直流电机模型参数的直接辨识

直流电机的数学模型计算是直流调速系统设计的重要环节,传统方法求解得的直流电机模型参数误差大,且不能获得在线参数辨识。为了求出精确的直流电机模型参数,该文给出了求解直流电机数学模型的直接辩识算法,并以一个电机的实验为例,分别用传统方法和直接辨识算法求出了这个电机的模型参数,和阶跃响应曲线。通过对这两种方法所求得的结果进行仿真比较,证明直接辨识算法可行,模型的精确性有明显改善。

Direct Identification of DC Electromotor Model Parameter

How to work out the mathematic model of DC electromotor is very important to design a DC adjusted velocity system.The parameter error of the DC electromotor model worked out by traditional method is big,and the in-line parameter identification can't be acquired by traditional method.In order to work out the model parameter of DC electromotor,this paper gives a direct identification arithmetic which is used to work out DC electromotor mathematic model.Taking an electromotor as example,the electromotor model parameter and its step response curve are worked out by traditional method and the direct identification arithmetic respectively.Through the comparison of the two simulation results,it is proved that the direct identification arithmetic is feasible and the accuracy of the model is improved clearly.