Journal of The Society of Instrument and Control Engineers
Online ISSN : 1883-8170
Print ISSN : 0453-4662
ISSN-L : 0453-4662
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Volume 7, Issue 7
Displaying 1-8 of 8 articles from this issue
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  • On the Optimizing Control Using Quadratic Form Model of Performance Index
    Katsuhiko FUJII, Yukio NISHIMURA
    1968 Volume 7 Issue 7 Pages 449-457
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.449
    JOURNAL FREE ACCESS
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    The extremum control methods which are developed up to date are classified as follows; (a) the method based on the linear approximation of performance index (P. I.) of the controlled object (e. g. gradient method), and (b) the method based on the higher order approximation of P. I. (e. g. extrapolation method). Each of them has its merits as well as shortcomings.
    The first half of this paper investigates the theoretical as well as experimental convergence properties of the two methods based on gradient and extrapolation schemes respectively, as they are applied to optimizing problems with the quadratic form models of P. I.. In the latter half, a new optimizing method is proposed, which is essentially based on the combination of these two methods. During the initial stages of this optimizing process, the modified gradient method is applied to examine whether it is possible to approximate P. I. with a quadratic model. When this is found possible, a proper quadratic form model is constructed using the results of experimental searches. Finally the extrapolation method is applied to this model.
    As this method is characterized by these dual functions, it is expected that it has following two desirable characteristics. Firstly, it can optimize a controlled object with general form of P. I. as the gradient method. Secondly, it does not have the weak point of the gradient method that the steps of manipulated variables become too small near the ridge of P. I.. In the simulated optimization study, it is shown that this method has the properties just described above.
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  • Manual Control of Multi-Variable Systems
    Kenichi YOSHIMOTO
    1968 Volume 7 Issue 7 Pages 458-466
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.458
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    In this paper, manual control of multi-variable systems is classified into three forms; (i) sequential control (ii) continuous tracking control and (iii) control in the systems in which certain limitations are imposed on state variables, and then the characteristics of human operators in the second control systems and the third control systems are analyzed. From these results some suggestions are obtained for the improvement of multi-variable tracking systems and for the reduction of learning or training time of human operators.
    In the second case, it is found that human operators control multi-variable systems by the time-sharing method, and a discrete model is proposed to represent such operations in multi-variable tracking systems.
    It is shown that characteristics of such systems can be improved by the use of adequate displays and controls.
    In the third case, it is found that trained human operators are able to perform almost optimal operation in simple systems, and that it is possible to reduce the time necessary for learning the optimal operation, if the optimal operation pattern is informed to the operators beforehand.
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  • Topics in Recent Control Theory
    Yoshiyuki SAKAWA
    1968 Volume 7 Issue 7 Pages 470-481
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.470
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  • Optimizing Control of Non-Linear Systems by Decomposition Principle
    Tow Level-Control Systems
    Kiyotaka SHIMIZU
    1968 Volume 7 Issue 7 Pages 482-491
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.482
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  • Computer Aided Design
    Tohru MOTO-OKA
    1968 Volume 7 Issue 7 Pages 492-501
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.492
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  • Approximate Formula on Torque-Speed Characteristics of Two-Phase Servomotors
    Isamu MATSUZUKA
    1968 Volume 7 Issue 7 Pages 502-505
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.502
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  • Integrating Digital Voltmeter and Digital Ohmmeter
    [in Japanese]
    1968 Volume 7 Issue 7 Pages 513-514
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.513
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  • [title in Japanese]
    1968 Volume 7 Issue 7 Pages 515
    Published: July 10, 1968
    Released on J-STAGE: November 26, 2009
    DOIhttps://doi.org/10.11499/sicejl1962.7.515
    JOURNAL FREE ACCESS
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