| Citation: | XIA C F，WANG X L，LI Z，et al. Field balancing method for rotor system of magnetically suspended control and sensing gyro[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（11）：3417-3425 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0852
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A field balancing solution based on current response is proposed to optimize mass distribution and eliminate dynamic unbalanced vibration in the rotor tilt mechanism of a magnetically suspended control and sensing gyro (MSCSG). The working principle of the magnetic bearing-rotor system is first analyzed. Then the geometric analytic relation between the geometric and inertial axis of the rotor is achieved on the condition that the rotor is unbalanced, and the static and dynamic unbalance of the rotor are quantitatively analyzed. On the basis of this, a secondary correction method with the benefit of excellent linearity in Lorentz force magnetic bearing (LFMB) is used to infer the relationship between imbalanced mass and rotor control current. Thus the rotor mass distribution is improved by field balancing, so as to reduce the unbalanced vibration in the rotor system from the root. Experiment results of field balancing show that the proposed method can reduce the dynamic unbalance vibration peak value of the rotor system by 67.7% which verifies the effectiveness of the proposed method.
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