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Volume 2, Issue 11
Displaying 1-12 of 12 articles from this issue
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[in Japanese]1963 Volume 2 Issue 11 Pages 835-842
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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[in Japanese]1963 Volume 2 Issue 11 Pages 843-853
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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[in Japanese]1963 Volume 2 Issue 11 Pages 854-862
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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[in Japanese]1963 Volume 2 Issue 11 Pages 863-870
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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[in Japanese]1963 Volume 2 Issue 11 Pages 871-880
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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Yasuo SHIMIZU, Tsutomu KIMURA1963 Volume 2 Issue 11 Pages 881-885
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSThere are various methods in measuring the grain size distribution. Manufactured for trial by the authors are two kinds of new apparatus which, based on the principle of centrifugal sedimentation, can measure the grain size by continuously recording the sedimentation process by means of light transmission. One of them is called a D. C. type in which the light receiver rotates together with the sedimentation cell and the other A. C. type in which the light receiver receives pulse-form light instead of rotating. Size distribution of grains of some photographic emulsions which are approximately 0.1-1.0μ in average diameter was measured by these apparatus. Satisfactory coincidence was obtained between the results by centrifugal method and electron microscope method regardless of different grain forms, spherical and tabular.View full abstractDownload PDF (1261K) -
Non-linear AnalysisToichiro NAKAGAWA1963 Volume 2 Issue 11 Pages 886-894
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSAs a series of previous paper, the author investigated some phenomena occurred in the process with the sense of a field engineer and studied “soft control” by which time delay oscillation and sub-harmonic oscillation can be damped. Analog computer was used for these approaches.View full abstractDownload PDF (1013K) -
Toichiro NAKAGAWA1963 Volume 2 Issue 11 Pages 895-902
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSSo far as is know, investigations on the passage of solids through the cement rotary kiln are focused only on the stational load and residence time of solids, instead of considering the controllability such as self-smoothing action at the transient time. The author, in this paper, describes his general approach to the self-controllability against the internal disturbance and to control problems concerned. It is his opinion that the controllability should be considered in kiln design.View full abstractDownload PDF (923K) -
Akito YOSHIDA, Toshiya MORISUYE1963 Volume 2 Issue 11 Pages 903-910
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSDescribed in this paper is analog simulation techniques for analysis of heat-conduction problems. Here is given a principle of analog simulation of heat-conduction by a lumped-parameter electric RC network, together with an illustration of the device. Also shown is an example of the analysis of steel ingot solidification by two dimension electric analog simulator. Accuracies of one and two dimension electric analog simulators are considered in detail. A new technique is introduced for simulation of variabl-parameter thermal systems by a simple constant-parameter RC network. The electric analog simulator has an accuracy good enough for practical use. Its operation speed is very high, usually about 50 times as fast as middle-class digital computers, Furthermore, the programming and handling of the electric analog simulator are quite simple.View full abstractDownload PDF (954K) -
Tadahiro KUBOTA1963 Volume 2 Issue 11 Pages 911-917
Published: November 10, 1963
Released on J-STAGE: May 24, 2011
JOURNAL FREE ACCESSIt is well known that tha input voltage vs speed characteristics of the separately excited type d. c. servomotor can be expressed by first order time lag element with some approximation. However, the same characteristics are yet unknown of the series and shunt types. The objective of this paper is to make some research on these characteristics both in theory and experiment. The differential equation of the shunt type is of variable coefficicnt system in the case of open loop and of nonlinear system in the case of closed loop. In the series type, both cases are of nonlinear system. In the series type, the applied voltage E is related, with some approximation, to the speed x as expressed in the following:
_??_
Whereas, in the shunt type,
_??_
(α: friction, k: proportional constant, Rf: field resistance, J: moment of inertia)
The time constant varies with the applied voltage. In the case of closed loop of the both types, the solutions can be obtained only by numerical analysis. The criterion of omission is also shown with the conclusion that resistance can be neglected in the series type, but not in the shunt type and that friction load should be taken into account in the series type, but is negligible in the shunt type. The experimental results satisfactorily coincide with theoretical ones.View full abstractDownload PDF (914K) -
Tomoaki MORINAGA, Hiroshi YAO1963 Volume 2 Issue 11 Pages 918-922
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSOne of the authors formerly reported that in case of reflux manipulation, equivalent dead time in temperature response of binary distillation column increases as temperature detector goes lower and that equivalent time constant has almost same value on any tray. From this fact, it can be easily expected that simple on-off control mode gives satisfactory results when temperature detector is installed on the upper tray. Presented in this paper are both experimental and theoretical data on proportional and onoff controls. It was proved that on-off control gives satisfactory results. Experimental values on temperature cycling fairly coincide with theoretical ones.View full abstractDownload PDF (618K) -
[in Japanese]1963 Volume 2 Issue 11 Pages 923-927
Published: November 10, 1963
Released on J-STAGE: October 21, 2010
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