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提出采用卡尔曼滤波器的方法来实现主动磁轴承的位置自检测,该方法利用卡尔曼滤波器来解决转子的偏心问题,并为验证该方法的有效性,针对三极磁轴承,实现其转子径向位移和速度的估算。所设计的卡尔曼滤波器利用经过滤波的线圈电压和控制器的输入作为计算转子位置和速度估算值的输入信号。卡尔曼滤波器的估算值通过检测输入和输出数据进行数字模拟,其中,不可观测的偏心问题可以当作未知状态。结果表明,采用所提出的位置自检测方法可以成功估算磁轴承的偏心位移值,且位移估算值和实际检测值一致。
The method of Kalman filter is proposed to realize the position self-test of active magnetic bearings. This method uses Kalman filter to solve the problem of rotor eccentricity. In order to verify the effectiveness of this method, Radial displacement and velocity estimation. The designed Kalman filter uses the filtered coil voltage and controller input as input to calculate rotor position and velocity estimates. The estimated Kalman filter is digitally simulated by testing the input and output data, where the unobservable eccentricity problem can be considered as an unknown state. The results show that the proposed position self-test method can successfully estimate the eccentric displacement of the magnetic bearing, and the estimated displacement value is consistent with the actual test value.