IEEE Transactions on Automatic Control

Volume 24 Issue 6 • December 1979

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Displaying Results 1 - 25 of 37
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): 0
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  • In memoriam: Giorgio Quazza

    Publication Year: 1979, Page(s): 833
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  • Invertibility of multivariable nonlinear control systems

    Publication Year: 1979, Page(s):855 - 865
    Cited by:  Papers (250)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (719 KB)

    This paper gives sufficient conditions for the invertibility of nonlinear control systems of the formdot{x}= A(x)+ u_{1}B_{1}(x) +... + u_{m} B_{m}(x);y=c(x), where the state space is a real analytic manifold. These conditions are also necessary in the case of single-input nonlinear systems and multivariable time-invariant linear systems. For invertible systems we construct nonlinear in... View full abstract»

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  • A Hessenberg-Schur method for the problem AX + XB= C

    Publication Year: 1979, Page(s):909 - 913
    Cited by:  Papers (423)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (481 KB)

    One of the most effective methods for solving the matrix equationAX+XB=Cis the Bartels-Stewart algorithm. Key to this technique is the orthogonal reduction ofAandBto triangular form using theQRalgorithm for eigenvalues. A new method is proposed which differs from the Bartels-Stewart algorithm in thatAis only reduced to Hessenberg form. The res... View full abstract»

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  • Robust solution of perturbed dynamical equations from within a convex restraint set

    Publication Year: 1979, Page(s):921 - 926
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (586 KB)

    In [1] and [2], the notion of "robust solution" was defined for a system of perturbed linear dynamical equations. Heuristically speaking, a robust solution (input)x(cdot)is one for which the dependent variable (output) can be guaranteed to lie in a certain interval-independently of nature's choice of perturbation within given bounds. In this paper, we go beyond the results of [1] and [2... View full abstract»

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  • Maximum-likelihood estimation of a process with random transitions (failures)

    Publication Year: 1979, Page(s):932 - 937
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    A process with random transitions is represented by the difference equationx_{n} = x_{n-1}+ u_{n}where unis a nonlinear function of a Gaussian sequence w_{n}. The nonlinear function has a threshold such thatu_{n} =0for|w_{n}| leq W. This results in a finite probability of no failure at every step. Maximum likelihood estimation of the sequenceX_{n}={... View full abstract»

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  • Linear recursive state estimators under uncertain observations

    Publication Year: 1979, Page(s):944 - 948
    Cited by:  Papers (127)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (483 KB)

    For linear systems with uncertain observations, we investigate the existence of recursive least-squares state estimators. The uncertainty in the observations is caused by a binary switching sequence γk, which is specified by a conditional probability distribution and which enters the observation equation asz_{k} = gamma_{k} H_{k} x_{k}+upsilon_{k}. Conditions are establi... View full abstract»

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  • Adaptive control of Markov chains, I: Finite parameter set

    Publication Year: 1979, Page(s):953 - 957
    Cited by:  Papers (69)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (470 KB)

    Consider a controlled Markov chain whose transition probabilities depend upon an unknown parameter α taking values in finite setA. To each α is associated a prespecified stationary control lawphi(alpha). The adaptive control law selects at each timetthe control action indicated byphi(alpha_{t})where αtis the maximum likelihood e... View full abstract»

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  • The set of all minimal partial realizations

    Publication Year: 1979, Page(s):966 - 970
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    This paper is concerned with the uniqueness of minimal partial realizations. Earlier papers are typically concerned with the problem of the existence and the determination of a matrix triple(tilde{A},tilde{B},tilde{C})which is a minimal partial realization of a sequence{Y_{1},...,Y_{m}}of Markov parameters. In this paper a parameterized realization(A(y),B, C)(... View full abstract»

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  • Factorization methods for discrete sequential estimation [Book reviews]

    Publication Year: 1979, Page(s):990 - 992
    Cited by:  Papers (1)
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  • Dynamical systems and their applications: Linear theory [Book reviews]

    Publication Year: 1979, Page(s):992 - 993
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  • Managerial planning: An optimum and stochastic control approach [Book reviews]

    Publication Year: 1979, Page(s): 993
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  • [Back cover]

    Publication Year: 1979, Page(s): 0
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  • A stochastic realization approach to the smoothing problem

    Publication Year: 1979, Page(s):878 - 888
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    The purpose of this paper is to develop a theory of smoothing for finite dimensional linear stochastic systems in the context of stochastic realization theory. The basic idea is to embed the given stochastic system in a class of similar systems all having the same output process and the same Kalman-Bucy filter. This class has a lattice structure with a smallest and a largest element; these two ele... View full abstract»

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  • Multiobjective trajectory optimization for electric trains

    Publication Year: 1979, Page(s):888 - 893
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    This paper develops a method for generating Pareto efficient trajectories that provide optimal tradeoffs between two conflicting attributes-the total energy consumed and the total time taken to complete each trajectory. Straightforward formulations of the multiobjective optimization problem in these attributes are difficult to solve because of certain nonlinearities in train models and certain con... View full abstract»

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  • A filter for separating time-limited modal signals

    Publication Year: 1979, Page(s):926 - 932
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A two-stage deterministic filter is derived which can separate two sets of modal signals when presented with their arbitrary mixed sum on a fixed finite time interval. The assumptions are 1) that the mode locations in the complex plane are known for one set (for example, a finite Fourier series has known modes relative to a given time interval) and 2) the two sets of modes are disjoint. Using inte... View full abstract»

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  • On the efficient and reliable numerical solution of large linear systems of ODE's

    Publication Year: 1979, Page(s):905 - 908
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Using a combination of numerical techniques from linear algebra and from ordinary differential equations, a package of efficient procedures are described for the efficient numerical solution of large linear systems of ODE's. The techniques avoid the explicit approximation of the matrix exponential and exploit any structure that is inherent in the system. Numerical results are presented which illus... View full abstract»

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  • On the irreducibility condition in the structural controllability theorem

    Publication Year: 1979, Page(s):963 - 966
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    It is known that the structural system (A,B) is structurally controllable if and only if the corresponding matrix [A B] is generically full rank and irreducible. In this paper it is shown that the irreducibility condition alone implies that every nonzero mode of (A,B) is generically controllable. This result provides an easy proof to the structural controllability theorem stated above. In addition... View full abstract»

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  • New results in realization theory for linear time-varying analytic systems

    Publication Year: 1979, Page(s):866 - 878
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    The realization of linear time-varying systems specified by an analytic weighting pattern is approached in a novel manner using an algebraic framework defined over the ring of analytic functions. Realizations are given by a state representation consisting of a first-order vector differential equation and an output equation, both with analytic coefficients. Various new criteria for realizability ar... View full abstract»

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  • Three-phase induction motor impulse drive method

    Publication Year: 1979, Page(s):834 - 842
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A three-phase induction motor is successfully driven in a stepwise motion, that is, one small rotating angle of the motor shaft at a time. This is accomplished by applying a three-phase power source voltage in pulse form through thyristors to the primary winding of the motor. The drive method based on this entirely new principle is dubbed "impulse drive." It is classified into six types with somew... View full abstract»

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  • A Schur method for solving algebraic Riccati equations

    Publication Year: 1979, Page(s):913 - 921
    Cited by:  Papers (534)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    In this paper a new algorithm for solving algebraic Riccati equations (both continuous-time and discrete-time versions) is presented. The method studied is a variant of the classical eigenvector approach and uses instead an appropriate set of Schur vectors, thereby gaining substantial numerical advantages. Considerable discussion is devoted to a number of numerical issues. The method is apparently... View full abstract»

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  • Technique fixation and the Routh-Hurwitz criterion

    Publication Year: 1979, Page(s):987 - 988
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The ε-method of the Routh-Hurwitz criterion is shown to be sufficiently robust to reject the assumption that a system parameter can be of order ε. View full abstract»

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  • A transformation for necessary optimality conditions for systems with polynomial nonlinearities

    Publication Year: 1979, Page(s):983 - 985
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This work shows a new formulation means to obtain the optimal control for systems having polynomial nonlinearities by using functional analytic methods. The polynomic system is reduced to a quadratic form by introducing a set of pseudostate variables and the structure of the system is characterized by a set of matrices. A new set of optimizing equations is obtained and the necessary and sufficient... View full abstract»

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  • A new tracker for air-to-air missile targets

    Publication Year: 1979, Page(s):900 - 905
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    An extended Kalman filter is developed to aid the tracking of an air-to-air missile from a maneuvering target aircraft. The filter exploits knowledge of the dominant aerodynamically induced lift and drag forces of a nonthrusting missile employing proportional navigation guidance, and it also accounts for the dynamic lag and bandwidth effects of the missile seeker, guidance, and control systems. In... View full abstract»

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  • Teams with variable precision information structures: A model for organizational form

    Publication Year: 1979, Page(s):988 - 990
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Motivated by considerations of optimal organizational form for a firm, a model is constructed that describes an organization as a team, each of whose members has access to the same basic information seen through noisy channels. The precision of the information received through the channels are the control parameters of the problem and serve to characterize the organization. A general linear-quadra... 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