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Automatic Control, IEEE Transactions on

Issue 2 • Date April 1982

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Displaying Results 1 - 25 of 60
  • [Front cover and table of contents]

    Publication Year: 1982 , Page(s): 0
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    Freely Available from IEEE
  • Editorial: The state of technical manuscripts: Computer assisted measurements

    Publication Year: 1982 , Page(s): 293 - 294
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    Freely Available from IEEE
  • Comments on "On estimating the orders of an autoregressive process"

    Publication Year: 1982 , Page(s): 472 - 473
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    This correspondence makes some critical remarks on the method suggested in the above paper for estimating the order of an autoregressive process. An alternative method is then suggested. View full abstract»

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  • Correction to "Feedback properties of multivariable systems: The role and use of the return difference matrix"

    Publication Year: 1982 , Page(s): 514 - 515
    Cited by:  Papers (74)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (157 KB)  

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  • Comments on "An algorithm for decomposing a two-dimensional nonlinear vector field"

    Publication Year: 1982 , Page(s): 514
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    The algorithm is used to derive a closed form for the desired decomposition and potential function. View full abstract»

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  • Author's reply

    Publication Year: 1982 , Page(s): 514
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  • Correction to "On the application of matrix generalized inverses to the design of observers for time-varying and time-invariant linear systems"

    Publication Year: 1982 , Page(s): 515
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (98 KB)  

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  • Correction to "Suboptimality of decentralized stochastic control and estimation"

    Publication Year: 1982 , Page(s): 515
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  • Call for papers - application and control of doubly fed induction machines

    Publication Year: 1982 , Page(s): 515
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1982 , Page(s): 0
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  • Eigenvalue bounds for algebraic Riccati and Lyapunov equations

    Publication Year: 1982 , Page(s): 461 - 463
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (288 KB)  

    The majorization result of Wimmer [2] relating the eigenvalues of the matrices involved in the Lyapunov equation is extended to the algebraic Riccati equation. This result, coupled with certain results on the eigenvalue bounds for sum and product of matrices, yields several lower and upper bounds for the eigenvalues of the solution matrix of the algebraic Riccati and Lyapunov equations. View full abstract»

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  • Adaptive control and parameter estimation in Markov chains: A linear case

    Publication Year: 1982 , Page(s): 414 - 419
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    We consider a controlled Markov chain with finite state space, whose transition probabilities are assumed to depend linearly upon an unknown real parameter α. In particular, we study the asymptotic behavior of the maximum likelihood estimate of α under an arbitrary realizable control when α is known to belong to a given bounded interval on the line. We show that the estimate converges with probability one and characterize those realizations for which convergence does not lead to the true value. We also suggest corrections to the control policy which guarantee almost sure convergence to the true value. For the adaptive situation, where the control depends only on the current estimate of α and the present state, we show that the maximum likelihood estimate converges to a value α*indistinguishable from the true one under the feedback law induced by α*. View full abstract»

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  • The model-following problem for linear constant (A,B,C,D) quadruples

    Publication Year: 1982 , Page(s): 458 - 461
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    The aim of this note is to deal with the model-following problem (MFP) for linear constant ( A, B, C, D ) quadruples. In the first part, we tackle the MFP with state feedback, and we extend the results previously given by Morse [7] for ( A, B, C ) triples. The main result of this paper is given in the second part where we give necessary and sufficient conditions under which solutions using (regular) output feedback may exist. Such conditions were lacking up until now. View full abstract»

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  • Condition of vibrational stabilizability for a class of nonlinear systems

    Publication Year: 1982 , Page(s): 485 - 487
    Cited by:  Papers (9)
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    A notion of vibrational stabilizability for a class of nonlinear systems is introduced and analyzed. View full abstract»

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  • Combined phase and amplitude demodulation

    Publication Year: 1982 , Page(s): 476 - 478
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (304 KB)  

    For a combined phase and amplitude demodulation process, with an integrated Brownian phase and a log normal amplitude, the error performance of the optimal demodulator is studied by Monte Carlo methods. We found that in certain cases more amplitude variance can produce better phase tracking. Further, in these cases, the observations contain more information about the phase. View full abstract»

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  • An introduction to linear control systems

    Publication Year: 1982 , Page(s): 516 - 517
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  • An effective local dynamic strategy to clear congested multidestination networks

    Publication Year: 1982 , Page(s): 510 - 513
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (416 KB)  

    The solution of a local routing problem for a congested node with two alternative paths to M destinations of a traffic network is presented. The solution shows that the admissible state space is divided into a finite number of regions within which a different set of optimal flow conditions must be satisfied. A specific realization of these optimal conditions is presented which can be utilized by local node controllers in decentralized control strategies for larger networks. View full abstract»

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  • A state space model for interconnected rigid bodies

    Publication Year: 1982 , Page(s): 376 - 382
    Cited by:  Papers (21)  |  Patents (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (640 KB)  

    A state space model of interconnected rigid bodies is developed that is conceptually simple, employs a relatively small number of parameters for the representation of each link, and allows connection of an arbitrary number of elements in open or closed chains. The connection to other elements may be at arbitrary locations and with arbitrary joint constraints. Further, it allows for easy insertion of muscle-like actuators. The model involves three nonlinear feedback loops for each rigid body: local angular velocity, state feedback for connection and joint constraints, and finally, output muscle feedback. This model is most suitable for computer simulation of large natural and man-made systems. The basic characteristics of this model and two examples are presented. View full abstract»

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  • Controllability and observability for affine nonlinear Hamiltonian systems

    Publication Year: 1982 , Page(s): 490 - 492
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    It is shown that an affine nonlinear Hamiltonian system is "controllable" if and only if it is "observable," in the sense that strong accessibility implies local weak observability and vice versa. Furthermore, it is shown that a nonminimal Hamiltonian system can be reduced to a locally weakly observable and strongly accessible system, in such a way that the reduced system is again Hamiltonian. View full abstract»

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  • A stochastic control approach to group preventive replacement in a multicomponent system

    Publication Year: 1982 , Page(s): 387 - 393
    Cited by:  Papers (4)
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    A group preventive replacement problem is formulated in continuous time for a multicomponent system having identical elements. The dynamic programming equation is obtained in the framework of the theory of optimal control of jump processes. For a discrete time version of the model, the numerical computation of optimal and suboptimal strategies of group preventive replacement are done. A monotonicity property of the Bellman functional (or cost-to-go function) is used to reduce the size of the computational problem. Some counterintuitive properties of the optimal strategy are apparent in the numerical results obtained. View full abstract»

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  • Decentralized control of finite state Markov processes

    Publication Year: 1982 , Page(s): 426 - 431
    Cited by:  Papers (14)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (656 KB)  

    We are concerned with the control of a particular class of dynamic systems-finite state Markov chains. The information pattern available is the so-called one step delay sharing information pattern. Using this information pattern, the dynamic programming algorithm can be explicitly carried out to obtain the optimal policy. The problems are discussed under three different cost criteria-finite horizon problem with expected total cost, infinite horizon problem with discounted cost, and infinite horizon problem with average expected cost. The solution of the problem is possible with the one step delay sharing information pattern because, as in the centralized control of Markov chains, a separation principle holds (this is not true for multiple step delay sharing). Hence, the decentralized problem can essentially be reduced to a (more complicated) centralized one: this reduction is carried out in detail. With some modifications, the "policy iteration algorithm" and "Sondik's algorithm" are readily applied to find the optimal policies for these problems. View full abstract»

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  • New relationships between input-output and Lyapunov stability

    Publication Year: 1982 , Page(s): 481 - 483
    Cited by:  Papers (38)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    In this note we define a concept called "small signal Lp-stability," and show its relationship to Lyapunov stability. View full abstract»

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  • Hybrid models for state estimation in unit-train control

    Publication Year: 1982 , Page(s): 306 - 319
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1136 KB)  

    This paper constructs and analyzes certain unit-train models of a mixed lumped-distributed parameter character. These models allow construction of a filtering model for unit-train control in which grade forces and countervailing locomotive forces are treated as disturbances, while center of mass velocity control is decoupled from a stress control loop. The results are illustrated with a representative calculation. View full abstract»

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  • An optimal control approach to dynamic routing in networks

    Publication Year: 1982 , Page(s): 329 - 339
    Cited by:  Papers (44)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1024 KB)  

    This paper explores the application of optimal control theory to the problem of dynamic routing in networks. The approach derives from a continuous state space model for dynamic routing and an associated linear optimal control problem with linear state and control variable inequality constraints. The conceptual form of an algorithm is presented for finding a feedback solution to the optimal control problem when the inputs are assumed to be constant in time. The algorithm employs a combination of necessary conditions, dynamic programming, and linear programming to construct a set of convex polyhedral cones which cover the admissible state space with optimal controls. An implementable form of the algorithm, along with a simple example, is presented for a special class of single destination networks. View full abstract»

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  • A remark on nonlinear observability

    Publication Year: 1982 , Page(s): 489 - 490
    Cited by:  Papers (1)
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    The observability of a nonlinear system is related to a Lie subalgebra of the control Lie algebra. 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