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IEEE Transactions on Automatic Control

Issue 7 • July 1987

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1987, Page(s): 0
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1987, Page(s): 561
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    Freely Available from IEEE
  • Editorial: On controllable and observable theory

    Publication Year: 1987, Page(s): 562
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    Freely Available from IEEE
  • Global null controllability of perturbed linear periodic systems

    Publication Year: 1987, Page(s):623 - 625
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB)

    In this note we study the global null controllability with bounded controls of perturbed linear periodic systems in Rn. More explicitly, a globally null controllable periodic system is perturbed by suitably small termsV(t)andC(t)to obtain a system of the formdot{x} = (A(t) + V(t))x + (B(t) + C(t))uand sufficient conditions are given to ensure the global ... View full abstract»

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  • Control of decentralized systems with distributed controller complexity

    Publication Year: 1987, Page(s):625 - 629
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    An approach is presented which allows design of stabilizing decentralized controllers for linear systems with two scalar channels, such that each local controller is endowed with some dynamics while the sum of the orders is kept smaller than the system order. It is shown that for almost allnth-order systems with two scalar channels the local controllers can be chosen such that their ord... View full abstract»

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  • A geometric approach to eigenstructure assignment for singular systems

    Publication Year: 1987, Page(s):629 - 632
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (481 KB)

    Moore's well-known result on the feedback assignment of eigenstructure in linear state-space systems [5] was generalized to descriptor systems in [9]. In this note we make some useful extensions to fill out the theory. To begin with, we do not assume controllability of the plant. It is shown that the maximum number of finite closed-loop eigenvalues is equal to dim (EL*), where L* View full abstract»

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  • Matrix continued fractions are directly related to the maximal (A, B)-invariant subspace in KerC

    Publication Year: 1987, Page(s):632 - 635
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (471 KB)

    The maximal(A, B)-invariant subspace in KerCis characterized in terms of polynomial models, by its properties pertaining to the Hankel map. This characterization is directly related to the first stage in a continued fraction representation of the transfer function. The atoms of the continued fraction are given explicitly in terms of Tocplitz operators. We also obtain a comple... View full abstract»

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  • Optimal output feedback for nonzero set point regulation

    Publication Year: 1987, Page(s):641 - 645
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Motivated by the results of Artstein and Leizarowitz [2] on steady-state periodic tracking, a continuous-time nonzero set point regulation problem is considered which involves 1) noisy and nonnoisy measurements, 2) weighted and unweighted controls, 3) Correlated plant/ measurement noise and cross weighting, 4) nonzero-mean disturbances, and 5) state-, control-, and measurement-dependent white nois... View full abstract»

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  • The operational matrices of integration and differentiation for the Fourier sine-cosine and exponential series

    Publication Year: 1987, Page(s):648 - 651
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    For the Fourier sine-cosine series basis vectorvarphi(t)and the Fourier exponential series basis vectorpsi(t), a linear nonsingular transfor-marionTis determined such thatpsi(t) = Tvarphi(t). This result is then used to show that the operational matrices of integrationPandQforvarphi(t)andpsi(t), respectively, a... View full abstract»

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  • [Back cover]

    Publication Year: 1987, Page(s): 0
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    Freely Available from IEEE
  • Detection filter design: Spectral theory and algorithms

    Publication Year: 1987, Page(s):593 - 603
    Cited by:  Papers (232)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1352 KB)

    A new formulation of the detection filter problem is generated by assignment of the closed-loop eigenstructure under certain constraints. Detection filters, which are actually a specific class of observers, fix the output error direction of the system so that it can be associated with a particular failure mode and its known design failure direction. The derivation of detection filters from an eige... View full abstract»

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  • Analysis of digital controllers using frequency-dependent describing functions

    Publication Year: 1987, Page(s):651 - 653
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Once a digital control system has been coded and implemented on a computer, simulation must usually be relied on for testing the controller. Proving that a controller is stable requires exhaustive testing. This note discusses the computation and application of frequency-dependent describing functions to nonlinear digital controllers once the controller has been implemented on a computer. View full abstract»

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  • LQG homing in two dimensions

    Publication Year: 1987, Page(s):639 - 641
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    In this note we consider the problem of the optimal control of a set of two independent Gaussian white noises, first in the upper half-plane and then in the first quadrant. In both cases the objective is to leave the continuation region, either as soon as possible or through the origin, depending on the form of the cost function. View full abstract»

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  • Flexible system model reduction and control system design based upon actuator and sensor influence functions

    Publication Year: 1987, Page(s):573 - 582
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    A model reduction technique based on aggregation with respect to sensor and actuator influence functions rather than modes is presented for large systems of coupled second-order differential equations. Perturbation expressions which can predict the effects of spillover on both the reduced-order plant model and the neglected plant model are derived. For the special case of collocated actuators and ... View full abstract»

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  • Estimation using a multirate filter

    Publication Year: 1987, Page(s):653 - 656
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This note presents both optimal and suboptimal filtering algorithms for estimating state variables based on measurements sampled at two different data rates. The optimal algorithm consists of two parallel Kalman filters; one processes the fast rate measurement and is of reduced-order, and the other processes the residuals from the first filter along with the slow rate measurement. This algorithm i... View full abstract»

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  • Analysis of time-varying scaled systems via general orthogonal polynomials

    Publication Year: 1987, Page(s):645 - 648
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    General orthogonal polynomials are introduced to analyze and approximate the solution of a class of scaled systems. Using the operational matrix of integration, together with the operational matrix of linear transformation, the dynamical equation of a scaled system is reduced to a set of simultaneous linear algebraic equations. The coefficient vectors of the general orthogonal polynomials can be d... View full abstract»

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  • On system equivalence

    Publication Year: 1987, Page(s):619 - 621
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    This note establishes the relationship between strong system equivalence [3] and complete system equivalence [6] and deduces two sets of compact conditions for strong system equivalence of polynomial realizations. View full abstract»

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  • Performance evaluation and perturbation analysis of discrete event dynamic systems

    Publication Year: 1987, Page(s):563 - 572
    Cited by:  Papers (109)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1312 KB)

    This is a conceptual and speculative paper concerning the future development of system and control theory in operational and discrete event systems with particular emphasis to the techniques of perturbation analysis. View full abstract»

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  • The asymptotic local approach to change detection and model validation

    Publication Year: 1987, Page(s):583 - 592
    Cited by:  Papers (99)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    We present a systematic approach for the design of change detection and model validation algorithms for dynamical systems. We show how to associate to any identification algorithm a change detection and a model validation procedure, which are optimal in some asymptotic sense. The foundations of our method go back to the asymptotic local approach in statistics, and our method generalizes this appro... View full abstract»

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  • Stability robustness bounds for linear state-space models with structured uncertainty

    Publication Year: 1987, Page(s):621 - 623
    Cited by:  Papers (239)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    In this note, we consider the robust stability analysis problem in linear state-space models. We consider systems with structured uncertainty. Some lower bounds on allowable perturbations which maintain the stability of a nominally stable system are derived. These bounds are shown to be less conservative than the existing ones. View full abstract»

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  • Asymptotic agreement and convergence of asynchronous stochastic algorithms

    Publication Year: 1987, Page(s):612 - 618
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    In this paper, we present results on the convergence and asymptotic agreement of a class of asynchronous stochastic distributed algorithms which are in general time-varying, memory-dependent, and not necessarily associated with the optimization of a common cost functional. We show that convergence and agreement can be reached by distributed learning and computation under a number of conditions, in... View full abstract»

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  • Vibrational feedback control: Zeros placement capabilities

    Publication Year: 1987, Page(s):604 - 611
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    It is shown that in addition to closed-loop pole placement, vibrational feedback controllers lead, in the sense specified below, to a possibility of open-loop zeros assignability. On this basis, the superior performance characteristics of continuous-time periodic controllers, discovered in [3]-[6], are explained. View full abstract»

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  • Straight line reachability of Roesser model

    Publication Year: 1987, Page(s):637 - 639
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A new definition of straight line reachability for the Roesser model is presented. Necessary and sufficient conditions for straight line teachability of the Roesser model are established. A relationship between local reachability and straight line reachability of the Roesser model is discussed. View full abstract»

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  • S-plane to Z-plane mapping using a simultaneous equation algorithm based on the bilinear transformation

    Publication Year: 1987, Page(s):635 - 637
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    This note presents an algorithm for transforming a continuous transfer function to an approximate discrete equivalent by means of the bilinear transformation. 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