基于系统辨识的开关磁阻电机PI参数整定

PI Parameter Tuning for the Switched Reluctance motor Based on System Identification

简要介绍了系统辨识的概念和模型。在Matlab建立的开关磁阻电机模型基础上,给定一个阶跃的斩波信号得到电机的阶跃响应从而求得SR电机小信号模型。利用系统辨识的方法将SR发电系统视为一个二阶系统,即ARX模型,并由Matlab的系统辨识工具对发电系统进行辨识,得到了系统的PI传递函数,利用劳思判据求解稳定性的方法解出电机Ki、Kp的参数范围,并通过实验验证了方案的可行性。

This paper introduced the concept of system identification and model.Based on the model of SRG created using Matlab,given a step chopper signals in order to achieve the step response of small-signal model.Using of system identification methods,generating system of SR motor will be as a second-order system,that is,ARX model,can get the system transfer function of PI by Matlab system identification tool.Using Lauth criterion to solve the stability criterion method can get motor Ki,Kp parameters,and experiments verify the feasibility of the method.