基于键图模型的动力学系统状态观测器结构设计

Designing of State Observer of Dynamics Systems Based on Bond Graph Model

以键图模型为工具,提出了一种新的状态观测器结构设计方法用于动力学系统.该方法利用建模过程中因果关系的应用规则,可以很方便地对某些物理效应进行增删,导出构成降阶模型所要求的状态变量的类型、数目及其效应,以确定观测器结构.以这种方式构筑的模型,建模过程更为快捷,与原物理系统保持直观、密切的联系,有助于对各步骤给出清楚的物理解释,并以规范化的方式,实现完全状态观测器及降阶状态观测器的设计.

With the bond graph model, a new structure for the designing of state observer in modeling of dynamics system is discussed. The method can make augments and retrenchments to some physical effects expediently by means of causality rules in modeling processing, and educe the type, the number and the effects of state variable required by producing low lever model. In this way, modeling is much more prompt. It maintains a visual and intimate connection with original physica1 system. This is helpful in giving a clear physical explanation for each step. In a unified way, the designs of complete state observer and partial observer can be fulfilled. The designing steps and examples are given out in the paper.