Volume 42 Issue 10
Oct.  2016
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XIN Chaojun, CAI Yuanwen, REN Yuan, et al. Dynamic modeling and key error sources analysis of magnetically suspended sensitive gyroscopes[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2048-2058. doi: 10.13700/j.bh.1001-5965.2015.0650(in Chinese)
Citation: XIN Chaojun, CAI Yuanwen, REN Yuan, et al. Dynamic modeling and key error sources analysis of magnetically suspended sensitive gyroscopes[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2048-2058. doi: 10.13700/j.bh.1001-5965.2015.0650(in Chinese)

Dynamic modeling and key error sources analysis of magnetically suspended sensitive gyroscopes

doi: 10.13700/j.bh.1001-5965.2015.0650
Funds:  National Natural Science Foundation of China (51475472)
  • Received Date: 08 Oct 2015
  • Publish Date: 20 Oct 2016
  • The mathematical model of a new magnetically suspended sensitive gyroscope (MSSG) with rotor of double spherical envelope surfaces is established based on rotor dynamics, and the key error sources of the gyro in sensing angular rate are analyzed theoretically. First, structural features and sensing principles of the MSSG are described. Second, the theoretical models of electromagnetic forces and moments acting on the rotor are built respectively. The influencing mechanisms of rotor translation and titling on its mechanical state are analyzed. Simulation results by finite-element method software ANSYS are basically in agreement with the calculated results. Finally, two key error sources of rotor asphericity and Lorentz force magnetic bearing process errors are analyzed, and the analytical expression of the disturbing torques has been constructed. Calculation results show that the rotor aspheric factors and the inhomogeneous magnetic field in Lorentz force magnetic bearing are the major factors inducing disturbance torques. The model provides a valuable theoretical basis for further research on optimization design and analysis of the MSSG.

     

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