一种辩识多输入多输出振动系统参数的方法

A Mimo Identification Algorithm on the Parameters of Vibration System

本文讨论的是多输入、多输出串联振动系统传递函数的辩识问题.本文表明:从系统结构来看,多输入、多输出串联振动系统可以化成为多重交叉闭环系统.本文将这类振动系统的传递函数分解成多个二阶子系统.从系统辩识的角度出发,提出了一种通过辩识子系统传递函数,实现对整个系统传递函数辩识的新方法.仿真结果及模型实验结果表明:这种方法是可行的,且具有较高的精度.

This paper deals with the problem of identifying transfer function in MIMO series vibration system. It shows that such MIMO vibration system can be expressed a multiple crossed closed loop system in view of system structure. In this paper, the transfer function of underlying vibration system can be dissociated into several second order subsystems. Based on system identification theory, a new algorithm is put forward to realize the identification of the transfer function of whole system by identifying the transfer function of each subsystem respectively. The results of simulation and model experiment show that this algorithm is feasible and highly precise.