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IEEE Transactions on Automatic Control

Issue 2 • April 1969

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Displaying Results 1 - 25 of 35
  • [Front cover and table of contents]

    Publication Year: 1969, Page(s): 0
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    Freely Available from IEEE
  • Generation of sensitivity functions for linear systems using low-order models

    Publication Year: 1969, Page(s):123 - 130
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1061 KB)

    New proofs are given for the recently demonstrated total symmetry and complete simultaneity properties for the companion canonic form for single-input linear time-invariant controllable systems. These proofs result in a convenient closed-form expression for the complete simultaneity property. The use of these properties to generate by onenth-order sensitivity model all the sensitivity f... View full abstract»

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  • Control system for use in the measurement of ultrasmall torques

    Publication Year: 1969, Page(s):190 - 192
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (471 KB)

    A control system is described which is one of the major functional subdivisions of the apparatus in an experiment to measure Newton's universal gravitational constantG. In this experiment small masses are allowed to accelerate toward larger masses for a relatively long period of time. From the measured acceleration and the known magnitude of the masses, the gravitational force can be de... View full abstract»

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  • Adaptive sampling technique

    Publication Year: 1969, Page(s):200 - 201
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    An adaptive sampling technique utilizing the first three terms of a Taylor series expansion about thenth sampling instant for the error signal in an error-sampled feedback control system is presented. The necessary rules for determining the sign convention used in applying the technique are given along with an example illustrating the method. The procedure basically depends on the deter... View full abstract»

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  • Hybrid implementation for sampled-data controllers

    Publication Year: 1969, Page(s):202 - 203
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    A hybrid implementation for generalized digital filters in canonical form is presented, which uses analog elements for multiplication and summation and digital elements for storage (time delay). The hybrid controller is designed to realize virtually any compensation function up to three zeroes over three poles in thezdomain with any sampling frequency up to several thousand hertz. Exper... View full abstract»

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  • Generation of Liapunov functions for time-varying nonlinear systems

    Publication Year: 1969, Page(s): 211
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (173 KB)

    A procedure for the generation of Liapunov functions for time-varying nonlinear systems is described. A composite differential one-form is derived from the basic system equations. A line integral of the one-form, withtheld constant, produces the candidate for a Liapunov function. An example is included. View full abstract»

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  • Comments on "Optimization of discrete-time systems with combined modulation"

    Publication Year: 1969, Page(s):214 - 215
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A method analogous to that developed by Jordan and Polak is used to determine the optimal pulse-amplitude pulse-width open-loop control of continuous systems. Some recent results by Nardizzi and Bekey are checked and an extension to the case of nonequally spaced sampling instants is shown. View full abstract»

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  • Recursive algorithm for the calculation of the adaptive Kalman filter weighting coefficients

    Publication Year: 1969, Page(s):215 - 218
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (494 KB)

    The optimal discrete adaptive Kalman filter, as presented by Magill, necessitates the iterative calculation of a weighting coefficient for each value of the quantized parameter space. This correspondence proposes a new recursive algorithm for the calculation of the weighting coefficients and compares it to the weighting coefficient algorithm of Magill. When there areLelements in the a p... View full abstract»

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  • Correction to "A note on optimal linear regulators with incomplete state feedback"

    Publication Year: 1969, Page(s): 218
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (149 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1969, Page(s): 0
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    Freely Available from IEEE
  • Optimum synchronization of some saturated control systems

    Publication Year: 1969, Page(s):198 - 199
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Optimum control theory results are applied to find a relationship among the linear region limits of the error, of the output velocity, and of the output acceleration of a typical linear system, to provide minimum time synchronization for inputs causing saturation. This relationship is extended to the case of synchronization to a reference moving at a constant velocity. View full abstract»

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  • A note on error analysis in differential dynamic programming

    Publication Year: 1969, Page(s):197 - 198
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    In [1]-[4] new algorithms for determining optimal control of non-linear systems are described. This correspondence provides by means of an error analysis alternative justification for the neglect of certain terms in the derivation of those algorithms. View full abstract»

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  • Asynchronous quenching of the van der Pol oscillator

    Publication Year: 1969, Page(s):212 - 214
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Results of analog computer experiments are presented which indicate that the phenomenon known traditionally as asynchronous quenching is actually synchronization at large values of the detuning parameter, as had been proposed earlier by Pengilley and Milner. The relationship of these results to earlier analyses of van der Pol and Kobzarev is discussed and certain shortcomings of the Minorsky strob... View full abstract»

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  • Popov-like stability criterion for a class of time-varying discrete systems

    Publication Year: 1969, Page(s):208 - 211
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A Popov-like stability criterion is derived for use in the analysis of a class of time-varying discrete control systems. The class of systems consists of a time-varying gain followed by a causal time-invariant discrete convolution operator. The stability criterion provides a simple graphical means of obtaining stability information which complements the existing information for this class of syste... View full abstract»

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  • The transfluxor as an accurate analog magnetic memory

    Publication Year: 1969, Page(s):176 - 182
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    The transfluxor can serve as the analog storage element which is needed to couple the digital process control computer to the analog process. It stores an analog command in a few milliseconds, and the value is sensed nondestructively for an indefinitely long period. In this system, a closed loop is used to set the analog level, with proportional and integral compensation to modulate the size of se... View full abstract»

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  • Unbiased estimator for identification of constant linear discrete systems

    Publication Year: 1969, Page(s):193 - 194
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    An unbiased estimator for real-time parameter identification and state estimation for constant linear discrete systems is presented. Bias correction is accomplished by taking account of the mean value of second-order terms which are generally neglected. The inclusion of the bias correction results in better performance for a quadratic cost criterion. View full abstract»

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  • Construction of the minimal time control for processes with bounded control amplitudes and rates

    Publication Year: 1969, Page(s):150 - 164
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2040 KB)

    Minimal time control of linear time-varying processes with bounded control amplitudes and rates is discussed. Based on the maximum principle, necessary conditions are given which include a specific modified adjoint solution. Two additional conditions that are associated with this modified adjoint solution are derived. These conditions are then utilized to develop a systematic method of constructin... View full abstract»

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  • Optimal discrete-time control system with cost for observation

    Publication Year: 1969, Page(s):165 - 175
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    The problem of how to select the total number and the spacings of the observations optimally when a constant cost is incurred for each observation taken is discussed. Approximate expressions for the criterion function with a fixed number of observations are obtained and are used to determine the optimal total number of observations. For a class of multidimensional systems with a dominant eigenvalu... View full abstract»

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  • Issue in brief

    Publication Year: 1969, Page(s):121 - 122
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    First Page of the Article
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  • "Manual and automatic control"

    Publication Year: 1969, Page(s):218 - 219
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

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  • On the stability of linear discrete-time systems

    Publication Year: 1969, Page(s):207 - 208
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In Anderson a connection of two types of stability: Liapunov stability, reflecting the internal stability of a system, and bounded-input bounded-output stability, reflecting the external stability of a system, has been established for time-varying linear finite-dimensional dynamic systems which may be represented in a special canonical form. This correspondence extends the connection to time-varyi... View full abstract»

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  • Invertibility of linear time-invariant dynamical systems

    Publication Year: 1969, Page(s):141 - 149
    Cited by:  Papers (268)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1368 KB)

    The question of inverting linear time-invariant dynamical systems has been of interest to control engineers for many years. An example of the nonstate-variable approach and application of this concept is the very well known work of Bode and Shannon in 1950. With the integration of state-variable descriptions and techniques into systems problems, the question has recently reappeared in a somewhat m... View full abstract»

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  • Compensator design for multivariable linear systems

    Publication Year: 1969, Page(s):130 - 134
    Cited by:  Papers (69)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The problem of the specification of the order and structure of a linear dynamic compensator in order to obtain arbitrary pole placement in a closed-loop linear system comprised of the compensator in cascade with a linear plant is discussed. A significant application of the theory is to the design of optimal systems in those cases where not all the state variables of the plant can be measured. Thes... View full abstract»

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  • Discrete systems with delays in control

    Publication Year: 1969, Page(s):196 - 197
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The problem of finding an optimal control in linear discrete systems with time delays in both the state variables and control variables is studied. View full abstract»

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  • Deadbeat response to parabolic inputs with minimum-squared error restrictions on ramp and step responses

    Publication Year: 1969, Page(s):199 - 200
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A linear error-sampled control system can be designed to track inputs of the form tkwith zero error in finite time. 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