系统辨识的一种方法——状态反馈法

One Method of System Identification-the Method of State Feedback

本文对一类动态系统给出一种辨识方法。以一个已知的线性控制系统作为参考系统,使其输出跟踪未知系统输出的方法确定出参考系统的控制输入,从而把系统辨识问题化为构造参考系统状态反馈的函数拟合问题。本方法不受系统的线性和非线性的约束。对二阶线性和非线性系统的辨识仿真计算表明本方法的效果良好。

The nonlinear terms in a nonlinear system may be considered as the effect of nonlinear state feedback. In this paper the system identification problem will be transfered to the control problem of linear control systems. We will choose the control value in the linear system such that the output of the linear system tracks the output of given nonlinear system. Then the identification problem may be solved by the typical function approximation methods.