机理与实验结合的对象建模方法研究

Research on Object Modeling Method of Combining the Mechanism with Experiments

对象建模在研究对象的特性,描述对象的输入量和输出量之间的关系上发挥着不可替代的作用。但是由于研究对象的复杂性、非线性,往往使得模型参数不容易通过机理分析的方式求得。针对该问题,提出一种机理和实验结合的对象建模方法,该方法通过对象或过程的内部原理得到其机理模型,再结合实验数据或图像特征,确定模型参数。通过单容自衡水箱实验,表明该方法既能准确地描述对象的内部机理,又能简单方便地通过实验确定其模型参数。

Object modeling plays an irreplaceable role in researching the characteristics of the object and describing the relationship between inputs and outputs of it. But because of the complexity as well as nonlinear of the object to be study,the model parameters are not easily obtained by means of mechanism analysis. Aiming at this problem,a kind of object modeling method which is combined the mechanism with experiments is put forward. The mechanism model is obtained by principles in internals or process of the object. Combining experimental data or image characteristics,the model parameters are determined. The simulation experiments of the self-balance one-tank shows the method not only can accurately describe objects,but also determine the model parameters through experiments simple and conveniently.