TECHNICAL PAPERS
Nov 1, 1990

Dynamic Response of Automatic Water‐Level Controller. I: Theory

Publication: Journal of Irrigation and Drainage Engineering
Volume 116, Issue 6

Abstract

Controllers that maintain constant water levels at various locations within irrigation canal distribution systems are used in a number of locations. Most are custom‐developed and tested on a particular system or direct copies of earlier successful versions. Design of such feedback‐control mechanisms is hampered by a lack of information on the dynamic response of the control system to various conditions. In this paper, we examine the dynamic response of one type of mechanical‐hydraulic controller, the dual acting controlled leak system (DACL). Simple transfer‐function equations are developed, from which the stability and dynamic response of the system can be evaluated. These characteristics are evaluated in a companion paper.

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References

1.
Clemmens, A. J., and Replogle, J. A. (1987a). “Mechanical‐hydraulic dual‐acting controller for canal level or discharge rate.” J. Irrig. and Drain. Engrg., ASCE, 113(1), 69–85.
2.
Clemmens, A. J., and Replogle, J. A. (1987b). “Controlled leak methods for water level control.” Planning, Operation, Rehabilitation and Automation of Irrigation Water Delivery Systems, ASCE Symp. Proc., Portland, Oreg., 133–141.
3.
Groover, M. P. (1980). Automation, production systems, and computer‐aided manufacturing. Prentice‐Hall, Englewood Cliffs, N.J.
4.
Replogle, J. A., and Clemmens, A. J. (1986). “Operation of hydraulically controlled automatic gates.” Summer Meeting Amer. Soc. of Agric. Engrg., San Luis Obispo, Calif., Jun. 29–Jul. 2, 86–2080.
5.
Replogle, J. A., and Clemmens, A. J. (1987). “Automatic regulation of canal offtakes.” Irrig. Drain. Systems, 1(2), 123–142.
6.
Shand, M. J. (1971). “Automatic downstream control systems for irrigation canals.” Tech. Rept. HEL‐8‐4, Hydr. Engrg. Lab., Univ. of California, Berkeley, Calif.
7.
Tamai, N., and Iwasaki, K. (1983). “Discharge arrival time in open channel flows.” Proc. XXth Congress, Int. Assoc. for Hydr. Res., V, 189–201.

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Go to Journal of Irrigation and Drainage Engineering
Journal of Irrigation and Drainage Engineering
Volume 116Issue 6November 1990
Pages: 769 - 783

History

Published online: Nov 1, 1990
Published in print: Nov 1990

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Authors

Affiliations

Changde Wang
Lect., Wuhan Univ. of Hydr. and Electrical Engrg., Luojia Hill, Wuhan, China
Albert J. Clemmens, Member, ASCE
Res. Hydr. Engr., U.S. Water Conserv. Lab., U.S. Dept. of Agr., Agric. Res. Service, 4331 E. Broadway, Phoenix, AZ 85040
William E. Hart
Prof., Agric. Engrg., Univ. of Arizona, Tucson, AZ 85721

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