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Stability Analysis on Automatic Control Methods of Open Canal
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作者 feng xiaobo wang kang 《Wuhan University Journal of Natural Sciences》 CAS 2011年第4期325-331,共7页
The relationship between the automatic control method and the stability of the open canal is studied by means of numerical simulation of unsteady flow in an open canal under different methods of control. It is found t... The relationship between the automatic control method and the stability of the open canal is studied by means of numerical simulation of unsteady flow in an open canal under different methods of control. It is found the Proportional-Proportional plus Reset (P+PR) control is more reliable than the Linear Quadratic Regulator (LQR) control. Moreover, for the P+PR control, the hydraulic response of the constant volume method of operation is better than that of the constant downstream depth method in the type of centrally controlled canal. Therefore, an appropriate flow change rate should be chosen instead of shortening the pool length to reach an acceptable drawdown rate. For the canal with a bottom width of 40 m, side slope of 3, Manning n of 0.015, bottom slope of 0.000 04, and design flow of 600 m3/s, the pool length of more than 30 km can provide acceptable drawdown rates of 0.2 m/h when a proper flow change rate is chosen. 展开更多
关键词 open canal automatic control Chinese South-to- North Water Diversion Project unsteady flow
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