作用于转子系统的正弦载荷定量识别研究

Study on the Quantitative Identification of Sine Load Acting on Rotor System

为了通过监测电机定子电流来实现作用于转子系统正弦载荷的识别,提出了两种载荷定量的方法。方法一建立异步电机—转子系统机电耦合方程,由已知的三相电流求解方程得到了原载荷。方法二结合支持向量机和希尔伯特模量法,根据定子电流信息确定了作用在转子系统上正弦载荷的幅值和频率,进而还原出载荷。通过搭建的转子系统实验台,进行了载荷定量的实例识别,所得的结果验证了两种方法的有效性并根据识别结果分析了两种方法各自的优缺点。

In order to realize the identification of the sine load of the rotor system by monitoring the stator current of the motor, two kinds of methods were presented. The first method established asynchronous motor - rotor system electromechanical coupling equation and by solving the equations from the known three-phase current to obtained the original load. The second method combined the support vector machine and the Hilbert modulus method, according to the stator current information to determi^d the amplitude and frequency of the sine load acting on rotor system, thereby restored the load. The load quantitative identification was carried out through constructing the rotor system test bench, the results verified the effectiveness of the two methods and analyzed the advantages and disadvantages of the two methods.