平面开关磁阻电机非线性力电流转换模型

Nonlinear Model of Force-to-Current Inverse Transform for the Planar Switched Reluctance Motor

为提高平面开关磁阻电机的运动精度,提出了一种平面开关磁阻电机非线性力电流转换模型。该模型表示为一个稀疏最小二乘支持向量机,以实测数据作为训练样本,利用交叉验证方法确定了稀疏最小二乘支持向量机参数,并通过实测的样本进行了准确性验证。构建了基于该模型的平面开关磁阻电机PD控制系统,并进行了系统运动控制实验。研究结果表明,该模型的相电流预测准确度高、建模误差小,基于该模型的平面开关磁阻电机系统能够实现稳定、平稳和精确的轨迹跟踪。

This paper proposed a nonlinear model of force-to-current inverse transform for theplanar switched reluctance motor(PSRM)to improve motion accuracy.This model was expressed as asparse least squares support vector machines(LS-SVM).The training set was firstly acquired fromexperimental measurement.The parameters of the sparse LS-SVM were further determined through thecross-validation method.Then the accuracy of the sparse LS-SVM was assessed via the testing set fromexperimental measurement.Additionally,the PSRM system with PD controllers was built by this model.Finally,the experiments of system motion control were carried out.The results demonstrated that withthe proposed model,the precision of estimated current is high and the modeling error is small.ThePSRM system based on the model can achieve trajectory tracking steadily,smoothly,and accurately.