| Citation: | XIA Changfeng, CAI Yuanwen, REN Yuan, et al. Principle analysis and modeling of rotor imbalance vibration in magnetically suspended control and sensing gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(11): 2321-2328. doi: 10.13700/j.bh.1001-5965.2018.0044(in Chinese)
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Magnetically suspended control and sensing gyroscope (MSCSG) is a kind of new-concept gyro, which takes Lorentz force magnetic bearing as torquer to drive the rotor to tilt in radial direction. As there is dynamic unbalance in the magnetically suspended rotor system because of the uneven mass distribution, the generation principle of imbalance vibration is analyzed and the analytic model of it is established. First, the working principle of MSCSG is introduced. Then, the geometric analytic relation between geometric and inertial axis of rotor is determined on condition that rotor is unbalanced; the mathematic model of unba-lance vibration torque is established and the observability of imbalance disturbance is demonstrated. The model of bearing-rotor control system containing vibration source is constructed and the vibration generation mechanism in closed-loop system is analyzed. The dynamic response characteristics of unbalance vibration with different rotate speeds are simulated and the simulation result indicates the correctness of the proposed model. Finally, the requirement for suppression of unbalance vibration is put forward according to its vibration characteristics, which lays the theoretical foundation for realizing MSCSG rotor imbalance vibration control.
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