1. Hangzhou Extremely Weak Magnetic Field Major Science and Technology Infrastructure Research Institute, Hangzhou, China
2. Beijing Engineering Research Center of High-Speed Magnetically Suspended Motor Technology and Application, Beihang University, Beijing, China
3. Zhejiang Engineering Research Center of Precision Electromagnetic Control Technology and Equipment, Ningbo Institute of Technology, Beihang University, Ningbo, China
4. Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou, China
5. Aeronautics Engineering College, Air Force Engineering University, Xi'an, China