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Automatic Control, IEEE Transactions on

Issue 2 • Date April 1980

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Displaying Results 1 - 25 of 61
  • [Front cover and table of contents]

    Publication Year: 1980 , Page(s): 0
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  • Editorial: Applications, systems evaluation, and components

    Publication Year: 1980 , Page(s): 149 - 150
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  • Comments on "A simple proof of the separation theorem for linear stochastic systems with time delays"

    Publication Year: 1980 , Page(s): 274 - 275
    Cited by:  Papers (2)
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  • Author's reply

    Publication Year: 1980 , Page(s): 335
    Cited by:  Papers (1)
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  • Comments on "Recursive filtering algorithm for a two-dimensional system"

    Publication Year: 1980 , Page(s): 336 - 337
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (220 KB)  

    General comments on quarter-plane causal 2-D filters are proffered, and logical errors in the derivation of a recent algorithm of this ilk are discussed. View full abstract»

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  • Author's reply

    Publication Year: 1980 , Page(s): 336
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  • Author's reply

    Publication Year: 1980 , Page(s): 337 - 338
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  • Self-organizing control of stochastic systems [Book reviews]

    Publication Year: 1980 , Page(s): 339 - 340
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  • [Back cover]

    Publication Year: 1980 , Page(s): 0
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  • A scaling theory for linear systems

    Publication Year: 1980 , Page(s): 197 - 207
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (952 KB)  

    In this paper we develop a theory of scaling for rational (transfer) functions in terms of transformation groups. In particular, we identify two different four-parameter scaling groups which play natural roles in studying linear systems and investigate the effect of scaling on Fisher information and related statistical measures in system identification. The scalings considered include change of time scale, feedback, exponential scaling, magnitude scaling, etc. The scaling action of the groups studied in this paper is tied to the geometry of transfer functions in a rather strong way as becomes apparent in our examination of the invariants of scaling. As a result, the scaling process also provides new insight into the parameterization question for rational functions. View full abstract»

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  • A methodology for generation of optimal schedules for an underground railway system

    Publication Year: 1980 , Page(s): 217 - 222
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (568 KB)  

    This paper presents a methodology developed for the automatic generation of optimal schedules for the north-south line of the Metro Company of São Paulo. An analytical model was created to represent the system behavior: train and passenger movements. Based on the model characteristics, the goal-coordination method, due to Lasdon and Tamura, was utilized to produce the Optimal reference schedule by considering comfort levels for passengers, the number of trains in the line, and the performance of trains. The optimal schedule for the morning peak period was generated and a great improvement over the current strategy was obtained. View full abstract»

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  • Prediction of autoregressive lognormal processes

    Publication Year: 1980 , Page(s): 292 - 293
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    In this note, the one-step prediction of autoregressive (AR) lognormal processes is considered. Minimum-risk solutions of this problem are briefly discussed and then numerically compared using simulated data. View full abstract»

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  • Stable feedback control of bilinear systems

    Publication Year: 1980 , Page(s): 302 - 306
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (432 KB)  

    In this paper, we present a feedback control law for a class of bilinear plant. It exhibits a bang-bang structure using a linear switching function. Asymptotic stability of the closed-loop system is derived by applying a generalized version of the Lyapunov's direct method. The primary advantage of our approach lies in its simplicity, indicating that the field of potential applications is quite wide. In order to test use and effectiveness of the procedure, the practical case of a continuous stirred tank reactor is investigated by digital simulation. View full abstract»

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  • On the absolute stability of continuous-time nonlinear systems

    Publication Year: 1980 , Page(s): 332 - 334
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    Sufficient conditions in frequency domain are derived for the absolute stability of a class of continuous-time nonlinear feedback systems. The results are obtained via Lyapunov's direct method and are presented in a more general setting wherefrom some of the existing stability criteria [1], [2] can readily be obtained. View full abstract»

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  • Algorithms for multicriterion optimization

    Publication Year: 1980 , Page(s): 177 - 186
    Cited by:  Papers (6)
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    In this paper we report new methods for obtaining a noninferior solution to a multicriterion optimization problem. Unlike existing methods, which convert vector-valued optimization problems into scalar-valued ones, our methods treat the multiple objectives as they are, without employing an artificial single objective. Each of the new methods is readily implementable and convergent to a local noninferior solution under suitable assumptions. We also propose interactive methods for locating a noninferior solution that will be satisfactory to the decision maker. View full abstract»

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  • Testing controllability and constructibility in discrete linear systems

    Publication Year: 1980 , Page(s): 297 - 298
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    A simple criterion for complete controllability and constructibility of discrete-time linear constant systems is given in terms of left and right coprimeness of certain polynomial matrices. View full abstract»

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  • On minimal canonical realization from input-output data sequences

    Publication Year: 1980 , Page(s): 309 - 312
    Cited by:  Papers (3)
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    An algorithm is presented for determining the state model of a discrete system from input-output a data in canonical form. The proposed method is based on a canonical input-output representation from which the Input matrix and the nondynamic part can be found by a simple recursive relation. View full abstract»

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  • Extension of computation beyond the limit of initial normal interval in Walsh series analysis of dynamical systems

    Publication Year: 1980 , Page(s): 317 - 319
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (272 KB)  

    This paper presents a method of extending computation beyond the limit of the initial normal interval in Walsh series analysis of dynamical systems. The solution may be extended over contiguous normalized intervals of time to any length. The procedure avoids operational matrices of prohibitively large size and reduces the computational effort to a minimum while retaining accuracy. As a by-product of the method, the solution at the segment junctions is also available in addition to the one in piecewise constant form. The formula also provides information regarding the stability of the resulting progression. View full abstract»

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  • State-space discrete systems: Computation of the transition matrix

    Publication Year: 1980 , Page(s): 296 - 297
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    A correction is given to an algorithm for the computation of the state-transition matrix, presented in a paper by Roesser [1]. View full abstract»

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  • A note of Pearlman's state-space equivalence theorem

    Publication Year: 1980 , Page(s): 335 - 336
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    Using Carleman linearization and known results on state-affine systems, a simplified proof of Pearlman's [3] state-space equivalence theorem is given. View full abstract»

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  • Transfer function matrix synthesis of two-dimensional systems

    Publication Year: 1980 , Page(s): 321 - 324
    Cited by:  Papers (3)
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    This paper considers the problem of matching the transfer function matrix of a given two-dimensional system to that of a desired two-dimensional model using output feedback. The approach followed is essentially based on the idea of equating the coefficients of the like w^{i}z^{j} terms in the relationship T_{c}(w,z)= T_{m}(w,z) where T_{c}(w,z) is the closed-loop transfer function matrix and T_{m}(w,z) is the model transfer function matrix. This approach reduces the problem to that of solving a linear system of equations. Furthermore, necessary and sufficient conditions are established for exact matching. An example is included to illustrate the proposed method. View full abstract»

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  • Observing the slow states of a singularly perturbed system

    Publication Year: 1980 , Page(s): 277 - 280
    Cited by:  Papers (7)
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    This paper considers observers of slow states in singularly perturbed systems. Upper bounds are derived on observer error due to use of a reduced-order model in the observer. This error is shown to be 0(μ), where the singular perturbation parameter μ is a measure of the separation between the slow and fast eigenvalues of the full-order system. View full abstract»

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  • An implementation of estimation techniques to a hydrological model for prediction of runoff to a hydroelectric power station

    Publication Year: 1980 , Page(s): 151 - 163
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1016 KB)  

    Parameter and state estimation algorithms have been applied to a hydrological model of a catchment area in southern Norway to yield improved control of the household of water resources and better economy and efficiency in the running of the power station, as experience proves since the system was installed on-line in the summer of 1978. A nonlinear conceptual state-space model of a Nordic hydrological system is presented in this paper. The model is transformed analytically to a piecewise linear time-discrete form in order to obtain straightforward updating of the gain matrix in the estimator through solution of the Riccati equation. Estimator gains can then be expressed approximately as a function of the state. Discharge coefficients (time constants) are estimated by the maximum likelihood method. Results are presented which show estimated and observed runoffs, and estimates of the state variables. View full abstract»

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  • The singular value decomposition: Its computation and some applications

    Publication Year: 1980 , Page(s): 164 - 176
    Cited by:  Papers (216)  |  Patents (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1200 KB)  

    We provide a tutorial introduction to certain numerical computations both in linear algebra and linear systems in the context of bounded arithmetic. The essential characteristics of bounded arithmetic are discussed in an introductory section followed by a review of the fundamental concepts of numerical stability and conditioning. The singular value decomposition (SVD) is then presented along with some related comments on the numerical determination of rank. A variety of applications of the SVD in linear algebra and linear systems is then outlined. A final section discusses some details of the implementation of the SVD on a digital computer. An Appendix is provided which contains a number of useful illustrative example. View full abstract»

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  • Algebraic separation in realizing a linear state feedback control law by means of an adaptive observer

    Publication Year: 1980 , Page(s): 238 - 243
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (728 KB)  

    Based on a novel adaptive observer, which does not require signal boundedness in its stability proof, an algebraic separation property of linear state feedback control and adaptive state observation is established. This means, whenever a linear, stabilizing state feedback control law is realized with the state replaced by the state estimate of the given stable adaptive observer, then the resulting nonlinear control system is also globally asymptotically Lyapunov stable with respect to the initial state and parameter observation error of the adaptive observer. In particular, no assumptions on the system dynamics nor on the speed of the adaptation are made. 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

Full Aims & Scope

Meet Our Editors

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