中文说明：利用Kalman及EKF对两相永磁同步电机的状态进行估计。假设电机线圈电流可测，利用 EFK来估计电机的位置和转速。
English Description：
Kalman and EKF are used to estimate the state of two-phase permanent magnet synchronous motor. Assuming that the motor coil current can be measured, efk is used to estimate the motor position and speed.