Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 22, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • The Control of Solid Flow Rate in a Pneumatic Conveyer
    Shigeru MATSUMOTO, Hiromi HARAKAWA, Mutsumi SUZUKI, Shigemori OHTANI
    1985 Volume 22 Issue 1 Pages 3-10
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.3
    JOURNAL FREE ACCESS
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    The control characteristics of the solid flow rate are investigated for a pilot scale pneumatic conveyer. The experimental system is a pressure-type vertical conveyer consisting of a 20mm-I. D. and 5.6m long transport line. Under a constant air flow rate, the solid flow rate was controlled by manipulating a vibrating feeder based on the feedback of the output signal from the hand-made impact flow-meter which was set downstream of the gas-solid separator. The control system was implimented on a personal computer. Since the output signal from the impact flow-meter contained significant amounts of random noise, a Kalman filter was applied as an observer. The controller was designed based on the discrete I-PD control formula. The formula is a kind of partial model matching method developed by Kitamori. Satisfactory control performance was achieved both as a regulator and as a servo-mechanism for the pilot plant.
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  • Triaxial Compression Test of Powder in Low Stress Ranges
    Keijiro TERASHITA, Syuji KOMURA, Kei MIYANAMI
    1985 Volume 22 Issue 1 Pages 11-16
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.11
    JOURNAL FREE ACCESS
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    A triaxial compression test of coarse and fine powder in low stress (lateral pressure) ranges was performed to characterize the shear fracture surfaces under varying lateral pressure (minimum stress, σ3) and to determine the principal stress difference-strain curve and internal friction factors. The results obtained were compared with those of a direct shear test. (1) The shear fracture surface under triaxial compression appears in a more definite outline with an increase in 3 and decrease in particle size. (2) Regardless of the kind of powder, the shearing process diagrams in the triaxial compression test and direct shear test show similar patterns (σ1-σ3 vs σs and τx vs δs). (3) Compared with the internal friction factors in the direct shear test under applied normal stress, the internal friction factors obtained in the triaxial compression test showed larger values for coarse powders and lower values for fine powder. However, the internal friction factors in the direct shear test under mean actual normal stress were nearly equal the actual values of the triaxial compression test.
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  • [title in Japanese]
    Makio NAITO, Junichiro TUBAKI
    1985 Volume 22 Issue 1 Pages 17-19
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.17
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Mitue KOIZUMI, Yoshinari MIYMOTO
    1985 Volume 22 Issue 1 Pages 20-31
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.20
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  • [title in Japanese]
    Shinya HAYASHI
    1985 Volume 22 Issue 1 Pages 32-40
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.32
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  • [title in Japanese]
    Yasuo KOUSAKA
    1985 Volume 22 Issue 1 Pages 51-54
    Published: January 10, 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.22.51
    JOURNAL FREE ACCESS
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