为了提高河工模型试验自动控制的水平,确保试验过程的精确性,自主开发了尾门水位控制系统。通过研究尾门结构,采用尾门水位的PID调节算法,结合拉格朗日插值方法,实现了尾门水位的自动控制。恒定流和非恒定流试验结果表明:该控制系统保证了尾门水位控制的快速性和稳定性;提高了试验精度,其尾门水位控制重复精度<1 mm;该系统可使河工模型研究试验的可重复性得到提高,且提高了试验效率,节约了试验成本。

A tail gate water level control system was developed independently to improve the automatic control of river model testing and ensure the accuracy of experiment. The system was developed by adopting PID regulation algorithm and Lagrange interpolation method. Tests of steady flow and non-steady flow proved that the control system ensured the speed and stability of tail gate level control and improved the accuracy of the experiment. The repetitive precision of tail-water controlling is less than one millimeter. The results suggest that the system could improve the experiment’s repeat accuracy, enhance efficiency, and reduce the cost of experiment.