Shupei Li Liwei Song Jingyu Wang Size Li Xiaofei Lei Decoupling active and passive hybrid radial magnetic bearing. 1-6 2015 ICCAIS https://doi.org/10.1109/ICCAIS.2015.7338640 conf/iccais/2015 db/conf/iccais/iccais2015.html#LiSWLL15