DACL System Dynamic Performance. II: Laboratory Model Testing
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VIEW THE ORIGINAL ARTICLEPublication: Journal of Irrigation and Drainage Engineering
Volume 119, Issue 1
Abstract
This paper examines the dynamic performance of the dual‐acting controlled‐leak (DACL) system. The methodology and results of tests conducted on a DACL laboratory model configured for downstream control are reported. Water‐level responses in the controlled reach of the secondary channel to nominal step input changes in both the primary‐channel water level and set‐point level were measured. Laboratory test results showed that final values of the actual responses came to within about 1 mm of the predicted final values. This is in accord with control theory and previous findings that DACL systems can control water levels to within very narrow band widths. Use of the system response equations in the design of an irrigation turnout is demonstrated.
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References
1.
Bright, J. C. (1986). “Determining minimum cost turnout systems for border‐strip irrigation schemes.” Report No. WS1202, Water and Soil Directorate, Ministry of Works and Devel., Christchurch, New Zealand.
2.
Casangcapan, M. E., and Chilcott, R. E. (1993). “DACL system performance: I. Response prediction analysis.” J. Irrig. and Drain. Engrg., ASCE, 119(1) 50–63.
3.
Clemmens, A. J., and Replogle, J. A. (1987). “Mechanical‐hydraulic dual‐acting controller for canal level or discharge rate.” J. Irrig. and Drain. Engrg., ASCE, 113(1), 69–85.
4.
Clemmens, A. J., Wang, C., and Replogle, J. A. (1990). “Dynamic response of automatic water‐level controller. II: Applications.” J. Irrig. and Drain. Engrg., ASCE, 116(6), 784–796.
5.
Dorf, R. C. (1989). Modern control systems. 5th Ed., Addison‐Wesley Publishing Co., Reading, Mass.
6.
Schwarzenbach, J., and Gill, K. F. (1984). System modelling and control. Edward Arnold, London, England.
7.
Simpson, A. K. (1986). Bladder valve commissioning report. Civ. Design Office, Ministry of Works and Devel., Christchurch, New Zealand.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 119 • Issue 1 • January 1993
Pages: 64 - 73
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Sep 6, 1991
Published online: Jan 1, 1993
Published in print: Jan 1993
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