1. Maglev Transportation Engineering R&D Center, College of Electronics and Information Engineering, Tongji Univ., P.O. Box 201804, Shanghai, China.
2. Professor, College of Electronics and Information Engineering, Tongji Univ., P.O. Box 201804, Shanghai, China.
3. Professor, Maglev Transportation Engineering R&D Center, Tongji Univ., P.O. Box 201804, Shanghai, China.
4. Maglev Transportation Engineering R&D Center, Tongji Univ., P.O. Box 201804, Shanghai, China.