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 1, Issue 1
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 1 Issue 1 Pages 1
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 1 Issue 1 Pages 2
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.2
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 1 Issue 1 Pages 3-14
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.3
    JOURNAL FREE ACCESS
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  • New Analog-Digital Converter Circuit with Negative Resistance Element
    Masamichi SHIMURA
    1962 Volume 1 Issue 1 Pages 15-22
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.15
    JOURNAL FREE ACCESS
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    Self-oscillation is observed in a transmission line with a current-controlled negative resistance element on one end. Generally, the current wave form through the element is in pulse form and its frequency changes discretely according to the bias current of the element. Based on these facts is the principle of new analog-digital converter described in this paper which is very simple in construction. This circuit can also be used as a pulse generator, pulse frequency modulator with discontinuous levels, etc.
    In this paper, the circuit is theoretically analyzed by the Witt's method and the results of the fundamental experiment are shown using a PNPN diode and a Double Base diode as the negative-resistance element.
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  • Boundary Displacement Type Magnetic Recording Heads
    Saburo UEMURA, Kengo MATSUMOTO
    1962 Volume 1 Issue 1 Pages 23-28
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.23
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    This report describes boundary displacement typemagnetic recording, mainly its BD heads. The magneti ccircuits of BD head were analyzed and then what spoils the linearity of BD head was explained theoretically and experimentally. Thus, god linearity of BD head was obtained by saturating laminated core tip and by contacting the biasing magnet on the core directly without yoke. This saturation increased the sensitivity of boundary displacement vs. signal current. As to the frequency response of BD head, the Ioss was decreased up to the value of-4.5 db at 10kc byusing ferrite coreinstead ofnon-laminated core. Aiso reported inthis paperare multi-channel headsand special BD head.
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  • Continuous Measurement of Frequency Response
    Yoichi KAYA
    1962 Volume 1 Issue 1 Pages 29-35
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.29
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    A method for measuring the frequency response of the process in operation has been proposed. The measuring equipment is composed of two resonance circuits, two multipliers, four unit lag circuits, three integrators and control relays. The measurable frequency range, which mostly depends on the dynamic characteristics of multipliers, is between 1 and 0.001 cycle when servo multipliers are used. The measuring accuracy is within 5%.
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  • Transfer-Function of Two-Phase Servo-Motor
    Toshio NUMAKURA
    1962 Volume 1 Issue 1 Pages 36-42
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.36
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    The purpose of this paper is to obtain the transfer-function of two-phase servo-motor, especially its time-constant.
    The two-phase servo motor is usually employed as an actuator of instrument servomechanism such as self-balancing recorder or servo-computing machine. The control winding of motor is usually connected to the anode of vacuum-tube. Under this condition, many people have experienced that some of the servomotors rotate even when the control voltage is not applied to the control winding.
    According to the author's analysis, this phenomenon occures when the secondary resistance r2 is low compared with magnetizing inductance Xm, of the equivalent circuit of the motor. In such case, the electromechanical time-constant of the motor becomes negative.In consequence, the author came to the conclusion that it is most preferable to chose the value of r2 between 1.5 xm, and 2xm, because between these values, time-constant is minimized while the stall-torque is not so reduced.
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  • Analysis of Adiabatic Shield Control
    Ichiro SUGIURA
    1962 Volume 1 Issue 1 Pages 43-57
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.43
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    In order to find the characteristics of the shield control of the adiabatic calorimeter, two different cases are analyzed and a general formula for selecting the best settings of controller (parameters) is established. In one case, a conventional PID controller and in the other case an additional integrator cascaded to it, are used to control the calorimeter system. The temperature range is 0-600°C and an accuracy to be attained is ±0.01%.
    Some of the major non-linearities of the system being controlled are taken into consideration. They are the non-linear variation of the heat capacity (C1) of test piece and the temperature change of heat loss (σ23) of the shield.
    The major factors which cause an error are large outer disturbances, the drastic temperature change in C1 and sharp rate of change in σ23 at elevated temperature. If the total static gain k of the part of system between the detecting and final control elements can be made big by using a high gain DC amplifier and a magnetic amplifier, it is possible, except in the case where dC1/dθ1 has large value while C1 itself stays small, to neglect such non-linear terms as being smaller by one order than the terms containing k throughout the range of operation. Then the system is approximately linear and the influence of temperature dependency of C1 and σ23 becomes equivalent to the effect of disturbances in the heat input to test piece.
    The transition of the error caused by these temperature changes in C1 and σ23 is tracked with an analogue computer and it is checked whether or not the controller settings programed for linear cases are adequate. It is found that with the PID+I type controller, a satisfactory control is achieved throughout the range of temperature variation whereas with the mere PID type controller, it is impossible to eliminate the stationary error of considerable magnitude at higher temperature.
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 1 Issue 1 Pages 58-61
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.58
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 1 Issue 1 Pages 62-63
    Published: January 10, 1962
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.1.62
    JOURNAL FREE ACCESS
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