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Title Transcription
パソコン ニヨル カヘン コウバイ カイスイロ ノ リュウリョウ セイギョ ニ カンスル ケンキュウ 1 ナガレ ノ セイギョ キノウ ニツイテ
Title Alternative
Studies on the Flow Control System in Tilting Open Channel Flume by Personal Computer(I) : On the Flow Control Functions
File
language
jpn
Author
Takeyama, Kouichi
Fukushima, Akira
Tanaka, Reijiro
Otani, Tetsuya
Description
Some functions of water flow through the tilting open channel flume made of acrylates controled by personal computer, which is connected with electromagnetic flow meter and frequency convertor of motor pump, respectively.
The comparisons of constant-value, follow-up and programed controls in stability time lag and features showed as follows.
In constant-value control, the commercial electric source showed the best stability.
But in the follow up and programed control, the faster the change of desired discharge, the bigger the deviation became.
In paticular, in a linear hydrograph as the discharge changed 5 to 20(l/s) in 12 minutes, the average value of control deviation was less than 0.3(l/s). Nextly, in the sine curved hydrograph with 8 to 15(l/s) in average, 2 to 5(l/s) in amplitude and 0.5 to 12.0 minutes in period was examined. And in order to generate the desired sine curved hydrograph, the necessity of the refomation of input sine curve as the functions of the desired one, K(a, (dt)/T,β), and α((dt)/T, β) were recognized, where is a in amplitude, T in period of desired sine curve, and β in the the ratio of the manupulated variable to the control deviation in time dt, where is K in multiplier to a and α in phase for refomation.
Then, the Manning's coefficient of roughness, wave propagations and its reformation with amplified or damped oscillation in this flume were easily estimated and this system showed much convenience to such experiment of steady or unsteady flow.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
19
Start Page
105
End Page
109
ISSN
0370940X
Published Date
1985-12-20
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science
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