中文摘要：

应用流体力学原理对三容水箱液位系统进行分析,并在不同的工作点对水箱系统建立机理模型。基于不同的模型结构：线性模型、BP神经网络模型、非线性Hammerstein ARMAX模型,利用测量到的输入输出数据辨识对象的模型参数,对水箱系统建立数学模型,并通过仿真检验模型的有效性。不同的模型结构和相应参数及其辨识方法将对控制系统的设计具有很强的指导意义。

英文摘要：

The hydrodynamics character of Three-Tank Water Level System was analyzed,and the mechanism models of around different working points were proposed. Based on different model structures：linear model,BP neural network model,nonlinear Hammerstein ARMAX model,the mathematic models of Water Level System were established by identifying model parameters with the measured input and output data. Simulation study was given to test the effectiveness of different models. Different model structure and the corresponding identification methods will be a basement for the design of control system.