Modeling and Analysis of Drift Error from Stator of A MSSG with Double Spherical Envelope Surfaces
- Resource Type
- Academic Journal
- Authors
- Chao-Jun Xin; Yuan-Wen Cai; Yuan Ren; Ya-Hong Fan
- Source
- Journal of Electrical Engineering & Technology. 2016-09 11(5):1475-1485
- Subject
- Magnetically suspended sensitive gyroscope (MSSG)
Drift error
Disturbing torque
Spherical rotor
Stator magnetic pole
- Language
- Korean
- ISSN
- 1975-0102
2093-7423
For the newly developing magnetically suspended sensitive gyroscope (MSSG) with double spherical envelope surfaces, it is necessary to analyze the causes of drift error to improve sensing accuracy. This paper builds the models of disturbing torques generated by stator assembly and process errors based on the geometric construction and running regularity of the MSSG, and further reveals the generation mechanism of the drift error. Then the drift error from a single stator magnetic pole is calculated quantitatively with the established model, and the key factors producing the drift error are further discussed. It is proposed that the main approaches in reducing the drift error from stator are guaranteeing the rotor envelope surface to be an ideal spherical and improving the controlling precision of rotor displacement. The common problems associated in a gyroscope with a spherical rotor can be effectively resolved by the proposed method. This analysis provides a reference for the structure optimization and error compensation of a MSSG.