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 2, Issue 9
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 9 Pages 655-664
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.655
    JOURNAL FREE ACCESS
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  • Load Characteristics of Valve-controlled Rotary Piston Hydraulic Motor
    Kenzo IKEDA
    1963 Volume 2 Issue 9 Pages 665-671
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.665
    JOURNAL FREE ACCESS
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    Given in this paper is a mathematical approach on the behavior of dynamic characteristics of a valvecontrolled rotary piston hydraulic motor when subjected to the load of controlled process. This approach is further extended to a procedure for linearizing the above and its results are discussed, too.
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  • Feedback Compensation
    Keisuke IZAWA
    1963 Volume 2 Issue 9 Pages 672-675
    Published: September 10, 1963
    Released on J-STAGE: May 24, 2011
    DOIhttps://doi.org/10.11499/sicejl1962.2.672
    JOURNAL FREE ACCESS
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    Of three modes of compensation of a feedback control system, the feedforward is equivalent to feedback compensation and the feedback compensation has much wider applicability than in the series compensation when the physical realizability of the compensating element is considered. The originally given control system (uncompensated) of Fig. 3 can equivalently be transformed to the one shown in Fig. 7 (b), after making a proper feedback compensation as follows (Fig. 6)
    H=Go-Gp
    where, Go is a relatively simple transfer function to be defined by a designer and fulfils the following conditions:
    _??_
    Since the feedback loop appearing in Fig. 7 (b) contains very simple transfer elements, its characteristics can be thoroughly discussed. This means that synthesis of the feedback system from ν to xo is relatively simple. Following this idea, the task of design of feedback compensation would become straightforward and exact. Specific requirements on the system output x would demand some retouch on the form of Go (s) and/or on the parameter-selection of Ge. This procedure is independent of the type of Gc, which could be of any type such as on-off, P, PI, I, PID or sampling.
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  • Numerical Analysis of Pipe Line Network and Dirichlet-Neumann Problem of Potential
    Jiro INOUE
    1963 Volume 2 Issue 9 Pages 676-680
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.676
    JOURNAL FREE ACCESS
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    Numerical analysis method of pipe line with digital computer is developed from the analogy of Dirichlet-Neumann problem of potential. Calculation example of model network flow is shown in tables.
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  • Dynamic Behavior of Forced Flow Evaporator
    Hajime TAKENOUCHI
    1963 Volume 2 Issue 9 Pages 681-687
    Published: September 10, 1963
    Released on J-STAGE: May 24, 2011
    DOIhttps://doi.org/10.11499/sicejl1962.2.681
    JOURNAL FREE ACCESS
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    Dynamic behaviors of through-flow boiler are considered as serial connection of those of economizer, evaporator and superheater. Behaviors of economizer and superheater have been already analysed in several papers. This paper deals with the dynamic analysis of through-flow evaporator in case its pressure drop is negligible. Boundary points of evaporator are considered to be the ones fixed to the starting and terminating points of evaporation under the standard equibrium condition. Conclusion obtained from the analysis my be summerized as follows:
    Dynamic behavior of pressure is represented by:
    _??_
    This equation shows that through-flow boiler and drum type boiler are similar each other in dynamic behavior of pressure. Dynamic behavior of enthalpy at outlet point is represented by: ie=Fi (s) ii+Fr (s) r2+Fq (s) qi+Fp (s) P
    Due to the change of outlet enthalpy, the pressure has self-regulation characteristic.
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  • New PID Setting Resistor Using CdS Photoconductive Cells
    Isamu OHNO, Akira SUMI
    1963 Volume 2 Issue 9 Pages 688-696
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.688
    JOURNAL FREE ACCESS
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    This paper describes a contactless variable resistor using CdS photoconductive cells, which has been developed to be applied to PID function generator of electronic process controller. Proportional, integral and derivative functions, control functions of electronic controller, are generated by resistor-capacitor networks and sensitivity of PID functions is set by adjusting the value of resistors. As a PID setting resistor, carbon slide resistor and multi-position switch with calibrated resistors have been used. Either of them, however, is not perfect for use as a variable resistor in controller, because it is difficult for the former to produce logarithmic resistance variation characteristics and on the other hand, it is impossible for the latter to continuously vary the resistance. Pointed out as a defect common to both of them is a poor contact between brush and contacts. The authors have developed a new variable resistor which is suitable for application to PID setting resistor. Its principle comes from the fact that the inner resistance of CdS photoconductive cell is inversely proportional to the intensity of illumination exposed to the cell surface. The new PID setting resistor consists of three units, each of which is composed of a lamp, CdS photoconductive cell and a shadow mask. The shadow mask is placed between the lamp and the CdS photoconductive cell. The cell resistance can be controlled by adjusting either the position of the shadow mask or the lamp voltage, in other words, by regulating the illumination intensity exposed to the cell surface. The photo-variable resistor may be used in place of ordinary resistors not only for usual controllers, but also for adaptive controllers in which PID functions are remotely set by the output signal of the computers.
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  • Dynamic Characteristics of Hydraulic Servomotors in High Frequency Region
    Kazuo NAKANO
    1963 Volume 2 Issue 9 Pages 697-706
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.697
    JOURNAL FREE ACCESS
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    Frequency response characteristics of valve-controlled hydraulic servomotors with heavy loads were analytically obtained in simple forms. It was confirmed that the amplitude of load pressure in frequency responses is larger than that of supply pressure whenever the frequency of sinusoidal input signal is nearly equal to break frequency or undamped natural frequency of hydraulic servomotors. Frequency responses of valve-controlled hydraulic servomotors are characterized by the peculiar relations between gain attenuation characteristics and phase lag characteristics. Frequency responses of hydraulic servomotors were measured under several kinds of load conditions. Both experimental and theoretical results were in comparatively good coincidence each other. As its result, synthesis of hydraulic systems has become to be reasonably made.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    1963 Volume 2 Issue 9 Pages 708-714
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.708
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 9 Pages 715-718
    Published: September 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.715
    JOURNAL FREE ACCESS
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