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IBM Journal of Research and Development

Issue 4 • Date July 1967

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Displaying Results 1 - 16 of 16
  • Preface to Controls Papers

    Publication Year: 1967, Page(s): 360
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (106 KB)

    In this issue the Journal takes special note of work at IBM in the field of automatic feedback control. We offer a collection of nine papers on various problems in control theory and its application. Our intent in assembling the collection has been to identify some current projects that will give our readers an idea of the range and variety of controls problems that are engaging the interest of IB... View full abstract»

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  • A Generalized Legendre-Clebsch Condition for the Singular Cases of Optimal Control

    Publication Year: 1967, Page(s):361 - 372
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    For certain optimal control problems, some of the extremal trajectories generated by simultaneous solution of the state and adjoint equations may include arcs of a special character, called “singular” arcs. The optimality of singular arcs has been the subject of considerable uncertainty, since the classical criteria are inapplicable or inconclusive. This uncertainty has recently been... View full abstract»

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  • Rapid Computation of Optimal Trajectories

    Publication Year: 1967, Page(s):373 - 382
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (541 KB)

    A generalized “indirect” method of solving two-point boundary value problems is discussed in application to the problem of computing optimal trajectories in a vacuum. Improved numerical techniques make the method extremely fast when a good initial estimate of the solution is available, but it also converges, more slowly, from initial estimates that are far from the solution. Transver... View full abstract»

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  • Some Results in Two-Point Boundary Value Problems

    Publication Year: 1967, Page(s):383 - 388
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (425 KB)

    Two new results in two-point boundary value problems are presented. The first is a modified method of adjoints which, under certain circumstances, will solve numerically two-point boundary value problems faster than the standard method of adjoints. The second result shows that Friedrichs' solution of the operator equation P(x) = 0 is really the modified Newton method. Kantorovich's sufficiency con... View full abstract»

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  • Computer Control of a Paper Machine—an Application of Linear Stochastic Control Theory

    Publication Year: 1967, Page(s):389 - 405
    Cited by:  Papers (17)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (839 KB)

    This paper describes an attempt to apply linear optimal control theory to computer control of an industrial process. The applicability of the theory is discussed. Particular attention is given to the problem of obtaining a mathematical model of process dynamics and disturbances. Results of actual measurements as well as results from on-line control experience are presented. View full abstract»

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  • On-Line Identification of Process Dynamics

    Publication Year: 1967, Page(s):406 - 426
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (930 KB)

    Two methods similar to regression analysis are applied to the estimation of parameters in a dynamic process equation. One method uses a residual based directly on the differential equation for the process model. The second method forms the residual from the integro-differential equations derived by integration of the original differential equation with respect to time. The two methods are shown to... View full abstract»

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  • Sensitivity Constrained Optimal Control Synthesis

    Publication Year: 1967, Page(s):427 - 435
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (507 KB)

    A constraint on the sensitivity to plant parameter uncertainties is introduced in the synthesis of optimal linear controls by adding a sensitivity function to a quadratic form performance criterion. The synthesis is carried out in the frequency domain using both conventional and Bode sensitivity functions; open-loop and closed-loop controls are of necessity treated separately because the sensitivi... View full abstract»

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  • Synchronization of Traffic Signals in Grid Networks

    Publication Year: 1967, Page(s):436 - 441
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (402 KB)

    A method of synchronizing traffic signals interconnected in an arbitrary network is presented. The procedure consists of using a simplified mathematical model for traffic to relate the vehicular delay within the network to the signal parameters and then searching over these parameters to minimize the delay. The technique has been used to synchronize traffic signals in San Jose, California and has ... View full abstract»

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  • Design Principles for Sampled-Data Systems with Application to Attitude Control of a Large, Flexible Booster

    Publication Year: 1967, Page(s):442 - 451
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (574 KB)

    This paper reviews Z-transform and W-transform theory and discusses in detail its application to dynamic compensation of linear sampled-data control systems. Both sampled-data (digital) and continuous-data (analog) compensator synthesis methods are discussed. With respect to digital compensator design, w-plane closed-loop pole positions are related to time response characteristics, analogous to th... View full abstract»

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  • A Computer-Operated Manufacturing and Test System

    Publication Year: 1967, Page(s):452 - 460
    Cited by:  Papers (2)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (511 KB)

    A computer system utilizing duplexed central processors and three types of satellite computer terminals has been developed for the control of manufacturing processes and product tests. The system was designed for use in a plant producing data processing equipment. The prime objectives of the project were (1) to reduce the time required for the plant to accept new products or product changes, (2) t... View full abstract»

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  • Properties of Insulating Thin Films Deposited by RF Sputtering

    Publication Year: 1967, Page(s):461 - 467
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (427 KB)

    The use of RF sputtering for the deposition of thin insulating films at relatively low temperatures (50° to 500°C) has been shown to yield films of very high quality. Methods for investigating the properties of RF-sputtered films are discussed in detail, and these indicate that such films are excellent stable insulators. Potential utility as an encapsulant for transistor structures h... View full abstract»

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  • The Magnetization Mechanism in Single-Crystal Garnet Slabs Near the Compensation Temperature

    Publication Year: 1967, Page(s):468 - 476
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (640 KB)

    The magnetization mechanism has been studied in detail in single-crystal slabs of (111), (110) and (100) samples of gadolinium iron garnet (GdIG) near the compensation temperature. Using Faraday-effect and induction-type hysteresigraphs, the hysteresis loops have been measured in the sample plane and perpendicular to it, respectively. Measurements have been made at various temperatures, thus allow... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journals

    Publication Year: 1967, Page(s):477 - 483
    IEEE is not the copyright holder of this material | PDF file iconPDF (563 KB)
    Freely Available from IEEE
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1967, Page(s):484 - 485
    IEEE is not the copyright holder of this material | PDF file iconPDF (234 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1967, Page(s):486 - 488
    IEEE is not the copyright holder of this material | PDF file iconPDF (228 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1967, Page(s):490 - 491
    IEEE is not the copyright holder of this material | PDF file iconPDF (224 KB)
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center