 - 1249
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (364 KB)

    Results are derived for a class of stochastic processes called alternating renewal processes that appear particularly suitable for modeling air-conditioning loads on electrical power systems. Expressions for the Laplace transforms of the nonstationary mean and the stationary autocorrelation function are obtained. If the on-duration and off-duration random variables have gamma distributions of the ... View full abstract»

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  • Controller parametrization for time-varying multirate plants

    Publication Year: 1990, Page(s):1259 - 1262
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (372 KB)

    The authors obtain a parametrization of all stabilizing controllers for a given discrete-time time-varying linear finite-dimensional multirate system. The parametrization is a natural extension of the Youla parametrization of all stabilizing controllers to the setting of multirate systems. The set of all stabilizing controllers is shown to be the set of all closed-loop systems obtained by terminat... View full abstract»

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  • Feedback control for linear time-invariant systems with state and control bounds in the presence of disturbances

    Publication Year: 1990, Page(s):1231 - 1234
    Cited by:  Papers (114)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    The problem of the stabilizing linear control synthesis in the presence of state and input bounds for systems with additive unknown disturbances is considered. The only information required about the disturbances is a finite convex polyhedral bound. Discrete- and continuous-time systems are considered. The property of positive D -invariance of a region is introduced, and it is proved that... View full abstract»

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  • Stabilization of tethered satellites during station keeping

    Publication Year: 1990, Page(s):1186 - 1196
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (604 KB)

    After deriving a set of dynamic equations governing the dynamics of a tethered satellite system (TSS), stabilizing tension-control laws are derived in feedback form. The tether is assumed to be rigid and massless, and the equations of motion are derived using the system Lagrangian. It is observed that, to stabilize the system, tools from stability analysis of critical nonlinear systems must be app... View full abstract»

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  • Variable structure model-reference adaptive control (VS-MRAC) using only input and output measurements: the general case

    Publication Year: 1990, Page(s):1238 - 1243
    Cited by:  Papers (92)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (556 KB)

    A globally asymptotically stable VS-MRAC for the general case of plants with arbitrary relative degree is presented. It is shown that the VS approach leads to general adaptive controllers with outstanding performance. The controllers use only I/O measurements and are free of differentiators. The results indicate that several of the usual drawbacks of conventional MRACs (e.g. unsatisfactory transie... View full abstract»

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  • On zero locations for sampled stochastic systems

    Publication Year: 1990, Page(s):1249 - 1253
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    Zero locations of stochastic models have significant influence on optimal prediction algorithms as well as on the convergence speed of identification method. The possible zero locations for a sampled stochastic system are examined. In particular, it is shown and numerically illustrated that the sampled zeros can appear only in a restricted set within the unit circle. A complete analysis of second-... View full abstract»

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  • Block decoupling of linear ω-periodic discrete-time systems

    Publication Year: 1990, Page(s):1262 - 1265
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (300 KB)

    The paper considers block decoupling control of a linear ω-periodic discrete-time system with state feedback. The notion of the maximal reachability subspace and the method to calculate it are extended to the periodic case. Under the assumption that the input transformation is nonsingular, a necessary and sufficient solvability condition for block decoupling is represented in terms of the ma... View full abstract»

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  • Quadratic optimization of motion coordination and control

    Publication Year: 1990, Page(s):1197 - 1208
    Cited by:  Papers (92)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (836 KB)

    Algorithms for continuous-time quadratic optimization of motion control are presented. Explicit solutions to the Hamilton-Jacobi equation for optimal control of rigid-body motion are found by solving an algebraic matrix equation. The system stability is investigated according to Lyapunov function theory and it is shown that global asymptotic stability holds. How optimal control and adaptive contro... View full abstract»

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  • Adaptive linear control of nonlinear systems

    Publication Year: 1990, Page(s):1253 - 1257
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    The theory of stable parameter adaptive control has advanced to allow linear time-varying plants. However, a more honest view of such systems is that they are often derived from inexact linearization about a trajectory of a nonlinear system. Standard adaptive control based on a linear model can then be interpreted as one way to realize a nonlinear controller for a nonlinear plant. The implications... View full abstract»

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  • On the stability bounds of singularly perturbed systems

    Publication Year: 1990, Page(s):1265 - 1270
    Cited by:  Papers (75)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (508 KB)

    The stability bound problem of linear time-invariant singularly perturbed systems is considered. A set of new stability conditions based on the frequency-domain representation is derived. The stability criteria can be easily verified by computing certain singular values within finite frequency intervals. Illustrative examples show that the proposed criteria actually induce a less conservative ^... View full abstract»

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  • Sensitivity of the stable discrete-time Lyapunov equation

    Publication Year: 1990, Page(s):1209 - 1217
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (720 KB)

    The sensitivity of the stable discrete-time Lyapunov equation is analyzed through the spectral norm of the inverse Lyapunov operator. This leads to a directly computable easy-to-interpret sensitivity measure, which involves only the open-loop state matrix and also provides insight into the connection between sensitivity, stability radius, and conditioning of the eigenproblem of the open-loop state... View full abstract»

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  • Stability analysis of a family of matrices

    Publication Year: 1990, Page(s):1257 - 1259
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (244 KB)

    The authors extend the use of the Lyapunov equation method to check the stability of a family of matrices. The family of interval matrices is defined as the convex hull of a finite number of matrices and is a special case where each element has independent perturbation. While the stability of interval matrices cannot be inferred from the stability of its vertex matrices, the authors show that the ... View full abstract»

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  • Number theoretic fast algorithms for bilinear and other generalized transformations

    Publication Year: 1990, Page(s):1275 - 1276
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (192 KB)

    Fast algorithms based on the Mersenne and Fermat number-theoretic transforms are used to perform the bilinear transformation of a continuous transfer function to a discrete equivalent. The computations are carried out in finite precision arithmetic, require no multiplications, and can be implemented in parallel using very simple processors. Although the bilinear transform is presently emphasized, ... View full abstract»

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  • Smoothed perturbation analysis for a class of discrete-event systems

    Publication Year: 1990, Page(s):1218 - 1230
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1048 KB)

    A gradient-estimation procedure for a general class of stochastic discrete-event systems is developed. In contrast to most previous work, the authors focus on performance measures whose realizations are inherently discontinuous (in fact, piecewise constant) functions of the parameter of differentiation. Two broad classes of finite-horizon discontinuous performance measures arising naturally in app... View full abstract»

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Aims & Scope

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